B plus B SmartWorx QTM85242000 Radio RF Modem, QTM-8524 User Manual man

B&B; Electronics Radio RF Modem, QTM-8524 man

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QTM-85242.4 GHz RF Radio Modem ModuleUsers ManualQUATECH, Inc. TEL: (330) 434-3154662 Wolf Ledges Pkwy FAX: (330) 434-1409Akron, Ohio 44311 http://www.quatech.comWIRELESS MODEM MODULEFOR QTM-8000 SERIES SYSTEMS
QTM-8524User’s ManualRevision 1.0PN
Warranty InformationQuatech Inc. warrants the QTM-8524 to be free of defects for one(1) year from the date of purchase. Quatech Inc. will repair or replace anysystem component that fails to perform under normal operating conditionsin accordance with the procedures outlined in this document, provided thefailure occurs during the one year warranty period. Any damage resultingfrom improper installation, operation or general misuse voids all warrantyrights. No representation is made regarding the suitability of this productfor any particular purpose.Please complete the following information and retain for your records.Date of Purchase:Model Number: QTM-8524Product: 2.4 GHz RF Radio Modem_Serial Number:All products returned to Quatech for either warranty or non-warranty repair MUST be assigned a Returned Material Authorization (RMA)number prior to shipment. This RMA number must be clearly marked on theexterior of the product’s return packaging and in any correspondence toensure proper routing and prompt attention. To obtain an RMA number,contact the Quatech Technical Support Department at 1-800-553-1170 or(330) 434-3154. In order to prevent damage to returned merchandise duringshipment, please package electronic components in anti-static/shock proofmaterials.For warranty repair/returns, please have the following information availablewhen contacting the Technical Support department:1. Model number and serial number of the product under warranty,2. Repair instructions and/or specific description of the problem.For non-warranty repairs or upgrades, contact the Technical Supportdepartment for current repair charges and please have the followinginformation available:1. Purchase order number to cover the cost of the service,2. Model number and serial number of the product,3. Repair or upgrade instructions relative to the product.
NoticeThe information contained in this document cannot bereproduced in any form without the written consent of QuatechInc. Any software programs accompanying this document canbe used only in accordance with any licensing agreement(s)between the purchaser and Quatech Inc. Quatech Inc. reservesthe right to change this documentation or the product to whichit refers at any time and without notice.The authors have taken due care in the preparation of thisdocument and any associated software program(s). Everyattempt has been made to ensure accuracy and completeness.Under no circumstances will Quatech Inc. be liable for damagesof any kind, incidental or consequential, in regard to or arisingfrom the performance or form of the materials presented hereinor in any software program(s) that may accompany thisdocument.Quatech Inc. encourages and appreciates feedback concerningthis document. Please send any written comments to theTechnical Support Department at the address listed on thecover of this manual.
Table of Contents1. Introduction 91.1 Available QTM-8000 Series Modules 101.2 QTM-8000 Series Common Features 111.3 QTM-8000 Series Wireless Networks 121.3.1 Disadvantages of Conventional Two-WireRS-485 Networks 131.3.2 The QTM-8000 Series Network Advantage 141.3.3 Operation Principle 151.3.4 Supporting Multiple Baud Rates 161.4 QTM-8000 Series Module dimensions 172. QTM-8524 Specifications 202.1 Pin Assignments 202.2 QTM-8524 Module Specifications 212.3 QTM-8524 Block Diagram 222.4 QTM-8524 Disassembly 222.5 QTM-8524 Jumper Settings 242.6 QTM-8524 Basic Wire Connections 262.6.1 RS-232 Connection Between PC and QTM-8524 262.6.2 Connecting QTM-8000 Modules to the QTM-8524 263. Antennas 273.1 QTM-8524 Antenna Options 273.1.1 QTM-24ANT-SW Specifications 273.1.2 QTM-24ANT-C Specifications 283.2 Connecting Antennas to QTM-8524 Modules 293.2.1 Site Selection 293.2.2 Installation 293.2.3 Connection 293.3 Mounting External Antennas 303.3.1 Mounting the QTM-24ANT-SW 303.3.2 Mounting the QTM-24ANT-C 323.3.3 RF Safety 34
4. Configuration 344.1 RS-232 or RS-485 Configuration 344.2 Half-Duplex and Full-Duplex Operation 344.3 Synchronous and Asynchronous Communication 354.4 Configuration Modes 364.4.1 Mode 1: Full-Duplex, Synchronous 374.4.2 Mode 2: Half-Duplex, Synchronous 384.4.3 Mode 3: Full-Duplex, Asynchronous 395. Application Examples 405.1 Peer-to-Peer Communication (Mode 1) 405.2 Interfacing with QTM-8000 Modules (Mode 1) 415.3 Multiple PC Communication (Mode 2) 425.4 Asynchronous Communication (Mode 3) 436. Approvals 44
