ABB TU890 3BSC690075R1 S800 I/O Intrinsic Safety Module Termination Unit

Description

The ABB TU890 is an 8-channel Module Termination Unit (MTU) for the S800 I/O system, designed for intrinsically safe applications. It provides the mounting base and electrical interface for IS I/O modules, ensuring signal integrity and safety in hazardous zones (0, 1, and 2). Ideal for oil, gas, and chemical industries, the 3BSC690075R1 integrates isolation and grounding for reliable field connections.

Specifications

• Manufacturer: ABB

• Model Designation: TU890

• Order Number: 3BSC690075R1

• Product Type: Intrinsic Safety Module Termination Unit

• Channel Capacity: 8 Channels

• Maximum Voltage: 50V

• Terminal Type: Screw Terminals

• Mounting: 35mm DIN Rail

• Dielectric Test Voltage: 1500 V a.c.

• Weight: 0.5 kg

• Dimensions: 186 mm x 58.5 mm x 47.5 mm

Features

• Hazardous Area Readiness: Specifically designed to house intrinsically safe modules, ensuring energy limitation to field-side circuits.

• Robust Signal Routing: Provides organized termination for up to 8 field signals, simplifying the wiring of complex sensor loops.

• Hot-Swap Maintenance: Enables the replacement of active I/O modules without disconnecting field wiring or disrupting the system bus.

• Mechanical Keying: Features integrated safety slots to prevent the insertion of non-IS modules, protecting hazardous area loops from improper voltage levels.

• Passive Reliability: Constructed as a passive component to maximize long-term operational stability and minimize system-level failure points.

• Simplified Grounding: Includes dedicated termination points for shield grounding, essential for maintaining signal purity in high-interference industrial environments.