ABB TU891 3BSC840157R1 Module Termination Unit

Overview

The ABB TU891 3BSC840157R1 is a compact module termination unit (MTU) designed for single I/O applications. It distributes the ModuleBus to the connected I/O module and the next MTU while generating correct addresses for the I/O modules.

General Information

• Article number: 3BSC840157R1

• Type: Compact

• Connection: Terminal block

• Channels: 8

• Voltage: 24 V

• Mounting: Horizontal

• Mounting detail: 55 ºC (131 °F)

• Use with I/O modules: AI890, AI893, AI895, AO890, AO895, DI890, DO890

• Process connections: 27 gray terminals

• Single/redundant I/O: Single

Electrical Characteristics

• Maximum current per I/O channel: 2 A

• Acceptable wire sizes:

• Process Connector: Solid 0.2–4 mm², Stranded 0.2–2.5 mm² (24–12 AWG)

• Power supply connector: 0.25–2.5 mm² (24–14 AWG)

• Recommended torque: 0.5–0.6 Nm (both connectors)

• Dielectric test voltage: 500 V AC

Environment and Certification

• CE mark: Yes

• Electrical safety: IEC 61131, EN 61010-1, EN 61010-2-201

• Hazardous location: –

• Marine certification: ABS, BV, DNV-GL, LR

• Operating temperature: 0 to +55 °C (+32 to +131 °F)

• Storage temperature: -40 to +70 °C (-40 to +158 °F)

• Relative humidity: 5–95 %, non-condensing

• Pollution degree: 2, IEC 60664-1

• Corrosion protection: ISA-S71.04: G3

• Max ambient temperature: 55 °C (131 °F), vertical mounting: 40 °C (104 °F)

• Protection class: IP20 (IEC 60529)

• Mechanical operating conditions: IEC/EN 61131-2

• EMC: EN 61000-6-4, EN 61000-6-2

• Overvoltage categories: IEC/EN 60664-1, EN 50178

• Equipment class: Class I (earth protected, IEC 61140)

Dimensions & Weight

• Width: 64 mm (1.77 in.) including connector; 58.5 mm (2.3 in.) edge-to-edge installed

• Depth: 58 mm (2.28 in.); 106 mm (4.2 in.) including terminals

• Height: 194 mm (7.6 in.) including latch

• Weight: 0.17 kg (0.37 lbs)