ABB TU846 3BSE022460R1 S800 I/O Redundant MTU
Manufacturer: ABB
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Part Number: TU846
Condition：New with Original Package
Product Type: Termination Units
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
ABB TU846 S800 I/O Module Termination Unit
The ABB TU846 (part number 3BSE022460R1) is a passive module termination unit (MTU) designed for S800 I/O systems. It provides physical mounting and electrical interconnections for redundant CI840 or CI840A Fieldbus Communication Interfaces (FCI), linking 24 V DC power supplies and dual electrical ModuleBus lines across industrial control enclosures.
System Interfacing and Network Address Setup
The termination unit integrates dual rotary switches that allow direct hardware configuration of station addresses ranging from 0 to 99. In addition to dual electrical ModuleBus interconnections, the unit supports extension to optical ModuleBus networks when paired with TB842 and TB846 optical modules, enabling communication via PROFIBUS, HART, Modbus, and analog I/O protocols.
Keying Mechanisms and Enclosure Specifications
To protect against misconfiguration and hardware damage during maintenance, the TU846 incorporates a mechanical keying arrangement featuring 4 keys (2 keys per CI840 position) with 6 distinct keying positions. Measuring 124 mm x 186 mm x 47 mm and weighing 0.5 kg, the compact unit operates within a temperature range of -20 to +60 deg C.
Technical Parameters
| Parameter | Specification |
|---|---|
| Model | TU846 |
| Brand | ABB |
| Part Number | 3BSE022460R1 |
| Product Type | Module Termination Unit (MTU) |
| System Compatibility | ABB S800 I/O, CI840, CI840A |
| Power Supply Input | 24 V DC |
| ModuleBus Support | Dual electrical ModuleBus (optional optical via TB842/TB846) |
| Protocol Support | PROFIBUS, HART, Modbus |
| Address Configuration | Dual rotary switches (0 to 99) |
| Mechanical Keying | 4 keys (2 per CI840 position), 6 positions each |
| Dimensions (W x H x D) | 124 mm x 186 mm x 47 mm |
| Weight | 0.5 kg |
| Operating Temperature | -20 to +60 deg C |
Frequently Asked Questions
Q: How is the node address set on the ABB TU846 termination unit? A: Address settings are configured manually using the onboard dual rotary switches, supporting address values from 0 to 99 for CI840/CI840A modules.
Q: What prevents incorrect module insertion on the TU846? A: Mechanical keying with 4 keys and 6 position settings prevents accidental insertion of incompatible modules.