Brand: ABB

ABB CR-M024DC2 Interface Relay 24 V DC 2 c/o 12 A

Name: ABB CR-M024DC2 Interface Relay 24 V DC | Seven Star LLC
Brand: ABB
SKU: CR-M024DC2

Description

CR-M024DC2: a 24 V DC relay with two 12 A changeover contacts

CR-M024DC2 is the 24 V DC, two-contact version of ABB’s CR-M miniature interface relays. It has two changeover (SPDT) contacts rated 12 A at 250 V and no LED. It plugs into a CR-M socket and is typically driven from a 24 V PLC output.

According to the data sheet the relay is used for electrical isolation, amplification and signal matching between the control level and the sensor or actuator level. It has no internal protective circuit, so a free-wheeling diode or other function module can be added where needed.

Technical specifications

Parameter	Specification
Type designation / order code	CR-M024DC2 / 1SVR405611R1000
Relay type	Pluggable interface relay, 2 c/o (SPDT) contacts, without LED
Coil voltage Us	24 V DC; pick-up from 19.2 V, maximum 26.4 V at 55 C; drop-out at 0.1 Us or more
Coil power / resistance	0.9 W / 640 ohm (plus or minus 10 %)
Thermal current Ith	12 A; AC12 230 V 12 A; DC12 24 V 12 A
Inductive ratings	AC15 230 V 1.5 A, 120 V 3 A; DC13 24 V 2.5 A, 120 V 0.22 A, 250 V 0.1 A
Inrush / AC1 power	24 A / 3000 VA
Life / switching times	Mechanical above 20 million cycles; electrical above 100,000 cycles at 12 A 250 V; typical pick-up 13 ms, release 3 ms (DC)
Ambient temperature	Operation -40 to +70 C for DC coils; storage -40 to +85 C
Isolation	250 V AC; impulse 2.5 kV coil to contacts; overvoltage category III, pollution degree 3
Contact material / rated voltage	AgNi / Ue 250 V; max switching 250 V AC/DC; minimum 10 V and 5 mA
Test button	Integrated manual actuation and locking button (blue for DC, orange for AC coils)
Dimensions on socket / weight	21.2 x 27.5 x 35.6 mm (W x H x D) / 35 g; width on socket 27 mm
Protection / mounting	IP40 / on a CR-M socket, any mounting position
Approvals and standards	UL 508, CSA C22.2 No. 14, VDE, GOST, CCC, CE; EN 61810-1

Coil and contact behaviour

The coil draws 0.9 W with a resistance of 640 ohm. The relay picks up at 19.2 V DC at 20 C and tolerates up to 26.4 V DC at 55 C, and it releases at 10 percent of the rated voltage or more, which shows a wide operating window for 24 V supplies with ripple.

The two contacts are AgNi and carry 12 A resistive at 230 V AC or 24 V DC. For inductive loads the ratings fall to 1.5 A at 230 V AC (AC15) or 2.5 A at 24 V DC (DC13), so the load type matters. The test button actuates and locks the contacts for commissioning.

Sockets and function modules

Sockets for two-contact relays include the CR-M2SS standard screw socket (1SVR405651R1000), the CR-M2LS logical screw socket (1SVR405651R1100) and the CR-M4SS for 2 or 4 contacts (1SVR405651R3000). A plastic holder CR-MH (1SVR405659R1000) fixes the relay.

Plug-in function modules such as the CR-P/M 22 diode (1SVR405651R0000, 6 to 230 V DC) can be added for reverse-polarity protection or free-wheeling. For a DC coil, the CR-P/M 42 modules add an LED as well.

Documents and quotation

The linked file is the ABB CR-M pluggable interface relays data sheet 2CDC117002D0205. Seven Star LLC supplies the CR-M024DC2 on request from Muscat as an independent supplier; availability and lead time are given in the quotation. More products of this kind are in the Automation Accessories category, and a related item is the ABB CR-M024DC4L interface relay.

Confirm before ordering: the coil voltage on site (AC or DC), the load current and type (resistive or inductive), the number of changeover contacts needed and the socket type.