List of Figures1.3 QTM-8000 Series Network with Multiple Baud Ratesand Multiple Data Formats 121.3.2.1 Single Baud Rate QTM-8000 Wireless Network 131.3.2.2 Multi-Baud Rate Wireless QTM-8000 Network 141.4.1 QTM-8000 Series Front, Side, Rear and Top Views 171.4.2 QTM-8000 Series DIN Rail Mounting 181.4.3 QTM-8000 Series Panel Mounting 192.3 QTM-8524 Block Diagram 222.4 Disassembling the QTM-8524 232.5 QTM-8524 Jumper Settings 252.5.1 Connecting QTM-8524 to DB-9 Serial Cable 262.5.2 Connecting QTM-8524 to QTM-8000 I/O Modules 263.1.1 QTM-24ANT-SW Transmission Pattern 273..1.2 QTM-24ANT-C Transmission Pattern 283.3.1.1 Mounting the QTM-24ANT-SW Steps 1-6 303.3.1.2 Mounting the QTM-24ANT-SW Step 7 313.3.2.1 Installing the QTM-24ANT-C Ceiling Mount Bracket 333.3.2.2 Connecting the QTM-24ANT-C Antenna to the Bracket 335.1 QTM-8524 Peer-to-Peer Communication 405.2 QTM-8524 as part of a QTM-8000 Series I/O Network 415.3 QTM-8524 Modules Used to Network Multiple PCs 425.4 QTM-8524 Modules in an Asynchronous Network 43
Quatech QTM-8524 Manual 91. IntroductionThe QTM-8000 Series of modules is comprised of analog anddigital I/O modules designed for a wide variety of data ac-quisition and signal conditioning functions. These modulesare designed for an RS-485 communication network, and re-quire an RS-485 to RS-232 converter in order to be accessedthrough a standard PC serial port. The QTM-8520/8520Rmodule performs this function. Unlike many other convert-ers, the versatile QTM-8520 contains a unique self-tuner ASICthat allows it to process signals from multiple serial devicesoperating at different baud rates and using different data for-mats. This flexibility makes a QTM-8000 Series network anextremely cost effective solution for remote signal monitoringand control.The QTM-8524 is a radio modem module that can implementQTM-8000 Series modules as a wireless data acquisition andsignal conditioning network. The wireless communicationmodules form RF communication between peer-to-peer ormulti-point structures, which eliminates the use of long cables.Like the QTM-8520, the QTM-8524 functions as a RS-485 toRS-232 converter. However, it does not contain the self-tunerASIC which means that all modules operating in a QTM-8524wireless network must be functioning at the same baud rateand using the same data format. To implement a wireless net-work functioning at several different baud rates, a QTM-8520module must be used in conjunction with multiple pairs ofQTM-8524 modules.
10 Quatech QTM-8524 Manual1.1 Available QTM-8000 Series ModulesWireless Radio Modem Modules:QTM-8524: 2.4 GHz RF to RS-232 or RS-485 converterBus Conversion and Repeater Modules:QTM-8520: RS-232 to RS-485 converter with 3000V isolationQTM-8520R: RS-232 to RS-485 converter with 3000V isolationQTM-8510: RS-485 to RS-485 repeater with 3000V isolationDigital I/O Modules:QTM-8050: 7 digital input s, 8 TTL compatible digital outputsQTM-8052: 8 isolated digital input channelsQTM-8060: 4 isolated digital inputs, 4 digital relay outputsAnalog Output Modules:QTM-8021: Single channel analog (current or voltage) outputAnalog Input Modules:QTM-8013D: Single channel RTD analog inputQTM-8014D: 1 analog input, 1 digital input, 2 digital outputs,with LED display.QTM-8017: 8 channel analog input moduleQTM-8018: 8 channel thermocouple input moduleTimer/Counter Modules:QTM-8080D: 2 independent 32-bit counters,2 digital output channels 5 Hz to 50kHz frequency measurement range
Quatech QTM-8524 Manual 111.2 QTM-8000 Series Common FeaturesCommunication :❍Asynchronous half-duplex 2-wire RS-485 network❍Maximum network distance without repeater=4000 feet (1.2Km)❍Baud Rates: 600,1200,2400,4800,9600,19200,38400,57600 (bps)❍A single network can accommodate multiple devices with different baud rates and data formats❍QTM-8000 series data format=1 start + 8 data + 1 stop + no parity = 10-bit❍Two extra checksum bytes can be enabled or disabled❍Built-in transient voltage suppressor and PTC protector❍ASCII command/response protocol❍Plug-in screw terminal blockPower :❍+10V ~ +30V DC❍Power reverse protection, over-voltage brown-out protectionSystem :❍Internal Dual watchdog, power-on start value and safe value for host failure❍Operating temperature : -10 to 70ºC (14 to 185ºF)❍Storage temperature : -25 to 80ºC (-13 to 185ºF)❍Humidity : 5 to 95%, non-condensing❍Isolation voltage : 3000 VDC
12 Quatech QTM-8524 Manual1.3 QTM-8000 Series Wireless NetworksFigure 1.3--QTM-8000 Series Network with multiple baud rates and multiple data formats
Quatech QTM-8524 Manual 131.3.1 Disadvantages of Conventional Two-Wire RS-485Networks:In a standard RS-485 network, a converter is used to adapt the host PC’ssingle wire RS-232 signal to the two-wire RS-485 signal required by thenetwork. However, when using a standard converter, not only must thebaud rate and data format for all signals remain fixed, but they must beidentical for all incoming signals. This can pose a problem if multiple typesof devices are to be used in a single system, such as a QTM module operatingat 115200 bps with a 10-bit per channel data format, and a standard PLCoperating at 9600 bps with an 11-bit data format. One solution to thisproblem is to use two independent two-wire RS-485 networks to accommo-date both devices. However, this can increase overall system cost and de-crease system reliability. If devices are capable of operating at different baudrates, but share a single data format, a single standard two-wire RS-485network can be used, provided that all devices are set to use the lowestcommon baud rate. While this solution may save on system cost, it is at theexpense of performance.1.3.2 The QTM-8000 Series Network Advantage:The most desirable system is one in which a single RS-485 network can beused to link devices