---
lang: "en"
title: "TCW122B-RR Remote Relay Control Module"
sku: "TCW122B-RR"
canonical_url: "https://shop.marcomweb.it/en/remote-io/tcw122b-rr-remote-relay-control-module"
brand: "MARCOM S.r.l."
end_of_life: "false"
---

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TCW122B-RR Remote Relay Control Module. Ethernet remote relay control module for industrial automation.

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

To organize remote relay control, two devices should work in a pair: one in "client" mode and the other in "server" mode.

The "Client" periodically sends the status of its digital inputs to the "Server". In response, the "Server" returns the status of its digital inputs.

The client-server model allows for the following variants:

- both devices are connected to the Internet, with public IP addresses;
- both devices are connected to a LAN, with private IP addresses;
- "Client" is connected to the LAN (private IP address) and "Server" is connected to the Internet (public IP address);
- "Client" is connected to the LAN and "Server" is connected to a different LAN, but behind a router with a public IP address and port forwarding.

## Technical Specifications

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

## Applications

- Remote relay control - one or two ways;
- Industrial process automation;
- Home and office alarm systems;
- Remote control of electrical devices.

---

Source: https://shop.marcomweb.it/en/remote-io/tcw122b-rr-remote-relay-control-module

MARCOM S.r.l. — a trusted supplier for industrial automation and building automation.