Weidmuller UR20-4DI-P-3W Digital Input Module for 3-Wire Sensors
The Weidmuller UR20-4DI-P-3W digital input module is a compact remote I/O solution designed to reliably capture binary signals from industrial sensors and switches using 2-wire or 3-wire connections. It addresses common challenges in control cabinets by combining high signal stability, space efficiency, and simplified wiring in a single module. With four digital inputs compliant with IEC 61131-2 sensor standards, integrated sensor supply, and built-in reverse-polarity protection, the module ensures consistent performance in demanding automation environments. Its slim form factor supports high-density installations, making it well suited for scalable machine and process control systems where cabinet space and reliability are critical.
The UR20-4DI-P-3W is designed to enhance system reliability and reduce commissioning effort in real-world applications. Configurable input filtering helps maintain clean signal detection even in electrically noisy environments, while module-level diagnostics simplify troubleshooting and reduce downtime. Galvanic isolation improves protection between field wiring and control electronics, supporting safer operation. Powered directly via the system bus, the module minimizes additional wiring and integrates smoothly into distributed I/O architectures. Its robust mechanical design and wide operating temperature range make it suitable for continuous operation in industrial machinery, infrastructure, and automated production lines.
Why UR20-4DI-P-3W?
The UR20-4DI-P-3W stands out for engineers who want dependable digital signal acquisition without unnecessary complexity. Its ultra-slim design maximizes cabinet space, while integrated sensor supply and protection functions reduce external components and wiring effort. Designed for long-term industrial use, it balances robustness, flexibility, and scalability, making it an excellent choice for modern automation systems that must grow and adapt without redesigning the entire I/O structure.
What problem does it solve?
This module solves the challenge of reliably capturing on/off signals from field sensors in electrically noisy and space-limited environments. It ensures stable signal detection, protects control electronics from wiring faults, and simplifies installation by supporting common sensor types directly. By reducing wiring errors, improving diagnostics, and maintaining signal integrity, it helps prevent unplanned downtime and streamlines both commissioning and ongoing maintenance.
Key Features & Specifications – Weidmuller UR20-4DI-P-3W : 2009360000
| Feature | Details | Benefit |
|---|---|---|
| Product Type | Remote I/O digital input module | Enables reliable acquisition of binary signals in distributed automation systems |
| Number of Inputs | 4 digital inputs | Supports multiple sensors while reducing the number of required modules |
| Sensor Connection | 2-wire and 3-wire sensor support | Provides flexibility for different industrial sensor types without redesign |
| Switching Type | P-switching (PNP compatible) | Ensures compatibility with common industrial proximity sensors and switches |
| Sensor Supply | Integrated sensor power supply via input path | Eliminates external power wiring, simplifying panel design |
| Input Standards | IEC 61131-2 Type 1 and Type 3 | Guarantees stable and standardized signal detection |
| Input Voltage Thresholds | High > 11 V / Low < 5 V | Ensures clear signal differentiation and reduces false triggering |
| Input Filtering | Configurable input filter | Improves signal stability in electrically noisy environments |
| Reverse Polarity Protection | Yes | Protects the module and sensors from wiring errors |
| Diagnostics | Module-level diagnostics | Speeds up troubleshooting and reduces system downtime |
| Galvanic Isolation | 500 V DC between current paths | Enhances system safety and protects control electronics |
| Power Supply | 24 V DC via system bus | Reduces external wiring and improves modular scalability |
| Fieldbus Compatibility | Multi-protocol support via UR system | Allows seamless integration into various PLC and network environments |
| Mounting Method | DIN rail TS 35 | Enables fast, standardized installation in control cabinets |
| Housing Width | 11.5 mm slim design | Maximizes cabinet space and supports high-density I/O layouts |
| Operating Temperature | –20 °C to +60 °C | Ensures reliable operation in demanding industrial conditions |
| Mechanical Robustness | Shock and vibration resistant | Suitable for machinery and industrial environments |
Download Weidmuller UR20-4DI-P-3W (2009360000) Datasheet