Product Specifications

Manufacturer	ABB
Part Number	3BSE057022R1
Model Name	TB853
Type	RCU Control Link Terminator
Operating Temperature	+5°C to +55°C
Storage Temperature	-40°C to +70°C
Relative Humidity	5% to 95% (non-condensing)
Enclosure Protection	IP20

The ABB TB853 (3BSE057022R1) is an RCU Control Link Terminator used in industrial and control systems. It caps and finishes the physical ends of redundant control unit (RCU) communication links to prevent signal bounce and data errors.

Terminator for RCU Control link. Used in redundant AC 800M controller setups to provide electrical termination for the RCU (Redundancy Control Unit) Control Link. Ensures high-speed signal integrity, eliminates transmission line reflections, and prevents communication noise between redundant processors to maintain uninterrupted hot-standby system synchronization.

Frequently asked questions：

Q : What is the ABB TB853?
A: The TB853 (Part Number: 3BSE057022R1) is a specialized, passive RCU (Redundancy Control Unit) Control Link Terminator engineered for ABB’s AC 800M controller line.

Q : What is the primary function of the TB853 in a DCS?
A: It performs impedance matching at the physical boundaries of the redundant control network. It prevents signal reflection, which can degrade data packets passing between the controllers.

Q : Which DCS ecosystem does the TB853 belong to?
A: It is a core hardware peripheral within the ABB System 800xA architecture, specifically under the AC 800M controller family.

Q : How many TB853 terminators are needed per redundant node?
A: A standard redundant pair layout mandates exactly two (2) units, sealing off both physical ends of the mirrored high-speed data loop.

Product Applications

Oil and Gas
Chemical and Petrochemical Industries
Power and Energy
Pharmaceuticals and Paper

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