Why Choose the ABB CR-M220DC4LD Pluggable Relay?
The ABB CR-M220DC4LD is a compact and reliable pluggable miniature interface relay designed for electrical isolation, signal switching and industrial automation applications. As part of the ABB CR-M pluggable relay series, it combines a 220 V DC control coil with four changeover contacts for flexible interfacing between control equipment and connected loads.
This relay provides 4 C/O (4PDT) contacts rated at 250 V / 6 A. Its plug-in construction enables installation in compatible ABB CR-M sockets, simplifying control-panel assembly, servicing and relay replacement while providing a practical interface between PLCs, industrial controllers, sensors and actuators.
The CR-M220DC4LD includes an integrated LED status indicator and free-wheeling diode, making relay operation easy to identify while providing suppression of inductive voltage peaks in the DC coil circuit. An integrated blue test button also enables manual actuation and locking of the output contacts for commissioning, testing and maintenance.
Key Advantages
- Compact pluggable miniature interface relay for industrial control applications.
- 220 V DC rated control supply voltage.
- Four changeover (4 C/O / 4PDT) contacts for flexible multi-circuit switching.
- 250 V / 6 A output contact rating.
- Integrated LED status indication for convenient operational monitoring.
- Integrated free-wheeling diode for DC coil transient suppression.
- Blue test button allows manual actuation and locking of the output contacts.
- Plug-in construction simplifies installation, testing and replacement.
Key Features
- ABB CR-M miniature relay series.
- 220 V DC coil voltage.
- 4 C/O (4PDT) output contacts.
- 6 A contact rating.
- 250 V rated switching voltage.
- Built-in LED operating indicator.
- Built-in free-wheeling diode.
- Integrated blue test button for manual contact actuation.
- Compatible with ABB CR-M standard and logic sockets and associated accessories.
Reliable Switching for Industrial Control Systems
Pluggable interface relays such as the ABB CR-M220DC4LD provide electrical isolation, amplification and signal matching between electronic control equipment and sensor or actuator circuits. Its four changeover contacts enable several circuits to be controlled simultaneously from a single 220 V DC relay coil.
The ABB CR-M range is designed for convenient integration with PLCs, industrial PCs, fieldbus systems and conventional control circuits. The plug-in format supports efficient maintenance, while the integrated LED and manual test button make operational checks and troubleshooting easier within industrial control panels.
Typical Applications
- Industrial control cabinets and switchboards.
- PLC and industrial controller interface circuits.
- Machine control and factory automation systems.
- Signal isolation, amplification and switching.
- Sensor and actuator interface circuits.
- Motor control and auxiliary circuits.
- Process and infrastructure control systems.
