1 I/O bus (10 pins, male) to connect the previous terminal unit, the CPU terminal base or the
communication interface module to the terminal unit
2 I/O bus (10 pins, female) to connect other terminal units
3a Plug (2 x 25 pins) to connect the inserted I/O modules
3b Plug (3 x 19 pins) to connect the inserted I/O modules
4 With a screwdriver inserted in this place, the terminal unit and the adjacent I/O terminal unit
can be shoved from each other
5 Holes for screw mounting
6 40 terminals for signals and process supply voltage
7 DIN rail
8 White border signifies hot swap capability of the terminal unit
The input/output modules (I/O modules) plug into the I/O terminal unit. When properly plugged-
in, they are secured with two mechanical locks. All the connections are established via the
terminal unit, which allows removal and replacement of the I/O modules without disturbing the
wiring at the terminal unit.
The terminal units TU531 and TU532 are specifically designed for use with AC500/S500 I/O
modules that incorporate 115-230 V AC inputs and/or 230 V AC relay outputs.
WARNING!
Risk of explosion or fire in hazardous environments during hot swapping!
Hot swap must not be performed in flammable environments to avoid
life-threatening injury and property damage resulting from fire or explosion.
Hot swap
Terminal units (AC500 standard) > TU531 and TU532 for I/O modules
2022/01/313ADR010278, 3, en_US136
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