TU846 Module Termination Unit ABB Redundant I/O

ABB TU846 Module Termination Unit for Redundant I/O Configurations

• Brand & Model: ABB, TU846.
• Communication Protocol: PROFIBUS DP-V1 via two DSUB9 connectors.
• Redundancy Support: Full line and module redundancy for CI840/CI840A.
• Station Addressing: Two rotary switches allow address settings from 0 to 99.
• Mechanical Keying: Four mechanical keys (six positions each) provide 36 configurations.

Technical Specifications

• Power Input: 24 V d.c. (19.2 - 30 V), rated insulation voltage 50 V.
• ModuleBus Current Distribution: Max 5 V at 1.5 A and max 24 V at 1.5 A.
• Maximum ModuleBus Length: 2.5 meters from TU846 to terminator.
• Connectors: PROFIBUS (DSUB9), Service ports (RJ45), and ModuleBus Optical Port via TB846.
• Wire Terminals: Accepts 0.25 - 2.5 mm² (24 - 14 AWG), recommended torque 0.5 - 0.6 Nm.
• Environmental Ratings: Operating temperature 0 to +55 °C (+32 to +131 °F).
• Protection & Mounting: IP20, DIN rail mounting with latching device for locking and grounding.
• Dimensions: 124 mm (W) x 186 mm (H) x 47 mm (D); weight 0.5 kg.

Installation & Mounting Guidelines

• Mount the TU846 vertically or horizontally on a DIN rail using the integrated latching device.
• Ensure sufficient space to the left for removal; do not replace with power applied.
• Connect the two electrical ModuleBuses and the optical port (TB842 via TB846) as needed.
• Set the station address using the two rotary switches (0-99) before powering up.
• Use mechanical keys to prevent incorrect module insertion; each key has six positions.

Environmental & Certification Compliance

• CE Marking: Yes, complies with EN 61010-1, UL 61010-1, EN 61010-2-201.
• Hazardous Locations: cULus Class 1 Zone 2 and ATEX Zone 2 approved.
• Storage Temperature: -40 to +70 °C (-40 to +158 °F), non-condensing humidity 5-95%.
• RoHS & WEEE: Complies with EU, UAE, CN RoHS and DIRECTIVE/2012/19/EU.
• Ingress Protection: IP20 per IEC 529, equipment Class I (earth protected).

Frequently Asked Questions (FAQ)

• Q: Is the TU846 hot-swappable?
  A: No, the TU846 does not support hot swap; you must remove power before replacement.
• Q: Can I use TU846 with single I/O modules?
  A: No, TU846 is for redundant I/O; use TU847 for single I/O configurations.
• Q: What is the maximum ModuleBus length?
  A: The maximum length from TU846 to the terminator is 2.5 meters.
• Q: What are the acceptable wire sizes?
  A: 0.25 - 2.5 mm² (24 - 14 AWG) with a stripping length of 6-7.5 mm.
• Q: Does this unit support PROFIBUS DP-V1?
  A: Yes, the TU846 provides two PROFIBUS DP-V1 connections via DSUB9.

Contact Information Inquiries: sales@nex-auto.com , +86 153 9242 9628
Partner NexAuto Technology Limited: https://www.nex-auto.com/