TR-36B - Industrial Networking Solutions – Industrial Ethernet Switches and Routers



The TR-36B is an industrial rack based modem designed to allow cost effective and simple remote access to legacy serial industrial equipment. The AT command driven modem is capable of synchronising with a wide range of traditional modem negotiation standards providing data rates up to 33.6 kbit/s over both PSTN and 2- or 4-wire lease line circuits.

Designed to be mounted in the RV-07B rack in industrial locations these modems can operate in extremes of temperature and electromagnetic field. The complete galvanic separation of all interfaces ensures earth loops and transients do not interfere with communication. Up to 16 TR-36B modems can be mounted in one rack.

Firewalls are not an issue as data does not use the Internet and with call back security it is impossible for either accidental or deliberate access to any equipment attached to the modem. To provide resilience a second line interface allows a PSTN connection to be established in the event of a lease line failure.

The modem is also simple to configure using the Westermo TD-tool software; standard commands can easily be entered, and saved configurations downloaded. RS-232 connections can be made using screw connections as well as the standard D-sub. The modem is designed to be connected to devices with no ability to control dialling so special functions like data dialling and DTR dialling are provided to enable these devices to automatically establish connection.


• Power
Operating voltage 10 to 60 VDC
Rated current 130 mA @ 12 VDC
63 mA @24 VDC
40 mA @48 VDC
• Interfaces
Interface Connected to rack RV-07B
• Temperature
Operating –40 to +70°C (–40 to +158°F)
Storage and transport –40 to +70°C (–40 to +158°F)
• EMC specification
EN 55024 Immunity IT equipment
EN 61000-6-2 Immunity industrial environments
EN 61000-6-4 Emission industrial environments
FCC Part 15 Class A
EN 50121-4 Railway signalling and telecommunications apparatus
IEC 62236-4 Railway signalling and telecommunications apparatus
• Safety
Safety UL/IEC/EN 60950-1, IT equipment
PSTN ETSI TS103 021-1, ETSI TS103 021-2, ETSI TS103 021-3

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