CR-M4SS ABB Plug-in control relay module Spring terminal Double conversion contact

Product Overview

ABB CR-M2SS is a compact plug-in control relay module in the ABB CR-M series, specifically designed for scenarios with high requirements for installation efficiency and reliability in modern industrial automation, OEM equipment and process control systems. This product adopts Spring Clamp terminal blocks and supports tool-free quick wiring, significantly improving the assembly and maintenance speed. Equipped with 2 sets of conversion contacts (2CO), it is suitable for typical applications such as signal switching, interlock control, and status feedback. As a universal contact module, the CR-M2SS needs to be used in conjunction with the CR-PSS series sockets. The coil voltage is determined by the selected socket, achieving highly flexible system configuration.

Key features

✅ spring terminal, efficient wiring

No screwdriver is needed. Just insert the wire directly and it will lock automatically, saving more than 50% of the wiring time
It has excellent anti-vibration performance and is suitable for harsh environments such as mobile devices, robots, and rail transit
✅ 4 sets of conversion contacts, flexible function

Each group of contacts includes a common terminal (C), normally open (NO), and normally closed (NC), supporting single-throw double-throw (SPDT) control
It can realize various control logics such as signal selection, interlocking, and status feedback
✅ modular design for easy maintenance

When a fault occurs, only the relay body needs to be pulled out for replacement without disassembling any wiring
When combined with the CR-PSS socket, the overall width is only 17.5mm, saving the space of the control cabinet
✅ high reliability contacts

Contact material: AgNi (silver-nickel alloy), arc resistant and oxidation resistant
It has a long electrical life and is suitable for control circuits with frequent switching
✅ global certification, strong compatibility

Complies with the IEC/EN 61810-1 standard
Passed international certifications such as CE, UL, CSA and CCC

Basic parameters
Model: CR-M2SS
Series ABB CR-M plug-in Relay (Spring Terminal Type)
Contact configuration: 2 CO (2 sets of conversion contacts: each set contains C/NO/NC)
Contact material AgNi (silver-nickel alloy)
Rated working current • AC-15:3 A @ 230 V AC
• DC-13 2A @ 24 V DC
The maximum switching voltage is 250 V AC / 30 V DC
The mechanical life is ≥ 10⁷ operations
Electrical life (AC-15) ≥ 100,000 times (3 A, 230 V AC)
Insulation voltage (Ui) : 250 V
Pollution level 2
Protection grade IP20 (after installation with CR-PSS socket)
Operating temperature range: -25°C to +55°C
Installation method: Insert into the CR-PSS series socket (35mm DIN rail installation)
Wiring method: Spring terminal. Applicable wire cross-section: 0.08-2.5mm ² (single strand or flexible wire, no end terminals required)
Dimensions (width × height × depth) : 17.5mm × 60mm × 90mm
The weight is approximately 55 grams

Typical application scenarios
Industrial automation
It is used for the starting, stopping and protection of medium-voltage motors, such as water pumps, fans, compressors and other equipment.
Power transmission and distribution
Load switching and protection in scenarios such as medium-voltage switch cabinets and substations.
Energy and infrastructure
Auxiliary control of photovoltaic inverters, pumping stations of water treatment plants, and backup power switching systems.
OEM equipment integration
As a standard component embedded in the OEM control cabinet, it enhances the reliability of the entire machine.

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