Why Choose the ABB RBR121-24VUC Interface Relay?
The ABB RBR121-24VUC, order code 1SNA645501R0500, is a compact R600 boxed interface relay designed for electrical isolation, signal amplification and signal matching between industrial control equipment and field-level devices. As part of the ABB R600 interface relay range, it combines a slim DIN rail format with dependable switching performance for control panels, PLC systems and industrial automation applications.
This interface relay operates from a 24 V AC/DC rated control supply and provides a single changeover (1 c/o / SPDT) output contact. The RBR121-24VUC uses spring terminals to provide secure electrical connections and automatically maintain terminal pressure, making it particularly suitable for industrial environments where reliable connections and resistance to vibration are important.
With a compact width of only 6 mm and a switching capability of up to 250 V AC / 6 A, the RBR121-24VUC provides high switching capability while occupying minimal control-panel space. An integrated LED provides clear visual indication of relay coil energisation, while the relay's enclosed construction enables convenient snap-on mounting to a DIN rail.
Key Advantages
- Compact 6 mm R600 interface relay for space-efficient control panels.
- 24 V AC/DC control supply suitable for common industrial control systems.
- 1 c/o (SPDT) output contact for flexible switching applications.
- Switching capability from 10 mA up to 6 A.
- Spring terminals provide secure, vibration-resistant conductor connections.
- Integrated LED status indication provides visual confirmation of coil energisation.
- DIN rail mounting simplifies installation within industrial control cabinets.
- Designed for electrical isolation, amplification and signal matching in automation systems.
Key Features
- ABB R600 boxed interface relay range.
- RBR121-24VUC relay type.
- 24 V AC/DC rated control supply voltage.
- 1 c/o (SPDT) output contact.
- Output switching current from 10 mA to 6 A.
- Output switching voltage up to 250 V AC.
- Spring terminal connection technology.
- Integrated LED for relay status indication.
- Compact 6 mm width for high-density panel installations.
- Snap-on DIN rail mounting.
- Relay soldered into the device housing for high vibration resistance.
- Flame-retardant UL 94-V0 device housing.
Reliable Interface Switching for Industrial Automation
Interface relays such as the ABB RBR121-24VUC provide an electrical interface between electronic control equipment and loads within industrial systems. They can be used for electrical isolation, signal amplification and signal matching between PLCs, industrial computers or fieldbus systems and sensors, actuators and other field-level equipment.
The ABB R600 range is designed for compact industrial control installations. The RBR121-24VUC combines a narrow 6 mm housing with spring-terminal connections and a soldered internal relay, helping provide reliable operation where panel space and resistance to vibration are important. Its integrated LED also allows maintenance and commissioning personnel to identify relay energisation quickly.
Typical Applications
- PLC input and output interfacing.
- Industrial control and automation panels.
- Electrical isolation between control and field circuits.
- Signal amplification and signal matching.
- Sensor and actuator interfacing.
- Machine control systems.
- Process automation equipment.
- High-density DIN rail control cabinets.
