ABB CR-U Universal Interface Relays

ABB CR-U Universal Interface Relays Supplier and Exporter in India

ABB CR-U Pluggable Universal Interface Relays for PLC & Control Panels

ABB CR-U is a range of pluggable universal interface relays used in industrial control panels, PLC systems, machine automation and process control circuits. These relays are normally installed between the control system and field equipment where electrical isolation, signal switching or contact multiplication is required.

The CR-U range is available with 2 or 3 changeover contacts, both rated up to 10 A at 250 V. ABB offers several AC and DC coil voltages, so the same relay family can be used across different control-panel standards and industrial applications.

A useful feature of the CR-U range is the built-in test button. During panel testing or maintenance, the relay contacts can be operated manually without applying a control signal. LED versions are also available where visual indication of the energised relay is required.

For buyers looking for an ABB CR-U universal interface relay supplier in India, ABB CR-U 24V DC relay, CR-U 230V AC relay, interface relay with socket or ABB CR-U export supply, the exact coil voltage, number of contacts, and model number should be provided for quotation.

ABB CR-U Relay Models

The CR-U family is mainly available in 2-changeover and 3-changeover contact versions.

ABB CR-U 2 Changeover Contact Relays

The 2 c/o versions are rated up to 10 A at 250 V.

Common models include:

• CR-U012DC2 – 12 V DC
• CR-U024DC2 – 24 V DC
• CR-U048DC2 – 48 V DC
• CR-U110DC2 – 110 V DC
• CR-U220DC2 – 220 V DC
• CR-U024AC2 – 24 V AC
• CR-U048AC2 – 48 V AC
• CR-U110AC2 – 110 V AC
• CR-U120AC2 – 120 V AC
• CR-U230AC2 – 230 V AC

ABB order codes include:

• CR-U024DC2 – 1SVR405621R1000
• CR-U230AC2 – 1SVR405621R3000

The CR-U024DC2 is one of the useful models for PLC and automation panels operating on a 24 V DC control supply. ABB identifies it as a 2 c/o, 10 A universal interface relay.

ABB CR-U 3 Changeover Contact Relays

The 3 c/o versions also provide contact ratings up to 10 A at 250 V.

Models include:

• CR-U012DC3 – 12 V DC
• CR-U024DC3 – 24 V DC
• CR-U048DC3 – 48 V DC
• CR-U110DC3 – 110 V DC
• CR-U220DC3 – 220 V DC
• CR-U024AC3 – 24 V AC
• CR-U048AC3 – 48 V AC
• CR-U110AC3 – 110 V AC
• CR-U120AC3 – 120 V AC
• CR-U230AC3 – 230 V AC

Important order codes include:

• CR-U024DC3 – 1SVR405622R1000
• CR-U230AC3 – 1SVR405622R3000

The CR-U230AC3 has a 230 V AC coil and three changeover contacts rated at 250 V / 10 A.

ABB CR-U LED Versions

ABB also offers CR-U relays with an integrated LED for easier status checking inside a control panel.

Typical models include:

• CR-U012DC2L
• CR-U024DC2L
• CR-U048DC2L
• CR-U110DC2L
• CR-U220DC2L
• CR-U024AC2L
• CR-U048AC2L
• CR-U110AC2L
• CR-U120AC2L
• CR-U230AC2L

Equivalent 3-changeover contact LED versions are also available.

The “L” suffix indicates the integrated LED version. For example, CR-U230AC2L uses the same 230 V AC coil and 2 c/o contact arrangement as CR-U230AC2 but adds relay status indication.

Technical Specifications

• Product family: ABB CR-U
• Product type: Pluggable universal interface relay
• Contact configurations: 2 c/o and 3 c/o
• Contact type: Changeover / SPDT
• Contact rating: Up to 10 A at 250 V
• Contact material: Silver nickel alloy (AgNi)
• DC coil voltages: 12 V, 24 V, 48 V, 110 V and 220 V DC
• AC coil voltages: 24 V, 48 V, 110 V, 120 V and 230 V AC
• LED versions: Available
• Manual test button: Integrated
• Test button locking function: Available
• Standard relay width: Approximately 35 mm
• Width when mounted on socket: Approximately 38 mm
• Relay construction: Pluggable
• Standard sockets: Available
• Logic sockets: Available
• DIN rail mounting: Through compatible socket
• Function modules: Diode, LED, RC, varistor and timing modules
• Relay holder and marker: Available
• Contact material: Cadmium-free
• Typical application: Isolation and switching between PLC/control systems and field devices

ABB describes the CR-U family specifically for electrical isolation, amplification and signal matching between PLC, industrial PC or fieldbus controls and sensors/actuators.

