ABB TU849 3BSE042560R1 Module Termination Unit

The TU849 is a module termination unit (MTU) for redundant configuration of Optical ModuleBus Modem TB840/TB840A. The MTU is a passive unit having connections for double power supply, one for each modem, a single electrical ModuleBus, two TB840/TB840A and a rotary switch for cluster address (1 to 7) setting.

Four mechanical keys, two for each position, are used to configured the MTU for the right types of modules. Each key has six positions, which gives a total number of 36 different configurations. The configurations can be changed with a screwdriver.

The MTU can be mounted on a standard DIN rail. It has a mechanical latch that locks the MTU to the DIN rail. The latch can be locked/unlocked with a screwdriver.

Termination unit TU848 has individual power supply connections and connects TB840/TB840A to redundant I/O. Termination unit TU849 has individual power supply connections and connects TB840/TB840A to non-redundant I/O.

Frequently asked questions about the product are as follows:

-What are the main functions of the ABB TU849 terminal unit?

It provides a secure interface for connecting field devices to the control system. The TU849 terminates and routes the wiring of various field devices to other modules within the automation system, enabling reliable data exchange and signal processing.

-What types of signals can the ABB TU849 handle?

Analog signals such as 4-20mA, 0-10V and other common analog standards. Digital signals from field devices that require discrete on/off control or status reporting.

-What systems is the ABB TU849 compatible with?

The TU849 is compatible with ABB 800xA and S+ Engineering systems. It works seamlessly with ABB's I/O modules, controllers and fieldbus networks to ensure proper connectivity between field devices and central control systems.