Siemens 3RQ31181AB00 Coupler with Relay Output

Product Description

The SIEMENS 3RQ31181AB00 is a coupler with relay output designed for use in industrial control and automation systems. This device serves as an interface component, isolating and transmitting control signals between circuit segments through a built-in relay output stage. It is compact in form, measuring 3.228 inches long, 0.315 inches wide, and 3.858 inches tall, and weighs just 0.077 pounds. Licensed electricians and industrial controls technicians typically specify and install this component in panel builds and machine control assemblies where signal isolation and relay switching are required.

The 3RQ31181AB00 is suited for industrial automation environments where control signals must be coupled and switched reliably across circuit boundaries. Typical applications include PLC output interfacing, machine control panels, and process automation equipment. The relay output configuration makes it appropriate for scenarios where a dry-contact or switched output is needed downstream of a logic or low-voltage control signal.

Key Features

• Integrated relay output stage for signal coupling and switching
• Compact footprint at 3.228 x 0.315 x 3.858 inches for space-constrained panel installations
• Lightweight construction at 0.077 pounds
• Sold individually — 1 per pack
• Provides electrical isolation between input control signal and output relay circuit

Compatibility

Designed as an OEM-style coupler with relay output for use in Siemens industrial control and automation panel assemblies where compatible relay coupler modules are specified.

Installation Notes

Installation should be performed by a qualified electrician or industrial controls technician in accordance with applicable NEC requirements and the panel or equipment manufacturer's documentation. De-energize and lock out the control panel before installing or removing this module. Verify that input signal voltage and relay output ratings are compatible with the connected circuits before restoring power. Do not exceed the rated electrical parameters of the relay output.

Technical Specifications

• Length: 3.228 inches
• Width: 0.315 inches
• Height: 3.858 inches
• Weight: 0.077 pounds
• Quantity: 1 per pack
• UPC: 80476621642

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3RQ31181AB00