Features

• 2 or 3 changeover contacts: Useful where one control signal has to switch several circuits.
• 10 A contact rating: Both main contact configurations can handle control loads up to 10 A.
• Wide coil-voltage range: Covers common industrial AC and DC control voltages.
• Integrated test button: Allows manual relay operation during commissioning or troubleshooting.
• Lockable test function: Useful when checking panel wiring and control sequences.
• LED options available: Provides quick visual indication when the relay coil is energised.
• Pluggable relay design: The relay can be replaced without disconnecting the wiring from the socket.
• Standard and logic sockets: Different socket arrangements are available according to the panel layout.
• Function modules: Protection and indication modules can be plugged into the socket.
• DIN rail installation: Suitable for normal industrial control-panel construction.
• Contact multiplication: One PLC or control output can operate two or three separate circuits.
• Suitable for AC and DC control systems: Makes CR-U useful for both domestic and export panel requirements.

ABB CR-U Function Modules & Accessories

One advantage of the CR-U system is the range of plug-in accessories available for the relay sockets.

ABB offers modules for:

• Free-wheeling diode protection
• Reverse polarity protection
• LED indication
• RC spark suppression
• Varistor overvoltage protection
• Diode and LED combinations
• Varistor and LED combinations
• Multifunction timing

ABB also offers the CR-U T multifunction time module, designed for CR-U sockets and operating across a broad AC/DC control supply range.

These accessories are useful where inductive loads such as contactor or solenoid coils need suppression or where additional status indication is required.

ABB CR-U for PLC Interface Applications

CR-U relays are often used between a PLC output and equipment in the field.

For example, a CR-U024DC2 24 V DC interface relay can be energised from a PLC output. Its two changeover contacts can then be used for separate functions such as operating a contactor and providing an alarm or status signal.

A CR-U024DC3 can be selected where three independent contacts are required from the same control signal.

Typical devices switched through CR-U relays include:

• Contactors
• Solenoid valves
• Alarm circuits
• Indicator lamps
• Interlocking circuits
• Motor-control circuits
• Auxiliary control circuits
• PLC input/output circuits

This

makes the CR-U range useful for panel builders who need more contact capacity than a slim single-contact interface relay can provide.

ABB CR-U024DC2 & CR-U024DC3 24V DC Interface Relays

For 24 V DC automation applications, two useful CR-U models are:

CR-U024DC2 – 1SVR405621R1000

• Coil voltage: 24 V DC
• Contacts: 2 changeover
• Contact rating: 10 A / 250 V
• Integrated manual test button
• Compatible with CR-U sockets and function modules

CR-U024DC3 – 1SVR405622R1000

• Coil voltage: 24 V DC
• Contacts: 3 changeover
• Contact rating: 10 A / 250 V
• Manual test function
• Suitable where an additional contact is required

The difference is mainly the number of switching contacts, so the correct version should be selected according to the control circuit rather than only the coil voltage.

ABB CR-U230AC2 & CR-U230AC3 230V AC Relays

For panels using a 230 V AC control supply, ABB offers:

CR-U230AC2 – 1SVR405621R3000

• 230 V AC coil
• 2 changeover contacts
• 10 A / 250 V

CR-U230AC3 – 1SVR405622R3000

• 230 V AC coil
• 3 changeover contacts
• 10 A / 250 V

These models are suitable for traditional industrial control panels, machine control systems and auxiliary switching circuits using 230 V AC control voltage.

Applications

ABB CR-U relays are commonly used in:

• PLC panels
• Industrial automation panels
• Machine control systems
• MCC panels
• Process control panels
• OEM machinery
• Packaging equipment
• Conveyor systems
• Material handling systems
• Pump control panels
• HVAC control panels
• Water treatment plants
• Factory automation
• Manufacturing lines
• Building automation
• Generator control panels
• Electrical distribution panels
• Alarm circuits
• Interlocking circuits
• Contact multiplication
• PLC output isolation
• Signal switching
• Sensor and actuator interfacing
• General industrial control circuits

Choosing the Correct ABB CR-U Relay

For an ABB CR-U enquiry, buyers should ideally provide:

• Complete CR-U model number
• ABB order code
• Coil voltage
• AC or DC coil
• 2 c/o or 3 c/o contact requirement
• LED or non-LED version
• Socket requirement
• Function module requirement
• Quantity
• Destination country

For a replacement requirement, sharing a photograph of the existing relay and socket can also help confirm the correct model.

Looking for ABB CR-U Universal Interface Relays?

We supply ABB CR-U universal interface relays for PLC panels, industrial automation, machine control, OEM applications, panel building and export requirements.

Enquiries can be sent for ABB CR-U024DC2, CR-U024DC3, CR-U230AC2, CR-U230AC3, CR-U LED versions, compatible sockets and CR-U function modules.