Connects to a wide range of radio equipment - including trunked with MAP27
Choice of protocol modes to suit individual applications
Apparent full-duplex operation over half-duplex radio equipment
Compatible with MPT1379 (trunking) and ETS 300.113 (PMR)
Compatible with other Thorcom RLC series FFSK modems
Introduction
The RLC220 is a microprocessor based packet radio controller, or radio modem, which allows the transmission of data over a voice-grade radio channel such as those provided by Private Mobile Radio (PMR), Trunked PMR (PAMR), Marine Band, telemetry band or military radio.
Data can be transmitted error-free between locations at 1200 or 2400bps using Fast Frequency Shift Keying (FFSK).
Applications
The RLC220 is flexible general purpose radio modem that is suitable for a wide range of applications, including the following:
Mobile data for fleet dispatch (couriers, taxis, etc.)
Mobile data for Emergency Services (Police, Fire, Ambulance)
Data and file transfer on conventional PMR channels
Data and file transfer on trunked radio systems
Navigation Systems; transmission of differential correction data
Access to data loggers and data recorders
Wide area networking, for example: TCP/IP over radio
Telemetry and SCADA product variants
The RLC220 radio-modem is available in three product variants which have been optimised to suit particular applications. Each modem variant has different operating firmware suitable for use on MPT1327 networks, ETS 300.113 conventional PMR systems, or transparent ‘protocol-less’ for use in telemetry and SCADA applications. Click here for further information on RLC220 product variants.
Applications
Job despatch
ETS300.230 Data
MPT1327 Data
Telemetry
Simple NMEA AVL
Markets
Emergency Services
Public Utilities
Logisitcs Operators
Telemetry
Wide Area networking
Modulation
1200 bps FFSK
2400 bps FFSK
Interface Protocols
Hayes-ATTM command
RMIP interface
Transparent
AX.25
Technical Specifications
Processor & Memory
CPU
Zilog Z80181 Smart Access Controller
(SAC) operating at 9.216MHz
1200/ 2400/ 4800bps Fast Frequency Shift Keying (FFSK)
Recognised in ETS-300.113 as MM12, MM24 and MM48 modulation schemes
Signalling Format
ETS-300.230 with FEC and Thorcom extensions
Channel Access
MPT1379 or ETS-300.471
Connector
9-way D-type male connector
Transmit signal
Adjustable 0-2V pk-pk, 600ohm source impedance
Receive signal
Adjustable 10mV to 4V pk-pk, 47K input impedance
Press to talk output
Open collector (FET) Imax = 50mA
External channel busy input
TTL/CMOS compatible logic level (polarity selectable by jumper)
Serial ports
Port #1
RS232 serial port (DCE) on 25-way D-type for user equipment (mobile data terminal, etc.) with TXD, RTD, DTS, RTS, DSR, DCD and DTR connections.
Port #2
RS232, TTL or Inverted-TTL signal levels (selected by jumper) 3-wire circuit (TXD, RXD and GND) for use with MAP27 radio transceivers, GPS receivers or secondary data devices. Supported speeds: 300, 600, 1200, 2400, 4800, 9600 and 19200 baud (software selectable)
Flow Control
XON/XOFF or CTS/RTS option (CTS/RTS only with RMIP user interface)
User Interface Options
MPT1327 trunking
Hayestm AT command set for trunking radio
Conventional PMR
Radio Modem Interface Protocol (RMIP)
Protocol -less
Transparent protocol
Power Supply
Switch Mode PSU
Software controllable "auto power off" to conserve vehicle battery. Configurable "auto power on" with vehicle ignition (or alarm input)
Operating voltage
9.0-35.0 volts (operates directly from 12V and 24V vehicle supplies)
