ABB CR-M4SS Plug-in Relay Module with Spring Terminal Four Conversion Contact and Tool-free Quick Wiring

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

Product Overview

ABB CR-M4SS is a high-performance plug-in control relay module in the ABB CR-M series, specifically designed for industrial automation, process control and OEM equipment that require high flexibility and quick installation. This product adopts Spring Clamp terminal blocks and supports tool-free quick wiring, significantly improving the efficiency of installation and maintenance. Equipped with 4 sets of conversion contacts (4CO), it is suitable for complex logic switching, signal routing and dual-path control scenarios. The module can be used in conjunction with CR-PSS series sockets to achieve a true "plug and play" experience.

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-M4SS
Series ABB CR-M plug-in Relay (Spring Terminal Type)
Contact configuration: 4 CO (4 groups of conversion contacts: each group 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
Weight ≈ 60 g

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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