ABB TB840A 3BSE042558R1 Redundant ModuleBus Unit
Spécifications techniques
Manufacturer: ABB
Condition：New with Original Package
Product Type: Module Termination Units
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Country of Origin: Germany
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
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Product Description
The ABB TB840A 3BSE042558R1 is a redundant ModuleBus unit designed for ABB distributed control system I/O configurations. It supports both line redundancy and module redundancy, with dual power input and ModuleBus communication. Furthermore, it distributes 5 V and 24 V power to connected ModuleBus equipment, providing a defined power distribution capacity for redundant I/O arrangements.
Functional Description
The TB840A supports redundant I/O configurations through line redundancy and module redundancy. Its dual-power design provides two power supply paths for the assembly. Meanwhile, ModuleBus communication provides the connection between the unit and the associated control system hardware.
The unit supports vertical or horizontal mounting. However, it is not hot-swappable, so maintenance and replacement procedures must account for this limitation.
Power Supply and ModuleBus Distribution
The unit accepts a 24 VDC input within a range of 19.2 to 30 VDC. Its ModuleBus power distribution supports a maximum current of 1.5 A on both the 5 V and 24 V distribution lines. Power dissipation is rated at 2.5 W.
Wiring and Mechanical Installation
The TB840A supports solid and stranded conductors from 0.2 to 2.5 mm2 (24-12 AWG). The recommended terminal tightening torque is 0.5 Nm. In addition, its mechanical keying system provides 36 different combinations to help distinguish connection configurations.
Correction: Article number 3BSE042558R1 identifies the ABB TU848, not the TB840A. The TU848 is a Module Termination Unit (MTU) for redundant TB840/TB840A configurations. The following product description uses the correct product identification.
ABB Automation+1
ABB TU848 3BSE042558R1 Redundant Module Termination Unit
The ABB TU848 3BSE042558R1 is a Module Termination Unit (MTU) designed for redundant configurations of TB840/TB840A Optical ModuleBus Modems in the ABB S800 I/O system. It provides connections for dual power supplies, two ModuleBus modems, and redundant electrical ModuleBus paths. Furthermore, its mechanical keying system offers 36 configuration combinations to help prevent incorrect module installation.
Redundant ModuleBus Configuration
The TU848 supports redundant I/O configurations by providing separate connections for two TB840/TB840A modems and dual electrical ModuleBus paths. Each modem has an individual power supply connection. Therefore, the unit supports separate power and communication paths within the redundant arrangement.
In addition, the MTU includes a rotary switch for setting the cluster address from 1 to 7. Its mechanical keying system uses two keys with six positions each, providing 36 possible combinations for module configuration.
Power Supply and Electrical Specifications
The TU848 accepts a nominal 24 VDC power input within a range of 19.2 to 30 VDC. Its ModuleBus power distribution supports up to 1.5 A on the 5 V supply and 1.5 A on the 24 V supply.
The unit has a rated insulation voltage of 50 V and a dielectric test voltage of 500 VAC. Its power dissipation is 2.5 W.
Wiring and Mounting
The unit supports vertical or horizontal mounting. Its wiring terminals accept solid and stranded conductors from 0.2 to 2.5 mm2, corresponding to 24-12 AWG. The recommended tightening torque is 0.5 Nm.
Furthermore, the mechanical keying arrangement provides 36 different combinations for configuration identification. The TU848 is not hot-swappable, so maintenance procedures must account for this restriction.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | TU848 |
| Brand | ABB |
| Article Number | 3BSE042558R1 |
| Product Type | Redundant Module Termination Unit (MTU) |
| Product Family | S800 I/O |
| Communication Protocol | ModuleBus |
| Supported Modems | TB840 / TB840A |
| Configuration | Redundant I/O, Dual Power |
| Line Redundancy | Yes |
| Module Redundancy | Yes |
| ModuleBus Connections | Dual Electrical ModuleBus |
| Power Input | 24 VDC |
| Power Input Range | 19.2-30 VDC |
| ModuleBus Current Distribution | 5 V: Max. 1.5 A; 24 V: Max. 1.5 A |
| Mechanical Keys | 36 Different Combinations |
| Cluster Address Setting | 1-7 |
| Hot Swap | No |
| Mounting Orientation | Vertical or Horizontal |
| Acceptable Solid Wire Size | 0.2-2.5 mm2 |
| Acceptable Stranded Wire Size | 0.2-2.5 mm2 (24-12 AWG) |
| Recommended Tightening Torque | 0.5 Nm |
| Rated Insulation Voltage | 50 V |
| Dielectric Test Voltage | 500 VAC |
| Power Dissipation | 2.5 W |
| Width | 124 mm |
| Height | 186.5 mm (including latch) |
| Depth | 47 mm |
| Weight | 0.45 kg |
| Ingress Protection | IP20 |
| Equipment Class | Class I, Earth Protected |
Frequently Asked Questions
Q: What is the function of the ABB TU848?
A: The TU848 is a Module Termination Unit for redundant TB840/TB840A Optical ModuleBus Modem configurations. It provides dual power connections and redundant electrical ModuleBus connections for redundant I/O arrangements.
Q: What is the difference between the TU848 and TU849?
A: Both units support redundant TB840/TB840A modems and individual power supply connections. However, the TU848 supports dual ModuleBus connections for redundant I/O, while the TU849 supports a single ModuleBus connection for non-redundant I/O.
Q: Does the TU848 support hot swapping?
A: No. The TU848 is specified as non-hot-swappable. Maintenance and replacement must therefore follow the applicable system shutdown and isolation procedures.
Other Attributes
- Series: Advant OCS/800xA
- Country of Origin: Germany/Sweden/Finland
- Lead Time: In Stock, 2 Working Days
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