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ABB TU842 System 800xA hardware selector

From:ABB | author:Mr.Chen | Time :2025-08-08 | 3 view: | Share:

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 instalation 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


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