Ethernet digital IO module TCW181B-CM


Model Ethernet digital IO module TCW181B-CM

HTTP API and SNMP v1 support for data acquisition (SNMP manager) software applications.

The TCW181B-CM is 8-channel Ethernet digital IO module. The device is manageable by WEB interface, SNMP programs or user application over HTTP/XML API commands. It can be used as a stand-alone device or as a part of control and monitoring systems.

The IO module TCW181B-CM has eight relays with normally open and normally closed contacts for up to 3 Amperes either AC or DC current. All eight relays of the device can be activated independently or simultaneously.

Supported M2M protocol – SNMP v.1 makes the TCW181B-CM good choice for controlling systems with SNMP manager software.

Ethernet digital IO module supports one digital input, which can work either in “dry contact” or “logic level” mode. The mode is hardware settable by jumper, close to the input.

Every change of status of the input can generate an e-mail or SNMP trap if this function is enabled.


• 10 Mb Ethernet connectivity;
• Password protected web based configuration and control;
• 1 digital input with "logic level" and "dry contact" modes;
• 8 relays with NO and NC contacts;
• SNMP v.1 support;
• Sending SNMP Traps messages under certain conditions;
• Sending E-mail messages under certain conditions;
• SMTP with authorization (SSL is not supported);
• HTTP and SNMP port changing;
• HTTP and XML API commands;

Technical Parameters

Supply voltage, 12 ± 2 VDC
Maximum current (with all relays ON), 370 mA
Weight, 205 g
Dimensions, mm 115 x 90 x 40
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

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  • Model: TCW181B
  • Manufactured by: Teracom