Summary of Contents for Quatech QTM-8524
- Page 1 QTM-8524 2.4 GHz RF Radio Modem Module Users Manual WIRELESS MODEM MODULE FOR QTM-8000 SERIES SYSTEMS QUATECH, Inc. TEL: (330) 434-3154 662 Wolf Ledges Pkwy FAX: (330) 434-1409 Akron, Ohio 44311 http://www.quatech.com...
- Page 2 QTM-8524 User’s Manual Revision 1.0...
- Page 3 Warranty Information Quatech 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 any system component that fails to perform under normal operating conditions in accordance with the procedures outlined in this document, provided the failure occurs during the one year warranty period.
- Page 4 Notice The information contained in this document cannot be reproduced in any form without the written consent of Quatech Inc. Any software programs accompanying this document can be used only in accordance with any licensing agreement(s) between the purchaser and Quatech Inc. Quatech Inc. reserves the right to change this documentation or the product to which it refers at any time and without notice.
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Page 5: Table Of Contents
2.2 QTM-8524 Module Specifications 2.3 QTM-8524 Block Diagram 2.4 QTM-8524 Disassembly 2.5 QTM-8524 Jumper Settings 2.6 QTM-8524 Basic Wire Connections 2.6.1 RS-232 Connection Between PC and QTM-8524 2.6.2 Connecting QTM-8000 Modules to the QTM-8524 3. Antennas 3.1 QTM-8524 Antenna Options 3.1.1 QTM-24ANT-SW Specifications 3.1.2 QTM-24ANT-C Specifications... - Page 6 4. Configuration 4.1 RS-232 or RS-485 Configuration 4.2 Half-Duplex and Full-Duplex Operation 4.3 Synchronous and Asynchronous Communication 4.4 Configuration Modes 4.4.1 Mode 1: Full-Duplex, Synchronous 4.4.2 Mode 2: Half-Duplex, Synchronous 4.4.3 Mode 3: Full-Duplex, Asynchronous 5. Application Examples 5.1 Peer-to-Peer Communication (Mode 1) 5.2 Interfacing with QTM-8000 Modules (Mode 1) 5.3 Multiple PC Communication (Mode 2) 5.4 Asynchronous Communication (Mode 3)
- Page 7 3.3.2.1 Installing the QTM-24ANT-C Ceiling Mount Bracket 3.3.2.2 Connecting the QTM-24ANT-C Antenna to the Bracket QTM-8524 Peer-to-Peer Communication QTM-8524 as part of a QTM-8000 Series I/O Network QTM-8524 Modules Used to Network Multiple PCs QTM-8524 Modules in an Asynchronous Network...
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Page 8: Introduction
This flexibility makes a QTM-8000 Series network an extremely cost effective solution for remote signal monitoring and control. The QTM-8524 is a radio modem module that can implement QTM-8000 Series modules as a wireless data acquisition and signal conditioning network. The wireless communication modules form RF communication between peer-to-peer or multi-point structures, which eliminates the use of long cables. -
Page 9: Available Qtm-8000 Series Modules
QTM-8014D: 1 analog input, 1 digital input, 2 digital outputs, with LED display. QTM-8017: 8 channel analog input module QTM-8018: 8 channel thermocouple input module Timer/Counter Modules: QTM-8080D: 2 independent 32-bit counters, 2 digital output channels 5 Hz to 50kHz frequency measurement range Quatech QTM-8524 Manual... -
Page 10: Qtm-8000 Series Common Features
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 Quatech QTM-8524 Manual... -
Page 11: Qtm-8000 Series Wireless Networks
1.3 QTM-8000 Series Wireless Networks Figure 1.3--QTM-8000 Series Network with multiple baud rates and multiple data formats Quatech QTM-8524 Manual... -
Page 12: Disadvantages Of Conventional Two-Wire Rs-485 Networks
For wireless networks, the QTM-8524 can convert and control the RS-485 network. However, a single baud rate, channel, and frequency must be jumper selected for each module pair. This means that if a QTM-8524 is connected directly to the computer’s serial port, the network can only function at a single baud rate. - Page 13 Quatech QTM-8524 Manual...