operating at multiple baud rates with different dataformats. The QTM-8000 Series can do just that. Using the QTM-8520 con-verter module to auto-tune the network, up to 256 devices operating between1200 and 115200 bps can be controlled via a single standard RS-232 serialport. (Using a QTM-8510 repeater expands the network to 2, 048 devices.)For wireless networks, the QTM-8524 can convert and control the RS-485network. However, a single baud rate, channel, and frequency must be jumperselected for each module pair. This means that if a QTM-8524 is connecteddirectly to the computer’s serial port, the network can only function at asingle baud rate. To support multiple baud rates in a QTM-8000 wirelessnetwork, the QTM-8520 must be used in conjunction with a pair of QTM-8524 RF modules for each desired baud rate. (See figures 1.3.2.1 & 1.3.2.2)Figure 1.3.2.1--QTM-8000 Series Network using a single pair of QTM-8524 modules as an interface to the PC.Baud Rate=19.2 kbps
14 Quatech QTM-8524 ManualFigure 1.3.2.2--Using a QTM-8520 convertermodule in conjunction with multiple pairs ofQTM-8524 modules to support multiple baud ratesin a wireless QTM-8000 Series network
Quatech QTM-8524 Manual 151.3.3 Operation Principle (Refer to Figure 1.3.2.1 & 1.3.2.2):(1) The Host PC sends out a command via COM1.(2) The QTM-8520 or upstream QTM-8524 converts the RS-232 signal intoa RS-485 signal or a RF signal respectively.(3) All modules connected to the RS-485 network will simultaneouslyreceive this command. Each module in the network will extract thedestination address field and compare this value to its local moduleaddress. The receiving wireless module first converts the RF signal toRS-485, then sends the command to the downstream modules.(4) The module to which the command was addressed will execute it, andthe other modules will ignore the command.(5) After executing the command, the addressed module sends a responseback to the host PC over the RS-485 or RS-485/RF network.(6) The QTM-8520 or upstream QTM-8524 module processes the responseand converts it from RF/RS-485 to RS-232 for use by the Host PC(7) Host PC will interpret this result and take appropriate action.
16 Quatech QTM-8524 Manual1.3.4 Supporting Multiple Baud RatesAs noted earlier, QTM-8000 Series networks support devices operating atdifferent baud rates. For example, in Figure 1.3 the diagram depicts a wire-less modem operating at 19200 bps, QTM-8000 Series modules operating at2400 bps and a PLC operating at 9600 bps. The QTM-8520 converter modulecan automatically switch to any baud rate in the 1200 bps to 115,200 bpsrange.In order to support multiple baud rates in a wireless network, the QTM-8520must be used to auto tune the network and pairs of QTM-8524 RF modulesare jumper configured to match the specific baud rate at which downstreammodules are operating. When the host PC sends commands it tailors themto the baud rate at which the target module is operating. The QTM-8520drives the signal from RS-232 to RS-485 at that given baud rate. The QTM-8524 that is configured for that same baud rate receives the RS-485 com-mands and converts them to RF. Any other QTM-8524 set for a differentbaud rate will ignore the command. The RF signal is transmitted along a setchannel as selected on the QTM-8524. The downstream QTM-8524 that isconfigured for that same channel receives the RF signal and converts thecommands to RS-485. These commands are then distributed to all the mod-ules downstream from the receiving QTM-8524. Each module at the targetbaud rate will determine whether the command is addressed to it (see step 3in section 1.3.3) and react appropriately.
Quatech QTM-8524 Manual 171.4 QTM-8000 Series Module DimensionsFigure 1.4.1--QTM-8000 Series Front, Side, Rear, and Top ViewsFRONT VIEW SIDE VIEW
18 Quatech QTM-8524 ManualFigure 1.4.2--QTM-8000 Series Din Rail Mounting
Quatech QTM-8524 Manual 19Plastic Part for Panel MountFigure 1.4.3--QTM-8000 Series Panel Mounting
20 Quatech QTM-8524 Manual2. QTM-8524 Specifications2.1 Pin AssignmentsQTM-8524Wireless RF ModemFrequency Range: 2.4 GHzChannel Spacing: 2 MHzRF Power Output: 0.707WInterface: RS-232/RS-4851120110(RS-485)DSRRXTXComputerGND(Y)D+(G)D-(R)+VsPowerGND
Quatech QTM-8524 Manual 21QTM-8524: 2.4 GHz RS-232/RS-485 to RF ConverterRF Communication TransceiverFrequency Band: 2426 to 2458 MHzChannel Spacing: 2.048 MHz (8 Channels jumper select)Peak Output Power: 28.5 dBm ±2 dB (.707 watts)Modulation: Gaussian Minimum Shift Keying (GMSK)Time Division DuplexingTransmission Range: RS-232Line of Sight: .35 milesSemi-Open: 150 ft.Direct Sequence Spread SpectrumNon-Overlapping Channels: 8 Channels, Jumper selectable (Full-Duplex Mode Only)Modes of Operation: Full Duplex or Half Duplex, Jumper selectableCommunication: Asynchronous or Synchronous, Jumper selectableSerial Communication InterfaceRS-232 (TxD, RxD, GND) or RS-485 (D+, D-), Jumper selectableBaud Rate: 600 bps to 57.6 kbps, Jumper selectableEnvironmentsOperating Temperature: 0 °C to 50 °CStorage Temperature: -30 °C to 70 °CPower SupplyVs: +10V to +30V DC UnregulatedPower Consumption: 1.5W2.2 QTM-8524 Module SpecificationsNote: The QTM-8524 must operate in full-duplex,synchronous mode in order to be used withQTM-8000 Series data acquisition and signalconditioning modules.
