ABB AC500 PLC - 1.4.7 TU551-CS31 and TU552-CS31 for CS31 Communication Interface Modules

1.4.7 TU551-CS31 and TU552-CS31 for CS31 Communication Interface Modules
● TU551-CS31, CS31 bus terminal unit, 24 VDC, screw terminals
● TU552-CS31, CS31 bus terminal unit, 24 VDC, spring terminals
● TU552-CS31-XC, CS31 bus terminal unit, 24 VDC, spring terminals, XC version
1 I/O bus (10 pins, female) to electrically connect other terminal units
2 Plug (1x 5 pins and 2x 38 pins) to electrically connect the inserted I/O modules
3 With a screwdriver inserted in this place, the terminal unit and the adjacent terminal unit can
be shoved from each other
4 2 holes for wall mounting
5 CS31 bus interface
6 30 terminals for signals and process supply voltage
7 DIN rail
The CS31 communication interface modules plug into the terminal unit. When properly plugged-
in, they are secured with two mechanical locks. All the electrical connections are established via
the terminal unit, which allows removal and replacement of the CS31 communication interface
modules without disturbing the wiring at the terminal unit.
The Terminal Units TU551-CS31 and TU552-CS31 are specifically designed for use with S500
CS31 communication interface modules that incorporate only 24 VDC inputs/outputs or inter-
face signals.
Device Specifications
Terminal Units (AC500 Standard) > TU551-CS31 and TU552-CS31 for CS31 Communication Interface Modules
2019/04/173ADR010121, 13, en_US168