ABB RB122BR Relay Module

1. Product Overview

The ABB RB122BR Relay Module is a high-reliability relay output module designed for industrial automation and control applications. It provides electrically isolated relay outputs for switching loads, driving actuators, or sending status signals to external devices.
With robust construction, strong noise immunity, and easy wiring, it is suitable for various industrial environments and works seamlessly with PLCs, DCS systems, and protection devices.

2. Detailed Technical Specifications (Typical Values)

1. Electrical Characteristics

• Model: RB122BR

• Type: Relay Output Module

• Output Type: Relay contacts (NO/NC)

• Number of Relays: Typically 2 channels

• Contact Rating: 250 V AC / 30 V DC

• Rated Current: 5 A (AC) / 3 A (DC)

• Switching Capacity: 1250 VA / 90 W

2. Input Control

• Control Voltage: 24 V DC

• Coil Current: approx. 15–25 mA

3. Insulation & Life Cycle

• Electrical isolation between load and control circuits

• Dielectric strength: 2.5–4 kV

• Electrical life: ≥ 100,000 operations

• Mechanical life: ≥ 1,000,000 operations

4. Environmental Conditions

• Operating temperature: –20°C to +55°C

• Storage temperature: –40°C to +70°C

• Humidity: 5–95% non-condensing

• Mounting: DIN rail

• Protection class: IP20

3. Key Advantages & Features

• High reliability with long relay lifetime

• Simple installation with DIN-rail mounting

• Wide compatibility with ABB and third-party PLC/DCS systems

• Strong noise immunity suitable for industrial environments

• Clear status indication for easy troubleshooting

4. Typical Application Areas

• PLC/DCS digital output expansion

• Machinery and equipment control

• Motor start/stop switching

• Industrial process automation

• Alarm and status indication outputs

• Power equipment auxiliary circuits

• Switching pumps, valves, heaters, and solenoids

5. Installation & Safety Notes

• Always disconnect power before wiring.

• Do not exceed rated voltage or current on relay contacts.

• For inductive loads, use suppression devices (RC snubber/diode).

• Ensure proper ventilation to avoid overheating.

• Check terminal tightness periodically.

• Keep load and control circuits properly isolated.

• Avoid installation in environments with excessive vibration or contamination.