TU531 and TU532 for I/O Modules

  • TU531, I/O terminal unit, 230 V AC, screw terminals
  • TU532, I/O terminal unit, 230 V AC, spring terminals
  • XC version for use in extreme ambient conditions available (TU532 only)
../_images/b585daf4e389039f0a33139000eba54e

The input/output modules (decentralized communication interface modules) plug into the I/O 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 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.

Screw terminals Spring terminals
Conductor ../_images/cb0f5afaa8bcdff30a3313903f4b6c2f Screwdriver Conductor ../_images/9660db05a8bdfbeb0a3313906e759f77 Screwdriver (opens terminal)

Note

For a detailed description of the mounting, disassembly and electrical connection of the terminal units and the I/O modules, please refer to the “System Assembly, Construction and Connection” chapter AC500 (Standard).

The terminals 1.8 to 4.8 and 1.9 to 4.9 are electrically interconnected within the terminal unit and always have the same assignment, independent of the inserted module:

  • Terminals 1.8 to 4.8: process voltage UP = +24 V DC
  • Terminals 1.9 to 4.9: process voltage ZP = 0 V

The assignment of the other terminals depends on the inserted decentralized communication interface module (see the description of the respective module used).

The supply voltage of 24 V DC for the module’s circuitry comes from the I/O expansion bus (I/O bus).