Datasheets & Documents

Datasheet ABB CR-M pluggable interface relays data sheet 2CDC117002D0205 Download

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About brand

ABB is the Swiss-Swedish engineering group for electrification and automation: low voltage drives, motors, circuit breakers and motor control, process instruments and analysers, control systems and robots. It was formed on 5 January 1988 by the merger of two older companies. ASEA was founded in Västerås, Sweden, in 1883 by Ludvig Fredholm to make electric lighting and generators. BBC Brown Boveri was founded in Baden near Zurich in 1891 by Charles E. L. Brown and Walter Boveri. ABB Ltd is incorporated in Switzerland, headquartered in Zurich and listed on the SIX Swiss Exchange and Nasdaq Stockholm.

ABB company profile

Formed	5 January 1988, by the merger of ASEA (Sweden) and BBC Brown Boveri (Switzerland), each holding 50%
ASEA	Founded 1883 in Västerås, Sweden, by Ludvig Fredholm; first products electric lighting and generators
Brown, Boveri & Cie	Founded 1891 in Baden, Switzerland, by Charles E. L. Brown and Walter Boveri
Headquarters	Zurich, Switzerland; ABB Ltd became the group holding company in 1999
Ownership	Public company listed on SIX Swiss Exchange and Nasdaq Stockholm
Brands in the group	Baldor (US motors, acquired 2011), B&R (machine automation, acquired 2017), K-TEK level instruments, Endura and Navigator analysers, SACE breakers
Product families	Low and medium voltage drives (ACS series), motors, SACE Tmax and Emax breakers, contactors and soft starters, flow, pressure, temperature and level instruments, liquid and gas analysers, Contrac actuators, AC500 PLCs, Ability System 800xA and S800 I/O, protection relays, robots

Milestones

1883: ASEA is founded in Västerås, Sweden.
1891: Brown, Boveri & Cie is founded in Baden, Switzerland.
1987–1988: The merger is announced on 10 August 1987; ABB Asea Brown Boveri starts operating on 5 January 1988.
1999: ABB Ltd, incorporated in Switzerland, becomes the single holding company of the group.
2011 and 2017: Baldor Electric and B&R join ABB.
2020: ABB sells its power grids business to Hitachi, focusing on electrification, motion, process and machine automation.

Choosing an ABB drive

ABB's ACS drive codes are easy to read once you know the pattern. In ACS580-01-046A-4, "ACS580" is the drive family, "01" means a wall-mounted single drive, "046A" is the rated output current (about 46 A) and "-4" means a 380–480 V supply. The family is chosen by application: ACS355 for compact machinery, ACS310 for simple pumps and fans, ACS580 as the general-purpose drive, ACQ580 for water and wastewater with pump functions such as pipe fill and dry-run protection, and ACS880 for heavy industrial duty with direct torque control. Size the drive on the motor's full-load current, not only its kW rating, and allow derating for the high ambient temperatures common in Gulf electrical rooms.

Where ABB products are used

In Oman and the GCC, ABB drives and motors run pumps, fans and compressors in water and wastewater plants, district cooling, oil and gas and industry. ABB flowmeters, level instruments and analysers are used in water utilities, power and desalination plants and refineries, and SACE breakers protect switchboards in buildings and plants.

ABB products we list

Family	Examples
AC drives	ACS580, ACS580-01-046A-4, ACQ580, ACS355, ACS310, ACS880-01, FEN-31 encoder module
Breakers, motor control and protection	SACE Tmax XT, XT3N 250, SACE Emax 2, AF09 contactor, PSR soft starter, REM615 relay
Flow measurement	ProcessMaster FEP300, AquaMaster4, CoriolisMaster FCB430, VortexMaster FSV430, SwirlMaster FSS430, OriMaster FPD500
Pressure, temperature and level	266DRH, 267CS multivariable, TTH300, K-TEK AT100, LMT200, MT5000 GWR, KM26 gauge
Analysers	Endura AZ20, AK100 hydrogen purity, Navigator AW641 silica, AW402 chlorine, AWT210
Control systems and actuators	AC500, AC500-S, S800 AI810, AC 800F SA 811F, Contrac RSD50, Contrac RHD4000

Ordering ABB products: what we need

Send the full type code from the nameplate (for example ACS580-01-046A-4 or 266DSH...) and, for spare parts, the ABB ID number (such as 3BSE008508R1 or 1SBL176001R3010). For drives, add the motor power and current and any option codes (+...). For instruments, send the complete order code, which sets range, materials and approvals. Baldor motors are listed on their own brand page.

Facts checked against ABB company filings and published histories of ASEA and Brown, Boveri & Cie, October 2026.