Description
ABB RER103 is a high-performance relay module designed to deliver reliable control and monitoring in industrial automation systems. As a key component from ABB, a leader in power and automation technologies, the
RER103 is engineered to meet the demanding requirements of modern industrial environments. This module serves as a versatile interface between control systems and field devices, enabling precise switching and signal conditioning. The
ABB RER103 is built to enhance system safety, efficiency, and scalability, making it an ideal choice for a wide range of applications that require robust relay solutions.
Parameter |
Specification |
Voltage Range |
24 V DC ±10% |
Contact Rating |
5 A/250 V AC, 5 A/30 V DC |
Number of Relays |
8 single-pole relays |
Interface Type |
Plug-in terminal blocks |
Operating Temperature |
-20°C to +60°C |
Dimensions (W×H×D) |
45 mm × 100 mm × 110 mm |
Compatibility |
ABB AC500 and other PLC systems |

RER103
The ABB RER103 stands out for its high reliability, with a mean time between failures (MTBF) exceeding 500,000 hours, ensuring minimal downtime in critical operations. Its compact design allows for space-saving installation in control cabinets, while the plug-and-play interface reduces wiring time and minimizes installation errors. The module features LED indicators for real-time status monitoring, enhancing diagnostic efficiency. Additionally, the RER103 incorporates surge protection and electrical isolation, safeguarding connected devices from voltage spikes and ground loops.
The ABB RER103 is widely used in industries such as manufacturing, energy, water treatment, and building automation. It is suitable for applications requiring safe switching of motors, valves, alarms, and other field devices.
Case Study: In a large-scale food processing plant, the RER103 was deployed to control conveyor belts and packaging machinery. The module’s fast response time (≤10 ms) and high noise immunity ensured seamless integration with the plant’s PLC system, improving production line efficiency by 15% while reducing maintenance costs through its durable design.
Compared to similar relay modules on the market, the ABB RER103 offers superior thermal management, allowing operation in higher-temperature environments without performance degradation. Its advanced diagnostic features, such as individual relay status indicators, provide greater operational visibility than standard modules. The module’s compliance with international safety standards (e.g., IEC 61131-2) further distinguishes it as a trusted choice for globally deployed systems.

RER103
When selecting a relay module, consider the following:
- Compatibility: Ensure the module is compatible with your PLC system (e.g., ABB AC500 series for optimal performance with RER103).
- Environmental Requirements: Evaluate operating temperature, humidity, and vibration levels to confirm the module’s suitability.
- Scalability: Choose a module with the right number of relays (8 channels for RER103) to meet current and future system needs.
- Budget: Balance upfront cost with long-term reliability; the RER103 offers a cost-effective solution with low lifecycle maintenance costs.
- Installation: Follow ABB’s guidelines for proper wiring and grounding to prevent electrical interference.
- Maintenance: Regularly inspect terminal connections for tightness and clean the module to avoid dust accumulation.
- Safety: Disconnect power before performing any maintenance or replacement to prevent electric shock.
Shanxi Xinyeda International Trading Co., Ltd. is your trusted partner, we provide and other automation spare parts sales and technical support. Please visit our website www.xydcontrol.com or contact us and we will be happy to serve you.
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