1SNA645504R0000 ABB RBR121-230VUC R600 Interface Relay 230 V UC 1 C/O 10 mA–6 A

Why Choose the ABB RBR121-230VUC R600 Interface Relay?

The ABB RBR121-230VUC is a compact and reliable electromechanical interface relay designed for switching, signal interfacing and control circuit integration in industrial automation systems. As part of the ABB R600 interface relay series, it provides a practical connection between electrical control signals and external loads, making it suitable for industrial machinery, electrical control panels and automation equipment.

This relay features one changeover (1 C/O) contact, enabling a single control signal to switch between normally open and normally closed circuits. Its electromechanical switching principle provides flexible interfacing between control equipment and connected electrical devices. The R600 series offers compact DIN rail interface solutions for electrical engineers and panel builders requiring dependable control signal switching.

With a 230 V UC control voltage designation and a specified contact switching current range of 10 mA to 6 A, the RBR121-230VUC is suitable for a variety of industrial control and signalling applications. Its R600 modular design supports organised installation inside electrical control cabinets, helping simplify wiring and integration with contactors, automation controllers and auxiliary control equipment.

Key Advantages

• Reliable electromechanical interface relay designed for industrial automation and control applications.
• 230 V UC control voltage designation for compatible industrial control circuits.
• One changeover (1 C/O) contact provides flexible normally open and normally closed switching.
• 10 mA to 6 A contact switching current range for a variety of control and auxiliary loads.
• Part of the compact ABB R600 interface relay range.
• Electromechanical switching provides electrical separation between control and switched circuits.
• Suitable for integration with industrial automation equipment and control systems.
• Helps simplify the interface between control signals and external electrical devices.
• Modular construction supports organised installation inside electrical control panels.
• Designed for dependable switching in industrial machinery and electrical control applications.

Key Features

• ABB R600 interface relay series.
• RBR121-230VUC electromechanical interface relay.
• 230 V UC control voltage designation.
• 1 changeover (1 C/O) output contact.
• 10 mA to 6 A switching current range.
• Electromechanical relay output for control and signalling applications.
• Normally open and normally closed switching functionality.
• Electrical separation between the relay control circuit and output contact circuit.
• Compact modular construction for industrial control panels.
• Suitable for DIN rail interface assemblies.
• Compatible with appropriately rated industrial control and automation circuits.
• Suitable for switching auxiliary control loads and providing status signals.
• Part of ABB's industrial interface relays and optocouplers product range.

Technical Specifications

• Manufacturer: ABB
• Series: R600 Interface Relays
• Model: RBR121-230VUC
• ABB order code: 1SNA645504R0000
• Product group: Interface Relays & Optocouplers
• Product type: Electromechanical interface relay
• Relay function: Control circuit switching and signal interfacing
• Control voltage designation: 230 V UC
• Output contact configuration: 1 changeover (1 C/O)
• Contact arrangement: SPDT
• Switching current range: 10 mA to 6 A
• Maximum specified switching current: 6 A
• Minimum specified switching current: 10 mA
• Switching technology: Electromechanical relay
• Contact functions: Normally open (NO) and normally closed (NC)
• Installation format: R600 modular interface relay
• Typical installation: Industrial electrical control panels and DIN rail interface assemblies
• ABB product category: Measuring, monitoring and interface components

Reliable Relay Switching for Industrial Control and Automation

Electromechanical interface relays such as the ABB RBR121-230VUC provide a switching connection between industrial control circuits and external electrical loads. When the appropriate control voltage is applied to the relay coil, the internal changeover contact changes state, allowing one circuit to open while another closes. This enables control signals to operate connected equipment, provide status information or perform auxiliary switching functions within an automation system.

The ABB R600 series is designed for electrical engineers, control panel builders and industrial automation specialists requiring dependable relay interfacing. The RBR121-230VUC provides a single changeover contact with a specified switching current range of 10 mA to 6 A, allowing it to be incorporated into appropriately rated signalling and control circuits. Its modular interface format supports integration with industrial controllers, contactor circuits, machine control equipment and electrical distribution assemblies.

Typical Applications

• Industrial automation and electrical control panels.
• Control signal interfacing between automation equipment and field devices.
• Auxiliary switching in motor control and contactor circuits.
• Industrial machinery and manufacturing control systems.
• Relay-based alarm and status signalling circuits.
• Electrical distribution and control assemblies.
• Switching of compatible auxiliary electrical loads.
• Control circuit isolation and signal transfer applications.
• Packaging, processing and production machinery.
• OEM automation equipment and industrial machine building.