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Page 14: Operation Principle
1.3.3 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 into a RS-485 signal or a RF signal respectively. (3) All modules connected to the RS-485 network will simultaneously receive this command. -
Page 15: Supporting Multiple Baud Rates
In order to support multiple baud rates in a wireless network, the QTM-8520 must be used to auto tune the network and pairs of QTM-8524 RF modules are jumper configured to match the specific baud rate at which downstream modules are operating. -
Page 16: Qtm-8000 Series Module Dimensions
QTM-8000 Series Module Dimensions FRONT VIEW SIDE VIEW Figure 1.4.1--QTM-8000 Series Front, Side, Rear, and Top Views Quatech QTM-8524 Manual... -
Page 17: Qtm-8000 Series Din Rail Mounting
Figure 1.4.2--QTM-8000 Series Din Rail Mounting Quatech QTM-8524 Manual... -
Page 18: Qtm-8000 Series Panel Mounting
Plastic Part for Panel Mount Figure 1.4.3--QTM-8000 Series Panel Mounting Quatech QTM-8524 Manual... -
Page 19: Qtm-8524 Specifications
2. QTM-8524 Specifications Pin Assignments QTM-8524 Wireless RF Modem Frequency Range: 2.4 GHz Channel Spacing: 2 MHz RF Power Output: 0.707W Interface: RS-232/RS-485 (RS-485) (R)+Vs (G)D- (Y)D+ Power Computer Quatech QTM-8524 Manual... -
Page 20: Qtm-8524 Module Specifications
QTM-8524 Module Specifications QTM-8524: 2.4 GHz RS-232/RS-485 to RF Converter RF Communication Transceiver Frequency Band: 2426 to 2458 MHz Channel Spacing: 2.048 MHz (8 Channels jumper select) Peak Output Power: 28.5 dBm ±2 dB (.707 watts) Modulation: Gaussian Minimum Shift Keying (GMSK) -
Page 21: Qtm-8524 Block Diagram
QTM-8524 Figure 2.3--QTM-8524 Block Diagram QTM-8524 Disassembly Disassembly of the QTM-8524 is required to change the jumper settings. Please refer to figure 2.4 and follow the steps below to disassemble the module: 1. Remove the DIN rail mounting bracket by loosening the screws on the front of the unit. -
Page 22: Disassembling The Qtm-8524
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 disassembly Remove for disassembly REAR VIEW Figure 2.4--Disassembling the QTM-8524 Quatech QTM-8524 Manual... -
Page 23: Qtm-8524 Jumper Settings
Synchronous Communication Figure 2.5 on the following page diagrams the other possible jumper set- tings. See section 4 for more information about how QTM-8524 modules should be configured for different types of QTM-8000 wireless networks. Note that the QTM-8524 must be disassambled before jumper settings can be changed. -
Page 24: Qtm-8524 Jumper Settings
Channel3 2439.936 MHz 4800 bps Channel4 2444.544 MHz 9600 bps Channel5 2449.152 MHz 19200 bps Channel6 2453.760 MHz 38400 bps Channel7 2458.368MHz 57600 bps Full-Duplex Half-Duplex Slave Master Synchronous QTM-8524 Asynchronous RS-232 RS-485 Figure 2.5.--QTM-8524 Jumper Settings Quatech QTM-8524 Manual... -
Page 25: Qtm-8524 Basic Wire Connections
QTM-8524 Basic Wire Connections 2.6.1 RS-232 connection between PC and QTM-8524 The QTM-8524 includes a cable that will allow you to connect your wireless module directly to a PC. One end of the cable provides a standard D-9 connector that plugs into a computer’s standard serial port. The other end has exposed wires used for connecting with the QTM-8524. -
Page 26: Antennas
3. Antennas QTM-8524 Antenna Options Two 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. -
Page 27: Qtm-24Ant-C Specifications
Nominal Impedance: 50 Ohms VSWR: 1.5:1 nominal Transmission Range: 500 Meters, open line-of-sight (50M with barriers) Radiating Element: Plated copper laminate Enclosure: Polycarbonate Application: Office/lab, drop ceiling, transmission Included Accessories: cable, hardware and connector Figure 3.1.2--QTM-24ANT-C Transmission Pattern Quatech QTM-8524 Manual... -
Page 28: Connecting Antennas To Qtm-8524 Modules
Connecting Antennas to QTM-8524 Modules Your QTM-8524 is issued with a high quality communication antenna. To get the maximum performance form your wireless system, please follow the directions and suggestions that follow. 3.2.1 Site Selection Antenna location is extremely important when installing your system. If possible, try to keep the antenna away from any obstructions. -
Page 29: Mounting External Antennas
3.3.1 Mounting the QTM-24ANT-SW Please refer to Figures 3.3.1.1 - 3.3.1.3 and follow the instructions below to mount your QTM-24ANT-SW antenna. Be sure to mount the antenna BEFORE connecting it to the QTM-8524 module. The QTM-24ANT-SW should be professionally installed. Reference... -
