TU842 ABB 3BSE020850R1, Redundant Module Terminal Units

Description:

The TU842 MTU can have up to 16 I/O channels and 2+2 process voltage connections. Each channel has two I/O connections and one ZP connection. The maximum rated voltage is 50 V and maximum rated current is 3 A per channel.

The MTU distributes the two ModuleBuses to each I/O module and to the next MTU. It also generates the correct address to the I/O modules by shifting the outgoing position signals to the next MTU.

The MTU can be mounted on a standard DIN rail. It has a mechanical latch that locks the MTU to the DIN rail.

Four mechanical keys, two for each I/O module, are used to configure the MTU for different types of I/O modules. This is only a mechanical configuration and it does not affect the functionality of the MTU or the I/O module. Each key has six positions, which gives a total number of 36 different configurations.

Features and benefits
-Complete installation of I/O modules using 3-wire connections and field power distribution.
-Up to 16 channels of field signals and process power connections.
-Connections to two ModuleBuses and I/O modules.
-Mechanical keying prevents insertion of the wrong I/O module.
-Latching device to DIN rail for grounding.
-DIN rail mounting.