22 Quatech QTM-8524 ManualTXRXD+D-+VsGNDRS-232InterfaceRS-485InterfacePowerRegulatorEmbeddedControllerTransceiver GMSKRFModule antenna+5VQTM-85242.3 QTM-8524 Block Diagram2.4 QTM-8524 DisassemblyDisassembly of the QTM-8524 is required to change the jumper settings.Please refer to figure 2.4 and follow the steps below to disassemble themodule:1. Remove the DIN rail mounting bracket by loosening the screws on the front of the unit.2. Remove the two (2) small screws that were under the DIN rail mounting bracket.3. Using a small flat bladed screwdriver, gently pry at the corners to separate the plastic case.4. Set the jumpers as desired and replace the radio assembly in the case. Use care not to flex the cable too much while setting the jumpers.Figure 2.3--QTM-8524 Block Diagram
Quatech QTM-8524 Manual 235. Snap the case back together firmly.6. Insert the two (2) small screws in the back of the unit.7. Place the DIN rail bracket back (notice locating pins on the bottom of the bracket) and secure tightly.Remove for disassemblyRemove for disassemblyREAR VIEWFigure 2.4--Disassembling the QTM-8524
24 Quatech QTM-8524 Manual2.5 QTM-8524 Jumper SettingsFactory default jumper settings are indicated below.·Channel 3·Baudrate (bps) = 9600 bps·Slave Mode·RS-232 Interface·Frequency Channel = 2439.936 MHz·Full Duplex Mode·Synchronous CommunicationFigure 2.5 on the following page diagrams the other possible jumper set-tings. See section 4 for more information about how QTM-8524 modulesshould be configured for different types of QTM-8000 wireless networks.Note that the QTM-8524 must be disassambled before jumper settings canbe changed. See section 2.4 for disassembly instructions.
Quatech QTM-8524 Manual 252426.112 MHz2430.720 MHz2435.328 MHz2439.936 MHz2444.544 MHz2449.152 MHz2453.760 MHz2458.368MHz(2) Frequency SelectChannel0Channel1Channel2Channel3Channel4Channel5Channel6Channel7(1) Channel Select600 bps1200 bps2400 bps4800 bps9600 bps19200 bps38400 bps57600 bps(3) Baud RateSelect(4) Full-DuplexHalf-Duplex(5) SlaveMaster(6)SynchronousAsynchronous(7) RS-232RS-485QTM-8524Figure 2.5.--QTM-8524 Jumper Settings
26 Quatech QTM-8524 Manual2.6 QTM-8524 Basic Wire Connections(1) Position Jumper 7 to RS-232as shown(2) Connect QTM-8524 GND, TXand RX to CA-0910’s corre-sponding RS-232 GND, TX andRX(3) Connect CA-9010’s DB-9 femaleconnector to the PC’s RS-232DB-9 male connector2.6.1 RS-232 connection between PC and QTM-8524(1) Position Jumper 7 to RS-485as shown(2) Connect QTM-8524 D+ to D+ ofQTM-8000 RS-485 network(3) Connect QTM-8524 D- to D- ofQTM-8000 RS-485 network2.5.2 Connecting QTM-8000 modules to the QTM-8524(7) RS-232(7) RS-485 Figure 2.6.2--Connecting QTM-8524 to QTM-8000 ModulesThe QTM-8524 includes a cable that will allow you to connect your wirelessmodule directly to a PC. One end of the cable provides a standard D-9connector that plugs into a computer’s standard serial port. The other endhas exposed wires used for connecting with the QTM-8524. Follow theinstructions below to wire the module to the cable. Figure 2.6.1--Connecting QTM-8524 to DB-9 Serial Cable
Quatech QTM-8524 Manual 273. AntennasTwo antennas are available for use with the QTM-8524. The standard an-tenna, QTM-24ANT-SW, is for general purpose indoor/outdoor applica-tions, and can be conveniently wall-mounted on a swivel bracket. The op-tional monopole antenna, QTM-24ANT-C is ideal for office/lab applica-tions and can be easily mounted on the ceiling.3.1 QTM-8524 Antenna Options3.1.1 QTM-24ANT-SW SpecificationsStandard Wall-Mount AntennaType: PatchMount: Swivel bracketApplication: General PurposeGain: 7.5dBiFrequency: 2.4 GHzTransmission Range: 500 Meters, open line-of-sight (50M with barriers)Included Accessories: cable, hardware and connectorFigure 3.1.1--QTM-24ANT-SW Transmission Pattern
28 Quatech QTM-8524 Manual3.1.2 QTM-24ANT-C SpecificationsCeiling-Mount AntennaType: MonopoleMount: CeilingFrequency: 2.4 GHzGain: 3dBdWeight: 0.29lb ( 0.64 kg)Height: 9 in (22.9 cm)Nominal Impedance: 50 OhmsVSWR: 1.5:1 nominalTransmission Range: 500 Meters, open line-of-sight (50M with barriers)Radiating Element: Plated copper laminateEnclosure: PolycarbonateApplication: Office/lab, drop ceiling, transmissionIncluded Accessories: cable, hardware and connectorFigure 3.1.2--QTM-24ANT-C Transmission Pattern
Quatech QTM-8524 Manual 293.2 Connecting Antennas to QTM-8524 ModulesYour QTM-8524 is issued with a high quality communication antenna. Toget the maximum performance form your wireless system, please followthe directions and suggestions that follow.3.2.1 Site SelectionAntenna location is extremely important when installing your system. Ifpossible, try to keep the antenna away from any obstructions. Objects andstructures made of metal will reduce the efficiency of the antenna. Also,keep in mind that systems like cellular phone repeaters, other wireless LANs,and microwave ovens may interfere with the QTM-8524. If you encounterproblems with one frequency, try changing the frequency at which yourQTM-8524 modules are operating. Eight (8) different frequencies can beselected using jumper 2 on the module (see Figure 2.4 for a diagram of QTM-8524 jumper settings.).3.2.2 