Unitronics URD-0400A UniStream Remote I/O digital input module featuring 4 digital inputs for 24 VAC industrial automation and distributed control applications.
SKU:URD-0400AAlt SKU:URD0400AMPN:URD-0400A
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Why Choose the Unitronics URD-0400A Remote I/O Module?
The Unitronics URD-0400A is a compact UniStream® Remote I/O digital input module designed to provide reliable monitoring of low-voltage AC signals in distributed industrial automation systems. As part of the Unitronics UniStream Remote I/O platform, the module provides four digital inputs for monitoring machine status, switches, sensors and control devices across Ethernet-based automation networks.
Designed for machine builders, panel manufacturers and automation engineers, the URD-0400A enables flexible remote input acquisition while reducing field wiring requirements. Its slim DIN rail-mounted construction makes it ideal for installations where control panel space is limited and reliable signal acquisition is essential.
With 4 digital inputs, 24 VAC operation and seamless integration into the UniStream Remote I/O architecture, the URD-0400A is suitable for industrial machinery, process equipment, material handling systems and distributed automation applications.
Key Advantages
Compact 4-channel digital input module.
24 VAC input operation.
Designed for Unitronics UniStream Remote I/O systems.
Suitable for machine building and industrial automation applications.
Key Features
Unitronics UniStream Remote I/O series.
4 digital inputs.
24 VAC input voltage.
Industrial-grade signal acquisition.
LED status indicators for each input.
Removable terminal block connections.
Ethernet Remote I/O compatibility.
Compact 12 mm module width.
DIN rail mounting.
Designed for distributed control systems.
Reliable Input Monitoring for Industrial Control Systems
The URD-0400A enables automation engineers to place digital input acquisition closer to field devices, reducing wiring complexity 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 acquisition.
Its compact design and dependable industrial construction make the module suitable for a wide range of automation applications requiring reliable AC signal monitoring and distributed control capabilities.
Typical Applications
Industrial automation systems.
Machine building and OEM equipment.
Packaging machinery.
Material handling systems.
Process control installations.
Production equipment monitoring.
Distributed Ethernet I/O networks.
Industrial control panels.
Technical Specifications
Current
0400 A
IP Rating
IP20
Series
UniStream Remote I/O
Product type
Digital input module
Number of inputs
4
Input type
AC digital inputs
Input voltage
24 VAC
Status indication
Individual LED indicators
Protection rating
IP20 / NEMA 1
Mounting type
DIN rail mounting
Module width
12 mm
Operating temperature
-40°C to +70°C
Connection type
Removable terminal block
Application
Distributed industrial automation systems
Frequently Asked Questions
What is the Unitronics URD-0400A used for?
The URD-0400A is a digital input module used to monitor 24 VAC field 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-0400A is designed for 24 VAC digital input signals.
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-0400A?
The URD-0400A 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.
Current
0400 A
IP Rating
IP20
Series
UniStream Remote I/O
Product type
Digital input module
Number of inputs
4
Input type
AC digital inputs
Input voltage
24 VAC
Status indication
Individual LED indicators
Protection rating
IP20 / NEMA 1
Mounting type
DIN rail mounting
Module width
12 mm
Operating temperature
-40°C to +70°C
Connection type
Removable terminal block
Application
Distributed industrial automation systems
No documents available for this product.
Delivery
We offer fast UK delivery on all stocked items. Orders placed before 3pm Monday to Friday are eligible for next-day delivery.
Standard delivery: 2–3 working days
Next-day delivery: available on in-stock items when ordered before 3pm
Express options available — contact us for details
Returns
If you need to return an item, please contact our sales team within 30 days of receipt. Items must be returned unused in their original packaging.
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
Priority sourcing and supply support
Flexible payment terms for qualifying organisations
Support for engineering, maintenance, and operations
500 +
Stock lines ready to ship
1,000 +
Same day dispatches
3500 +
Customers supported
28
Trusted Manfacturers
● frequently asked questions
Common questions about our products and support
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
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We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
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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...