Unitronics URD-0400B UniStream Remote I/O digital input module featuring 4 AC digital inputs for 120 VAC industrial automation and distributed control applications.
£89.25
The Unitronics URD-0400B is a compact UniStream® Remote I/O digital input module designed for reliable monitoring of industrial AC control signals within distributed automation systems. As part of the Unitronics UniStream Remote I/O platform, the module provides four digital inputs specifically designed for 120 VAC nominal signals, making it ideal for industrial machinery, control panels and process automation applications.
Designed for machine builders and automation engineers, the URD-0400B enables flexible remote signal acquisition while reducing wiring complexity. Its slim DIN rail-mounted construction allows efficient use of panel space while maintaining dependable performance in demanding industrial environments.
With 4 digital inputs, 85-132 VAC operating range and integrated Ethernet Remote I/O compatibility, the URD-0400B is suitable for monitoring switches, relays, contactors and other industrial control devices throughout distributed automation networks.
The URD-0400B enables automation engineers to position input acquisition closer to field devices, reducing wiring requirements and simplifying machine installation. Through the UniStream Remote I/O platform, users can create scalable Ethernet-based control systems with centralised PLC management and distributed signal monitoring.
Its dedicated AC input design makes the module particularly suitable for monitoring industrial control voltages, relay contacts and machine status signals while maintaining reliable operation in demanding production environments.
| Voltage | 32 V |
|---|---|
| IP Rating | IP20 |
| Series | UniStream Remote I/O |
| Product type | Digital input module |
| Number of inputs | 4 |
| Input type | AC digital inputs |
| Input voltage | 120 VAC nominal |
| Operating range | 85-132 VAC |
| Input current | 7.5 mA maximum per point @ 120 VAC |
| Input impedance | 17.5 kΩ typical |
| Response time | 30 ms OFF→ON, 130 ms ON→OFF |
| Isolation | Photocoupler isolation |
| Field power supply | 24 VDC nominal |
| Supply voltage range | 15-32 VDC |
| Protection rating | IP20 / NEMA 1 |
| Mounting type | DIN rail mounting |
| Dimensions (W × H × D) | 12 × 99 × 70 mm |
| Weight | Approx. 57 g |
| Operating temperature | -40°C to +70°C |
| Connection type | 10-pin removable terminal block |
The URD-0400B is a digital input module designed to monitor 120 VAC industrial control signals within UniStream Remote I/O automation systems.
The module provides 4 digital inputs for industrial automation applications.
The URD-0400B supports 120 VAC nominal inputs with an operating range of 85-132 VAC.
The module is designed for convenient DIN rail mounting within industrial control panels.
The URD-0400B is designed for use with Unitronics UniStream Remote I/O adapters and UniStream automation systems.
Unitronics UniStream Remote I/O modules are trusted by automation engineers and machine builders worldwide for reliable distributed control, flexible Ethernet networking and dependable industrial performance.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...