Description
Product Overview
The ABB TB852 3BSC950263R1 is a passive RCU (Remote Control Unit) Link Terminator Plug. It is a small but critical component in ABB AC 800M control systems, designed to be plugged into an unused RCU Link connector to ensure proper signal termination.
This terminator is specifically for single-CPU configurations and is not used in redundant systems, where the RCU link is instead formed by a dedicated cable between controllers.
Parameter Values
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Product Model: ABB TB852 3BSC950263R1
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Brand: ABB
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Warranty: One Year
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Product Type: RCU Link Terminator Plug
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System Compatibility: ABB AC 800M controller systems
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Configuration Support: Single CPU only
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Termination Impedance: Passive, 120 Ω
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Power Consumption: < 2 W
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Input Voltage: From RCU Link (nominal 24 V DC)
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Operating Temperature: -25°C to +70°C
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Storage Temperature: -40°C to +85°C
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Humidity Range: 5% to 95% RH, non-condensing
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Response Time: Transparent
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Protection Class: IP20
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Communication Interface: RCU Link connector
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Supported Protocols: Not applicable
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Overload Capacity: Not applicable
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Dimensions: Approx. 57 mm × 20 mm × 23 mm
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Weight: Approx. 0.02 kg
Key Functions
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RCU Link Termination: TB852 3BSC950263R1 Plugs into an unused RCU Link port on a single AC 800M CPU to provide the correct 120 Ω termination, preventing signal reflections and communication errors.
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Passive Design: Requires no external power or configuration. It functions as a matched resistive load to absorb the signal at the end of the RCU link.
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Application Scenarios
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Single-CPU AC 800M Systems: Used to correctly terminate the RCU Link in projects that do not employ controller redundancy.
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Commissioning & Maintenance: Can be temporarily installed in a redundant system if one CPU is offline, ensuring the RCU link remains properly terminated during single-CPU operation.
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Distributed Control Architectures: Ensures stable communication on RCU links that connect AC 800M controllers to remote I/O or other RCU nodes in System 800xA DCS or standalone setups.
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