ABB|TU891 3BSC690075R1|Compact Module Termination Unit

ABB TU891 3BSC690075R1 Compact Module Termination Unit

Description
ABB TU891 is a compact, passive module termination unit designed for S800 I/O systems, optimized for intrinsic safety applications with up to 8 I/O channels.

Features

• Designed for intrinsic safety use with AI890, AI893, AI895, AO890, AO895, DI890, and DO890 modules
• Distributes ModuleBus and auto-addressing via position signals
• Gray terminals for field signal and power connections
• Mechanical keying prevents incorrect module insertion
• Latching mechanism for DIN rail mounting

Technical Specifications

• Type: Module Termination Unit (MTU)
• Channels: 8
• Voltage Rating: Up to 50 V (limited by I/O module design)
• Current per Channel: Max. 2 A
• Wire Size Compatibility:
  • 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)
• Torque Requirement: 0.5–0.6 Nm
• Dielectric Test Voltage: 500 V AC
• Mounting: Horizontal on DIN rail
• Operating Temperature: 0 to +55 °C
• Storage Temperature: -40 to +70 °C
• Humidity: 5–95% non-condensing
• Certifications: ATEX, IECEx, cFMus, ABS, BV, DNV-GL, LR
• Protection Class: IP20
• Pollution Degree: IEC 60664-1, Degree 2
• EMC Compliance: EN 61000-6-4, EN 61000-6-2
• RoHS Compliant: Yes
• Dimensions:
  • Width: 64 mm (with connector), 58.5 mm edge-to-edge
  • Depth: 58 mm, 106 mm including terminals
  • Height: 194 mm (with latch)
• Weight: 0.17 kg