Page 30: Mounting The Qtm-24Ant-Sw Step
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. Figure 3.3.1.2-- Mounting the QTM-24ANT-SW Step 7 Quatech QTM-8524 Manual... -
Page 31: Mounting The Qtm-24Ant-C
(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 mounting hole to .35 inches (.9 cm). For outdoor mounting, install the antenna with the threaded hole down. Quatech QTM-8524 Manual... -
Page 32: Installing The Qtm-24Ant-C Ceiling Mount Bracket
Figure 3.3.2.1-- Installing the QTM-24ANT-C Ceiling Mount Bracket Figure 3.3.2.2-- Connecting the QTM-24ANT-C Antenna to the Ceiling Mount Bracket Quatech QTM-8524 Manual... -
Page 33: Rf Safety
The QTM-8524 has been classified by the FCC as a §15.247 Spread Spectrum Mobile Transmitter. According to FCC requirements for MPE compliance, the QTM-8524 must be installed to provide a minimum distance of 2 meters from all persons under normal use. -
Page 34: Synchronous And Asynchronous Communication
For example, device A can send information to device B while at the same time receiving data from device C. In order for the QTM-8524 modules to function 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-8524 must be jumper configured for slave mode. -
Page 35: Configuration Modes
Configuration Modes Mode 1 : FULL DUPLEX, SYNCHRONOUS Peer-to-peer communication One QTM-8524 configured for MASTER One QTM-8524 configured for SLAVE. Maximum Baudrate: 19200 bps Fixed Data Format: 1 Start Bit, 8 Data Bits, No Parity, 1 Stop Bit Compatible with QTM-8000 Series I/O Networks... -
Page 36: Mode 1: Full-Duplex, Synchronous
QTM-8524 module. The receiving module decodes the data stream and 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 modules must be configured for the same baud rate, frequency and channel. -
Page 37: Mode 2: Half-Duplex, Synchronous
4.4.2 Mode 2: Half-Duplex, Synchronous Mode 2 enables communication between two or more QTM-8524 modules. This allows a single QTM-8524 connected to a PC to communicate with multiple other remote QTM-8524 modules also connected to PCs or PLCs. In mode 2, a single QTM-8524 modules broadcasts signals to every other QTM- 8524 module in the network. -
Page 38: Mode 3: Full-Duplex, Asynchronous
4.4.3 Mode 3: Full Duplex, Asynchronous Using Mode 3, QTM-8524 modules can be used to transmit data in any format. In Mode 3, only point-to-point communication is permitted. Both QTM-8524 modules must be configured for full-duplex mode and RS-232 communication, and must share the same frequency. In this mode channel selection is ignored and baud rate need not be synchronized. -
Page 39: Application Examples
Channel: 1 Channel: 1 Figure 5.1-- Peer-to-Peer Communication Figure 5.1 above depicts a basic serial full-duplex communication applica- tion. In this type of application, both QTM-8524 modules are configured for the same baud rate, frequency and channel. Quatech QTM-8524 Manual... -
Page 40: Interfacing With Qtm-8000 Modules (Mode 1)
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. Quatech QTM-8524 Manual... -
Page 41: Multiple Pc Communication (Mode 2)
Synchronous Slave Baudrate: 57600 bps MAX Figure 5.3--QTM-8524 modules used to network multiple PCs Figure 5.3 above depicts a basic multi-point application. In this type of application, multiple QTM-8524 modules can operate in a single wireless network. All modules must be configured to Half-Duplex communication and must be set in Slave State. -
Page 42: Asynchronous Communication (Mode 3)
Figure 5.4--QTM-8524 modules in an asynchronous network Figure 5.4 above depicts a basic asynchronous communica- tion application. In this type of application, both QTM-8524 modules must be configured for Full-Duplex RS-232 commu- nication, and they must operate at the same frequency. Baud rate need not be the same for both modules, however it must be less than 14.4 kbps. -
Page 43: Approvals
Samoa America, US Virgin Islands and Puerto Rico). FCC ID: F4AQTM85242000 The QTM-8524 is approved pursuant to FCC Part 15 Subpart B limits for unintentional radiators. Operation is subject to the following two condi- tions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. - Page 44 DOC 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.
- Page 45 QTM-24ANT-SW Hole Template Cut this template out of the manual and use it as a guide for drilling the holes needed to install your QTM-24ANT-SW wall- mount antenna. Quatech QTM-8524 Manual...