The ABB TB852 is an RCU-Link terminator. It is a component used in the Triconex safety system, which is a fault-tolerant, distributed control system (DCS) designed for critical applications in the process and power industries.

The RCU-Link is a communication protocol used by the Triconex system to connect remote control units (RCUs) to the main control unit (MCU). The TB852 terminator is used to terminate the RCU-Link cable at the end of the line, preventing signal reflections that could cause errors.

The TB852 is a small, rectangular device with a green LED that indicates power. It has two RJ45 connectors for the RCU-Link cable.

Here are some additional details about the ABB TB852:

• Part number: 3BSC950263R1
• Weight: 0.1 kg
• Dimensions: 60 x 40 x 20 mm
• Operating temperature: -40 to +70°C
• Storage temperature: -55 to +85°C

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