ABB TU842 S800 I/O Redundant Terminal Base 3BSE020850R1

ABB TU842 S800 I/O Redundant Terminal Base 3BSE020850R1Product Overview The TU842 (Part Number: 3BSE020850R1) is a high integrity Redundant Module Termination Unit (MTU) designed for the ABB S800 I O system, compatible with Symphony Plus and AC 800M controllers. Its primary technical function is to provide the physical and electrical interface for redundant I O configurations. The TU842 (3BSE020850R1) distributes dual ModuleBuses to each I O module and ensures signal continuity to subsequent MTUs in the

It accepts inputs from a variety of transducers

0/4–20 mA

power check Mounting 3U compact plug-in card

The hardware links directly to the local system controller via the integrated 1769 backplane bus interface assembly

Common Mode Rejection: >115 dB @ 50/60 Hz

Prevent high-power AC cable layouts from crossing the structural surface of the end cap to avoid high-frequency noise injection on the terminated data channels

The 5503-198 (Part Number: 5503-198) combines robust processing power with versatile I/O capabilities

Neutralizes Current Transformer (CT) Saturation Risks: Advanced internal stabilization logic detects external through-fault currents that saturate physical CT cores

Ensure adequate spacing between modules to prevent heat accumulation

offering a high-integrity interface for both AC and DC loads

Corrosion-Resistant Durability: Constructed from heavy-duty

Isolation Voltage: 500 V AC between I/O and internal logic