InstallationInstall the antenna and module as per the directions. See section 3.3.1 fordetailed QTM-24ANT-SW installation instructions and section 3.3.2 for de-tailed QTM-24ANT-C installation instructions. Be sure to mount the an-tenna BEFORE connecting it to the QTM-8524 module. The QTM wirelesssystem should be professionally installed.3.2.3 ConnectionBoth antennas are supplied with SMA connectors attached to the antennacable. These connectors are designed for optimum use at high frequencies.To connect the antenna to the module, carefully press the connectors to-gether and use your fingers to rotate the coupling net clockwise to tighten.DO NOT over-tighten the connection. A 5/16” open ended wrench can beused to secure the connection just a little past “finger-tight,” but no more.Over-tightening the connection may damage the mating surfaces of the con-nector, and reduce the performance of your wireless system. Use care not tocross-thread the connector. If you feel resistance when tightening, back thecoupling nut off and try again.If the connectors need to be cleaned, use a clean cotton swab and a little purealcohol. Let the alcohol dry before reconnecting. DO NOT saturate theconnector with any liquid. DO NOT use any lubricants on the connector.Warning: The FCC strictly prohibits connecting any otherantenna to the QTM-8524. Only Quatech supplied an-tennas are approved by the FCC for use with this mod-ule. Use of any other antenna will void your warranty.
30 Quatech QTM-8524 Manual3.3 Mounting External AntennasTo reduce potential radio interference to other users, the antenna type andits gain should be chosen so that the equivalent isotropically radiatedpower (EIRP) is not more than that required for successful communication.3.3.1 Mounting the QTM-24ANT-SWPlease refer to Figures 3.3.1.1 - 3.3.1.3 and follow the instructions below tomount your QTM-24ANT-SW antenna. Be sure to mount the antennaBEFORE connecting it to the QTM-8524 module. The QTM-24ANT-SWshould be professionally installed.Reference Description 1 Molded Wall/Mast Mount 2 Molded Articulating Arm 3 Molded Antenna Mount 4 #8-32 x 5/8 Machine Screw 5 #8-32 SS/Nylon Hex Nut 6 1/4-20 x 1-1/4 Machine Screw 7 1/4 SS Split Lock Washer 8 1/4 SS Flat Washer 9 1/4-20 SS Hex NutFigure 3.3.1.1 Mounting the QTM-24ANT-SW Steps 1 - 6
Quatech QTM-8524 Manual 31Figure 3.3.1.2-- Mounting the QTM-24ANT-SW Step 7(1) Route the antenna cable through the mounting plate as shown in Fig-ure 3.3.1. DO NOT snap the antenna to the mounting plate yet.(2) Secure the molded antenna mount to the mounting plate as shown inFigure 3.3.1. 1 Use the #8-32 x 5/8” machine screws and the #8-32 SS/Nylon hex nut as shown.(3) Snap the antenna into the mounting plate (dashed lines) as shown inFigure 3.3.1.1(4) Secure the articulated arm to the molded antenna mount using a1/4-20 x 1-1/4” machine screw, a 1/4” flat washer. a 1/4” lock washer,and a 1/4-20 SS hex nut as shown in Figure 3.3.1.1.(5) Secure the molded wall/mast mount to the articulating arm using a1/4-20 x 1-1/4” machine screw, a 1/4” flat washer, a 1/4” lock washer,and a 1/4-20 SS hex nut as shown in Figure 3.3.1.1.(6) Adjust the length of the cable to minimize the exposed cable loop.(7) Place the cable guard over the exposed cable and snap it in place, asshown in Figure 3.3.1.2.(8) To mount the assembly, drill four (4) 3/16” diameter (M4.75) pilot holesfor the wall anchors. Use the molded wall/mast mount as a template todrill your holes. Or, cut out the hole template provided on page 45.(9) Loosen the screws in the boom arm to adjust the antenna position.Tighten the screws when the optimum position is determined.
32 Quatech QTM-8524 Manual3.3.2 Mounting the QTM-24ANT-CSafetyThe QTM-24ANT-C antenna has been designed to attach to and hang fromstandard ceiling panel runners. To prevent personal injury or equipmentdamage, the antenna must be securely mounted per the following instruc-tions. The QTM-24ANT-C should be professionally installed.LocationThe location at which the QTM-24ANT-C is mounted is very important.Objects such as metal columns, walls, etc. will reduce efficiency. Best perfor-mance is achieved when transmit and receive antennas are mounted at thesame height, and in a direct line of sight with no obstructions. If this is notpossible, and reception is poor, it is a good idea to try a few different mount-ing positions to optimize reception.MountingThe QTM-24ANT-C is suitable for use indoors or outside. The antennabracket fits ceiling support runners 13/15” to 1-1/4” (2.1 to 3.2 cm) wide.To install the antenna, follow the steps below:(1) Loosen the 1/4-20 hex nut and position the antenna mount over thesupport runner. (See Figure 3.3.2.1).(2) Squeeze the bracket firmly onto the runner (hand-pressure is adequate)and tighten the hex nut securely as shown in Figure 3.3.2.2(3) Carefully screw the antenna onto the 1/4-20 screw (lightly hand-tighten) as shown in Figure 3.3.2.2(4) Secure coaxial cable along the support runner using tape or cable ties.If a different mount is used, limit the depth it is threaded into the mountinghole to .35 inches (.9 cm). For outdoor mounting, install the antenna with thethreaded hole down.
