Overview
It creates a stable interface between I/O modules and field wiring, therefore improving signal clarity and operational consistency.
Moreover, TU849 supports organized cabinet layouts that simplify commissioning, inspection, and long-term system operation.
System integrators frequently select this unit to maintain clean wiring structures across complex industrial control installations.
Specification
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model Number | TU849 |
| ABB Order Code | 3BSE021445R1 |
| Product Type | Module Termination Unit (MTU) |
| Compatible Systems | ABB Advant OCS, ABB 800xA / S800 I/O |
| Primary Function | Termination and interfacing of I/O modules and field wiring |
| Communication Protocol | Modulebus (interfaces TB840/TB840A modules) |
| I/O Wiring Support | Single I/O connection for non-redundant systems |
| Power Input | Dual 24 V DC (19.2–30 V) for each modem/power rail |
| ModuleBus Current Distribution | Max 5 V / 1.5 A; 24 V / 1.5 A |
| Acceptable Wire Size (Terminals) | Solid: 0.2–2.5 mm²; Stranded: 0.2–2.5 mm² (24–12 AWG) |
| Recommended Terminal Torque | 0.5 Nm |
| Rated Insulation Voltage | 50 V |
| Dielectric Test Voltage | 500 V AC |
| Power Dissipation | ~2.5 W |
| Mechanical Keying | 36 configuration options (four mechanical keys) |
| Mounting | DIN-rail (vertical or horizontal) with latch grounding device |
| Mechanical Dimensions | Width: ~124 mm; Height: ~186.5 mm (with latch); Depth: ~47 mm |
| Weight | ~0.45 kg |
| Operating Temperature | 0 °C to +55 °C (horizontal); lower limit for vertical mount |
| Storage Temperature | Approx. –25 °C to +70 °C |
| Humidity | 5 – 95 % non-condensing |
| Protection Rating | IP20 per IEC 60529 |
| Certifications | CE, UL/cULus, ATEX Zone 2, Marine (ABS, BV, DNV-GL, LR) |
| Compliance | RoHS (EN 50581), WEEE |
FAQ
A1: TU849 provides structured termination between field wiring and I/O modules in ABB control systems.
Q2: Which control platforms support TU849?
A2: TU849 is compatible with ABB Advant OCS and ABB 800xA automation systems.
Q3: Does TU849 support both analog and digital signals?
A3: Yes, it supports termination for a wide range of analog and digital I/O modules.
Q4: How does TU849 improve maintenance efficiency?
A4: Clear labeling and organized terminals allow faster troubleshooting and safer signal verification.
Q5: Is TU849 suitable for system expansion projects?
A5: Yes, it supports scalable I/O designs and simplifies future expansion work.
Q6: In which industries is TU849 typically used?
A6: It is widely used in power generation, oil and gas, chemicals, and process manufacturing industries.
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Contact: Manski Wong +86 18030205725 manski@cambia.cn
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