Electrical Connection

The I/O module DC541-CM is mounted to the left of an AC500 CPU on the same Terminal Base. The connection to the communication module bus is automatically established while mounting.

The electrical connection of the I/O channels is carried out using the 10 terminals of the removable terminal block. I/O modules can be replaced without re-wiring.

Note

The DC451-CM is mounted in the same way as a Communication Module. The mounting is described in detail in chapter Mounting and disassembling the Terminal Bases, the CPUs and the Communication Modules. Mounting and disassembling the Terminal Bases, the CPUs and the Communication \ Modules - for PM57x, PM58x and PM59x only

Caution

Removal of energized modules is not permitted. All power sources (supply and process voltages) must be switched off while working on any AC500 system.

The process voltage is connected in the following way:

Terminal 1.8: Process voltage UP = +24 V DC

Terminal 1.9: Process voltage ZP = 0 V

The assignment of the other terminals:

Terminals	Signal	Meaning
1.0 to 1.7	C0 to C7	8 digital inputs/outputs

The internal supply voltage for the module’s electronic circuitry comes from the communication module bus. The process voltage for the inputs/outputs is supplied over ZP and UP.

The module provides several diagnostic functions Digital Input/Output Module DC541-CM).

The following figure shows the electrical connection of the input/output module DC541-CM.

Electrical connection of the I/O Module DC541-CM