Quatech QTM-8524 Manual 33Figure 3.3.2.1-- Installing the QTM-24ANT-CCeiling Mount BracketFigure 3.3.2.2-- Connecting the QTM-24ANT-CAntenna to the Ceiling Mount Bracket
34 Quatech QTM-8524 Manual4. Configuration4.1 RS-232 or RS-485 ConfigurationQTM-8524 modules can be configured for either RS-232 or RS-485 serialcommunication. This setting is selected using jumper seven on the moduleas shown:(7) RS-232RS-485When connecting the QTM-8524 directly to a PC, RS-232 mode must beused. (See section 2.5.1 for instructions on how to wire the QTM-8524 forconnection to a PC.). To implement a QTM-8000 Series network using asingle pair of QTM-8524 modules, the upstream module must be configuredas RS-232 and connected to the PC’s serial port. The downstream modulesshould be configured for RS-485 in order to communicate with the QTM-8000 Series data acquisition and signal conditioning modules. When usingmultiple pairs of QTM-8524 modules in conjunction with the QTM-8520converter module, both QTM-8524s should be configured for RS-485. (Seesection 2.5.2.1 for instructions on how to wire the QTM-8524 for connectionto a QTM-8000 Series network.)4.2 Half-Duplex and Full-Duplex OperationQTM-8524 modules can operate in both Full-Duplex and Half-Duplex modes.In Half Duplex mode communication can take place in only one direction ata time. Each device can communicate information in a single direction only-- transmit or receive. If more than one module transmits data at the sameinstant, then the data on the bus will be corrupted and therefore invalid. In3.3.3 RF SafetyThe QTM-8524 has been classified by the FCC as a §15.247 Spread SpectrumMobile Transmitter. According to FCC requirements for MPE compliance, theQTM-8524 must be installed to provide a minimum distance of 2 meters from allpersons under normal use.The antennas selected for use with this transmitter were chosen to provide opti-mum safety when installed properly. Please reference Sections 3.3.3 and 3.3.2 ofthis manual before installing the antennas. Keep in mind that mounting the anten-nas higher yields a twofold benefit: better reception and less RF exposure to peoplein the general vicinity.
Quatech QTM-8524 Manual 35Note 1: In Half Duplex operation, the channel selection jumper setting neednot be used.Note 2: For a multi-point application, the network must be configured forHalf Duplex operation. Thus, QTM-8000 Series data acquisition and signalconditioning modules can not be used in this network type.4.3 Synchronous & Asynchronous CommunicationThe QTM-8524 can be jumper configured for two modes of data communica-tion-- synchronous and asynchronous. (This selection is made using jumper6, see Figure 2.4 for a diagram of QTM-8524 jumper settings.) In synchronousmode, the QTM-8524 uses an internal system clock to synchronize the databits. When the QTM-8524 is configured for synchronous communication,the PC or serial communication device to which it is attached must senddata in the format specified below:1 START BIT, 8 DATA BITS, NO PARITY, 1 STOP BITWhether receiving or transmitting, all QTM-8524 modules configured forsynchronous communication can only process data in the above format.When configured for asynchronous mode, QTM-8524 modules can processsignals in any data format. To prevent data distortion, the sampling rate anddata rate in asynchronous networks should be limited to 32 kS/s and 14.4kbps respectively.Note: QTM-8524 modules configured for asynchronous mode must also beconfigured for RS-232 communication. Thus, asynchronous mode can notbe used when the QTM-8524 is integrated into a QTM-8000 Series data ac-quisition and signal conditioning network.Half duplex mode, all modules must have the same baudrate and frequencyconfiguration and all modules must be jumper configured for slave. (SeeFigure 2.4 for a diagram of QTM-8524 jumper settings.)In Full Duplex systems, transmission and reception can occur simultaneously.For example, device A can send information to device B while at the sametime receiving data from device C. In order for the QTM-8524 modules tofunction in Full Duplex mode, the module connected to the PC or to the QTM-8520 must be jumper configured for master, and the downstream QTM-8524must be jumper configured for slave mode. Both modules must be set to thesame baudrate, frequency and channel. When using QTM-8524 moduleswith QTM-8000 Series I/O modules, Full Duplex mode must be used.
