ABB CR-M230AC4 Pluggable Interface Relay
The CR-M230AC4 is a pluggable miniature interface relay from ABB's CR-M range, designed to plug into a compatible ABB CR-M socket for snap-on DIN rail mounting. Operating on a 230V AC control supply, it provides a 4 c/o (SPDT) output rated at 250V/6A, allowing multiple circuits to be switched from a single input signal — a common requirement in control panels and automation systems across UAE commercial and industrial facilities.
Key Features
- 4 c/o (SPDT) output contacts rated at 250V/6A for switching up to four circuits from one input
- 230V AC rated control supply voltage for direct compatibility with mains-level control circuits
- Integrated test button for manual actuation and easy commissioning without live circuit testing
- Integrated LED provides visual indication of relay coil energization
- Genuine ABB quality — plugs into standard CR-M sockets for fast DIN rail installation
Technical Specifications
| Specification |
Details |
| Brand |
ABB |
| Model |
CR-M230AC4 |
| Function |
Pluggable miniature interface relay |
| Rated Control Supply Voltage (Us) |
230V AC |
| Output |
4 C/O (SPDT) Contacts |
| Output Signal |
250V / 6A |
| Rated Operational Voltage |
250V AC |
| Rated Frequency |
50/60Hz |
| Terminal Type |
Flat-Pin Connections |
| Rated Insulation Voltage (Ui) |
250V |
| Degree of Protection |
IP40 |
| Standards |
IEC/EN 61810-1, UL 508, CAN/CSA C22.2 No.14 |
| Ambient Operating Temperature |
-40°C to +55°C |
Applications
- Signal interfacing between PLCs and higher-power output circuits in control panels
- Multi-circuit switching from a single control signal in automation and process systems
- Relay logic and control wiring in BMS and building automation installations across the UAE
- Interface relay applications in industrial control cabinets and panel builder assemblies
FAQ
-
What is a pluggable interface relay used for?
It electrically isolates a low-power control signal (e.g. from a PLC, BMS, or sensor) from the higher-power circuit it needs to switch, and lets multiple contacts be switched simultaneously from one control signal — commonly used for signal interfacing, contact multiplication, and small load switching in control panels.
-
Does this need a separate socket/base to install?
Yes — pluggable relays like this mount into a compatible DIN-rail or PCB-mount socket (check the Technical Specifications table for the matching socket model) rather than being hard-wired directly, so the relay itself can be swapped without rewiring.
-
What does the contact configuration (e.g. 2c/o, 4c/o) mean?
"c/o" means changeover — each contact set has both normally-open and normally-closed positions. The number (2 or 4) is how many independent changeover contact sets the relay switches simultaneously from one coil signal.
-
Can I install this myself?
Fitting the relay into its socket is straightforward, but wiring the socket into a live control panel should be done by a licensed electrician or qualified panel builder.
