Description
The ABB TU845 is a module termination unit (MTU) designed for the ABB S800 I/O system used in industrial automation applications. Here’s a breakdown of its functionalities, specifications (based on available information), and where to find more details:
Function:
The TU845 acts as a vital link between the S800 controller and I/O modules:
- Terminates the ModuleBus signal: This prevents signal degradation along the ModuleBus, a communication bus within the S800 system, as more I/O modules are connected.
- Connects to I/O modules: The TU845 can support up to 8 I/O modules, allowing for expansion of the S800 system’s input/output capabilities.
- Provides power (in some models): Some variants of the TU845 might include fused power connections for specific sensor types.
Specifications (based on available information):
- Number of Channels: 8 channels for connecting I/O modules.
- Voltage Rating: Information on the voltage rating can vary depending on the specific model. It might be compatible with either 24V DC or 50V DC systems. Consult the datasheet or markings on the unit for confirmation.
- Compatibility: Designed for the ABB S800 I/O system and ModuleBus communication protocol.
- Dimensions: Specific dimensions are difficult to find without a datasheet, but being a compact unit, it’s suitable for space-constrained industrial control cabinets.
Applications:
The TU845 is used in various industrial automation applications where the S800 system is employed:
- Expanding the I/O capabilities of the S800 controller by connecting:
- Digital input/output modules
- Analog input/output modules (ensure voltage compatibility)
- Specialty modules for temperature, pressure, or other signal types (limited by the 8 channel capacity)
- Building cost-effective automation systems for applications where redundancy might not be a critical requirement.