36 Quatech QTM-8524 Manual4.4 Configuration ModesMode 1 : FULL DUPLEX, SYNCHRONOUSPeer-to-peer communicationOne QTM-8524 configured for MASTEROne QTM-8524 configured for SLAVE.Maximum Baudrate: 19200 bpsFixed Data Format: 1 Start Bit, 8 Data Bits, No Parity, 1 Stop BitCompatible with QTM-8000 Series I/O NetworksMode 2 : HALF DUPLEX, SYNCHRONOUSMultiple Node CommunicationAll Slave ConfigurationMaximum Baudrate: 57600 bpsFixed Data Format: 1 Start Bit, 8 Data Bits, No Parity, 1 Stop BitTime Delay between transmit and receiveChannel Selection: DisabledNot Compatible with QTM-8000 Series I/O NetworksMode 3 : FULL DUPLEX, ASYNCHRONOUSPeer to Peer CommunicationOne QTM-8524 configured for MASTEROne QTM-8524 configured for SLAVEMaximum Baudrate: 14400 bpsVariable Data FormatInterface: RS-232 ONLYNot compatible with QTM-8000 Series I/O Networks
Quatech QTM-8524 Manual 374.4.1 Mode 1: Full Duplex, SynchronousMode 1 is the most common form of peer-to-peer communication. In this mode, amodule first encodes the input data streams. Then, it transmits the data to thedownstream QTM-8524 module. The receiving module decodes the data streamand drives the data onto the serial communication lines.In Mode 1, the QTM-8524 modules are configured for full duplex mode and syn-chronous communication. As mentioned in the previous section, both modulesmust be configured for the same baud rate, frequency and channel. Note also thatthe data must be transmitted using the predefined synchronous data format (seesection 4.3).Jumper Configuration:1. Select Channel from C0 - C7 (Jumper 1)2. Select Frequency from 2426.112 - 2458.26 MHz (Jumper 2)3. Select Baud Rate from 600 bps to 19200 bps (Jumper 3)4. Select Full Duplex Mode (Jumper 4)5. Select Master or Slave (Jumper 5)6. Select Synchronous Communication (Jumper 6)7. Select RS-232 or RS-485 (Jumper 7)(See Figure 2.4 for a diagram of QTM-8524 jumper settings.)Advantages:1. Decreases communication error rate2. Increases communication stability3. Can be used with QTM-8000 Series I/O modulesLimitations:1. Fixed data format2. Peer-to-peer communication3. Maximum baudrate: 19200 bpsNote: When QTM-8524 modules are used in Mode 1with QTM-8000 Series I/O modules, the upstream QTM-8524 connected to the PC should be configured for RS-232 communication and set to Master mode, the down-stream QTM-8524 should be configured for RS-485 com-munication and set to Slave mode.
38 Quatech QTM-8524 Manual4.4.2 Mode 2: Half-Duplex, SynchronousMode 2 enables communication between two or more QTM-8524 modules.This allows a single QTM-8524 connected to a PC to communicate withmultiple other remote QTM-8524 modules also connected to PCs or PLCs. Inmode 2, a single QTM-8524 modules broadcasts signals to every other QTM-8524 module in the network. These modules receive the information, inter-pret the data, and respond accordingly. Mode 2 requires all modules to be configured for half-duplex synchronouscommunication. In a half-duplex system all QTM-8524 modules are jumperconfigured for Slave State, and all must be configured for the same frequencyand baud rate. As in Mode 1, the synchronous network requires that data beconfigured using the predefined data format noted in section 3.2.Jumper Configuration:1. No Channel Selection2. Select Frequency from 2426.112 - 2458.26 MHz (Jumper 2)3. Select Baud Rate from 600 bps to 57600 bps (Jumper 3)4. Select Half Duplex Mode (Jumper 4)5. Select Slave State (Jumper 5)6. Select Synchronous Communication (Jumper 6)7. Select RS-232 or RS-485 (Jumper 7)(See Figure 2.4 for a diagram of QTM-8524 jumper settings.)Advantages:1. Decreases communication error rate2. Increases communication stabilityLimitations:1. Fixed data format2. Half-Duplex Only3. Cannot be used with QTM-8000 Series I/O Modules
Quatech QTM-8524 Manual 394.4.3 Mode 3: Full Duplex, AsynchronousUsing Mode 3, QTM-8524 modules can be used to transmit data in anyformat. In Mode 3, only point-to-point communication is permitted. BothQTM-8524 modules must be configured for full-duplex mode and RS-232communication, and must share the same frequency. In this mode channelselection is ignored and baud rate need not be synchronized. However,baud rate must be kept under 14.4 kbps. This is because data waveformsmay be distorted using data ratesgreater than 14.4 kbps. The controllingappliation must handle all desired synchronizing and error correction duties.Jumper Configuration:1. No Channel Selection2. Select Frequency from 2426.112 - 2458.26 MHz (Jumper 2)3. No baud rate selection4. Select Full Duplex Mode (Jumper 4)5. Set one QTM-8524 to Master and one to Slave (Jumper 5)6. Select Asynchronous Communication (Jumper 6)7. Select RS-232 (Jumper 7)(See Figure 2.5 for a diagram of QTM-8524 jumper settings.)Advantages:1. Full duplex communication2. Variable data formatsLimitations:1. Peer-to-peer communication2. Maximum Baud Rate: 14.4 kbps3. RS-232 Communication only4. Cannot be used with QTM-8000 Series I/O Modules
40 Quatech QTM-8524 Manual5. Application Examples5.1 Peer-to-Peer Communication (Mode 1)Figure 5.1 above depicts a basic serial full-duplex communication applica-tion. In this type of application, both QTM-8524 modules are configuredfor the same baud rate, frequency and channel. RS-232 RS-232QTM-8524 QTM-8524QTM-8524 Configuration:Interface: RS-232Full DuplexSynchronousMasterBaudrate: 19200 bps MAXChannel: 1QTM-8524 Configuration:Interface: RS-232Full DuplexSynchronousSlaveBaudrate: 19200 bps MAXChannel: 1Figure 5.1-- Peer-to-Peer Communication
Quatech QTM-8524 Manual 415.2 Interfacing with QTM-8000 Modules (Mode 1) RS-232RS-485QTM-8524 QTM-8524QTM-8524 Configuration:Interface: RS-232Full DuplexSynchronousMasterBaudrate: 19200 bps MAXChannel: 1QTM-8524 Configuration:Interface: RS-485Full DuplexSynchronousSlaveBaudrate: 19200 bps MAXChannel: 1Figure 5.2--QTM-8524 as part of a QTM-8000 SeriesData Acquisition and Signal Conditioning NetworkQTM-8000 SeriesFigure 5.2 above depicts QTM-8000 Series data acquisition and signal con-ditioning modules integrated into a wireless network. The upstream QTM-8524 connected to the PC should be set for RS-232 communication, the down-stream QTM-8524 connected to the module network should be set for RS-485. Both QTM-8524 modules must be configured for the same frequency,channel and baud rate. The attached QTM-8000 Series I/O modules mustalso be configured at that same baud rate. (Note that because of the speedlimitation imposed by the QTM-8524, communication over this network cannot exceed 19.2 kbps, even though QTM-8000 Series I/O Modules are them-selves capable of speeds up to 115.2 kbps.) Up to 256 QTM-8000 I/O mod-ules can be configured in a network using one pair of QTM-8524 modules.
