Product Description
ABB TU841 Module Termination Unit (MTU)
The TU841 is a Module Termination Unit (MTU) specifically designed for redundant configurations of Optical ModuleBus Modem TB840/TB840A. It provides a single connection for non-redundant I/O modules while ensuring reliability, flexibility, and ease of installation through its keying and address settings.
Key Features and Benefits
-
Cluster Address Setting:
- Equipped with a rotary switch to set cluster addresses (1–7).
-
Mechanical Keying:
- Prevents the insertion of incorrect module types.
- Configurable via screwdriver, with 36 possible combinations.
-
ModuleBus Connection:
- Single connection for easy integration.
-
Robust Design:
- Latching mechanism for DIN rail mounting ensures secure locking and grounding.
- Compatible with vertical or horizontal mounting orientations.
Technical Specifications
| Attribute | Details |
|---|---|
| Article Number | 3BSE020848R11 |
| Communication Protocol | ModuleBus |
| Redundancy | Yes (Redundant TB840/TB840A with Single I/O) |
| Power Input | 24 V d.c (19.2–30 V) |
| Current Distribution | - 5 V: 1.5 A |
| - 24 V: 1.5 A | |
| Power Dissipation | 2.0 W |
| Insulation Voltage | 50 V |
| Dielectric Test Voltage | 500 V a.c |
| Mechanical Keying Options | 36 combinations |
| Wire Sizes Supported | Solid: 0.2–2.5 mm², Stranded: 0.2–2.5 mm² |
| Torque for Wiring | Recommended: 0.5 Nm |
Environmental and Certification Details
| Attribute | Details |
|---|---|
| Operating Temperature | 0 to +55 °C (+32 to +131 °F) |
| Storage Temperature | -40 to +70 °C (-40 to +158 °F) |
| Relative Humidity | 5–95% (non-condensing) |
| Ingress Protection | IP20 (IEC 60529) |
| Compliance | - CE Marking |
| Safety Standards | - EN 61010-1, UL 61010-1
| - EN 61010-2-201, UL 61010-2-201 |
| Hazardous Location Approvals | - cULus Class 1 Zone 2
| - ATEX Zone 2 |
| Marine Certifications | ABS, BV, DNV-GL, LR |
Mechanical Details
| Attribute | Value |
|---|---|
| Width | 124 mm (4.88 in.) |
| Height | 186 mm (7.32 in.) |
| Depth | 47 mm (1.85 in.) |
| Weight | 0.45 kg (0.99 lbs.) |
Applications and Use Cases
The TU841 is ideal for:
- Connecting TB840/TB840A to non-redundant I/O systems.
- Industrial systems requiring secure ModuleBus integration.
- Ensuring robust connections with its mechanical keying and rotary cluster addressing.