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URD-0400B – Unitronics DI4,120Vac,10R
Unitronics URD-0400B UniStream Remote I/O digital input module featuring 4 AC digital inputs for 120 VAC industrial automation and distributed control applications.
£80.33
Why Choose the Unitronics URD-0400B Remote I/O Module?
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.
Key Advantages
- Compact 4-channel digital input module.
- 120 VAC nominal input operation.
- 85-132 VAC input voltage range.
- Designed for Unitronics UniStream Remote I/O systems.
- Reliable monitoring of industrial AC control signals.
- Ethernet-based distributed automation architecture.
- Slim DIN rail-mounted design.
- Suitable for machine building and industrial automation applications.
Key Features
- Unitronics UniStream Remote I/O series.
- 4 digital inputs.
- 120 VAC nominal input voltage.
- 85-132 VAC operating range.
- 30 ms OFF to ON response time.
- 130 ms ON to OFF response time.
- Photocoupler isolation between I/O and logic.
- LED status indicators for each input.
- Removable terminal block connection.
- DIN rail mounting.
Reliable AC Signal Monitoring for Industrial Systems
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.
Typical Applications
- Industrial automation systems.
- Machine building and OEM equipment.
- Control panel monitoring.
- Process control installations.
- Packaging machinery.
- Material handling systems.
- Distributed Ethernet I/O networks.
- Industrial AC signal monitoring.
Technical Specifications
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| Signal / Input Range | 120/230 V AC | |
|---|---|---|
| Device Type | Digital I/O Module | |
| Signal Type / Function | Digital | |
| Number of I/O | 4 | |
| Product Series | UniStream Remote I/O (Uni-I/O) | |
| 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 |
Frequently Asked Questions
What is the Unitronics URD-0400B used for?
The URD-0400B is a digital input module designed to monitor 120 VAC industrial control signals within UniStream Remote I/O automation systems.
How many inputs does the module provide?
The module provides 4 digital inputs for industrial automation applications.
What input voltage does the module support?
The URD-0400B supports 120 VAC nominal inputs with an operating range of 85-132 VAC.
How is the module mounted?
The module is designed for convenient DIN rail mounting within industrial control panels.
Which systems are compatible with the URD-0400B?
The URD-0400B is designed for use with Unitronics UniStream Remote I/O adapters and UniStream automation systems.
Trusted for Industrial Automation Projects
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.