42 Quatech QTM-8524 Manual5.3 Multiple PC Communication (Mode 2) RS-232QTM-8524RS-232RS-232QTM-8524QTM-8524QTM-8524 Configuration:(All Modules)Interface: RS-232Half DuplexSynchronousSlaveBaudrate: 57600 bps MAXFigure 5.3--QTM-8524 modules used to network multiple PCsFigure 5.3 above depicts a basic multi-point application. Inthis type of application, multiple QTM-8524 modules canoperate in a single wireless network. All modules must beconfigured to Half-Duplex communication and must be setin Slave State. Either RS-232 or RS-485 must be selected forthe entire network. All modules must also be configured tooperate at the same baud rate, channel and frequency. Notethat this mode cannot be used with QTM-8000 Series dataacquisition and signal conditioning modules.
Quatech QTM-8524 Manual 435.4 Asynchronous Communication (Mode 3) RS-232 RS-232QTM-8524 QTM-8524 PLCQTM-8524 Configuration:Interface: RS-232Full DuplexAsynchronousMasterBaudrate: up to 14.4 kbpsQTM-8524 Configuration:Interface: RS-232Full DuplexAsynchronousSlaveBaudrate: up to 14.4 kbpsFigure 5.4--QTM-8524 modules in an asynchronous networkFigure 5.4 above depicts a basic asynchronous communica-tion application. In this type of application, both QTM-8524modules must be configured for Full-Duplex RS-232 commu-nication, and they must operate at the same frequency. Baudrate need not be the same for both modules, however it mustbe less than 14.4 kbps. Note that asynchronous mode can notbe used with QTM-8000 Series I/O Modules.
44 Quatech QTM-8524 ManualFCC ApprovalsThe QTM-8524 is approved pursuant to FCC Part 15.247 for intentionalspread spectrum radiators (47CFR15.247) while being used with the Quat-ech supplied antennas (QTM-24ANT-SW and the QTM-24ANT-C). Thiscertification is applicable in the United States and all of its territories (Guam,Samoa America, US Virgin Islands and Puerto Rico).FCC ID: F4AQTM85242000The QTM-8524 is approved pursuant to FCC Part 15 Subpart B limits forunintentional radiators. Operation is subject to the following two condi-tions: (1) this device may not cause interference, and (2) this device mustaccept any interference, including interference that may cause undesiredoperation of the device.This equipment has been tested and found to comply with the limits for aClass B digital device, pursuant to Part 15 of the FCC Rules. These limits aredesigned to provide reasonable protection against harmful interference in aresidential installation. This equipment generates, uses and can radiate ra-dio frequency energy and, if not installed and used in accordance with theinstructions, may cause harmful interference to radio communications. How-ever, there is no guarantee that interference will not occur in a particularinstallation. If this equipment does cause harmful interference to radio ortelevision reception, which can be determined by turning the equipment offand on, the user is encouraged to try to correct the interference by one or moreof the following measures:— Reorient or relocate the receiving antenna.— Increase the separation between the equipment and receiver.— Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.— Consult the dealer or an experienced radio/TV technician for help.Additional AntennasOperation of this device with antennas that are not supplied by Quatech isstrictly prohibited under FCC regulations. Operation with antennas thatare non-compliant will void any warrantee whether explicit or implied.6. Approvals
Quatech QTM-8524 Manual 45DOC Approvals (Canada)The QTM-8524 is approved for use in accordance with RSS-210 and RSS-139. To prevent radio interference to the licensed service, this device is in-tended to be operated indoors and away from windows to provide maxi-mum shielding. Equipment (or its transmit antenna) that is installed out-doors is subject to licensing.CANXXXXXXXXXXXAdditional AntennasThis device has been designed for use with an antenna having a maximumgain of 7.5dB. Antennas having higher gain is strictly prohibited per regula-tions of Industry Canada. The required antenna impedance is 50 ohms.Quatech Inc. will not be responsible or liable for systems or damage causedby systems operated with unapproved antennas, and such operation willvoid all warrantees whether explicit or implied.
46 Quatech QTM-8524 ManualCut this template out of the manual and use it as a guide fordrilling the holes needed to install your QTM-24ANT-SW wall-mount antenna.QTM-24ANT-SW Hole Template

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