3BSE078710R1 | ABB TU860 MTU for Ethernet FCI (S800 I/O)

Overview

The ABB TU860 (Part Number: 3BSE078710R1) is an Ethernet Fieldbus Communication Interface (FCI) Module Termination Unit (MTU) designed for the S800 I/O system. It acts as a heavy-duty infrastructure hub, providing the mounting base and data/power pathways required to link single or redundant S800 I/O clusters to modern Ethernet networks via advanced AC 800M process controllers.

Technical Specifications

• Product Type: Ethernet FCI Module Termination Unit
• Model Code: TU860
• Part Number: 3BSE078710R1
• Manufacturer: ABB
• System Protocol Architecture: S800 on Ethernet / System 800xA Framework
• Mounting Orientation: Vertical DIN Rail Mounting (35 mm rail)
• Module Slot Allocations:
  • 2 slots for redundant CI845 FCI Communication Modules
  • 2 slots for redundant TC810 / TC811 Ethernet Adapters
• Power Configuration Type: Dual inputs for redundant 24 V DC power networks
• Downstream I/O Capacity: Interfaces up to 12 single or redundant S800 I/O modules/MTUs
• Ingress Protection Rating: IP20 (IEC 60529 Compliant)
• Hazardous Location Ratings: ATEX Zone 2 (II 3G Ex nA/eC IIC T4 Gc) / Class I, Div 2, Groups A, B, C, D T4
• Corrosive Atmosphere Resistance: Factory treated standard for ISA-S71.04 Class G3 exposure
• Operating Temperature Window: -40°C to +70°C (-40°F to +158°F)
• Customs Tariff Number (HS Code): 85371098
• Physical Dimensions: 21.0 cm x 13.5 cm x 9.55 cm
• Product Net Weight: 0.50 kg

Included Accessories (Factory Package)

• TL814K01 Empty Slot Protector: 1 piece included to shield unused high-integrity positions from dust and touch hazards.
• TB807 ModuleBus Terminators: 2 pieces included to stabilize and close the electrical ModuleBus end boundaries.

Installation Notes

• Snap the TU860 MTU vertically onto standard 35 mm metallic DIN rails inside the enclosure.
• Verify that the rear panel grounding contacts seat directly against unpainted steel rail tracks to secure a low-impedance frame path.
• Connect independent dual 24 V DC supply leads to the designated terminal connectors to activate the power redundancy lines.
• Install the included TB807 ModuleBus terminators onto the designated cluster endpoints to eliminate data signal reflections.