Remote relay control module TCW122B-WD


Model TCW122B-WD Remote Relay Control

Bi-directional remote relay control with client–server model for industrial automation.

Short Description

The TCW122B-RR is a remote relay control module that has two digital inputs and two relay outputs, with normally open and normally closed contacts.

To arrange remote relay control two devices should work as a pair – one in “client” mode and other in “server” mode.

The “Client” sends periodically the status of its digital inputs to “Server”. As an answer, the “Server” returns its digital inputs status.

The client-server model allows the following variations
* both devices are connected to the Internet, with public IP addresses
* both devices are connected to one LAN, with private IP addresses
* “Client” is connected to LAN (private IP address) and “Server” is connected to the Internet (public IP address)
* “Client” is connected to LAN and “Server” is connected to different LAN, but behind a router with public IP address and port forwarding


* Password protected web-based configuration
* 2 digital inputs with “dry contact” and “logic level” mode
* 2 relay outputs with NO and NC contacts
* Removable terminal connectors – separated for inputs and outputs
* Encrypted communication
* Manual or DHCP network configuration
* Device ID filtering
* Remote FTP firmware update

Technical Parameters

Supply voltage, 12 ± 2 VDC
Maximum current (with all relays ON), 370 mA
Weight, 110 g
Dimensions, mm 107 x 72 x 32
Operating temperature, 0 to +40 °C
Maximum humidity in 0 to 31°C range, 80 %RH
Maximum humidity at 40°C (linear slope between 31-4°C), 50%RH
Minimum high level input voltage for digital inputs, +2.5 VDC
Maximum low level input voltage for digital inputs, +0.8 VDC
Maximum input voltage for digital inputs, +5.5 VDC
Maximum switchable current for relay contacts, 3 Amp.
Maximum switchable voltage for relay contacts, 30/24 VAC/VDC

Warranty period: 3 years

Power Supply: 12V 500mA UL-Listed Power Adapter, 100 - 240VAC to 12 VDC, .5A
If a power supply is needed please order Model 18964 with the TCW122-WD.

Click here for Example application:

Click here for product manual.

Please click below for complete product information at Teracom.

  • Model: TCW122B-WD
  • Shipping Weight: 1lbs
  • Manufactured by: Teracom