Meet the TU841—MTU for 1+1 TB840/TB840A redundant setups, built for non-redundant I/O.
Passive unit with power supply connector, single ModuleBus, and two TB840/TB840A ports. Includes TB807 Modulebus Terminator.
Rotary switch sets cluster address (1-7). Four mechanical keys (6 positions each) let you pick the right module type—36 configurations total, adjustable with a screwdriver.
TU840 links to redundant I/O; TU841 connects to non-redundant I/O.
DIN-rail mounted. Has a latching device to lock it in place and ground it securely.