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

For a detailed description of the mounting, disassembly and electrical connection of the module, please refer to the System Assembly, Construction and Connection chapter AC500 (Standard).

Warning

:strong:Removal/Insertion under power

The devices are not designed for removal or insertion under power. Because of unforeseeable consequences, it is not allowed to plug or unplug devices with the power being ON.

Make sure that all voltage sources (supply and process voltage) are switched off before you

  • connect or disconnect any signal or terminal block
  • remove, mount or replace a module.

Disconnecting any powered devices while energized in a hazardous location could result in an electric arc, which could create a flammable ignition resulting in fire or explosion.

Make sure that power is removed and that the area has been thoroughly checked to ensure that flammable materials are not present prior to proceeding.

The devices must not be opened when in operation. The same applies to the network interfaces.

The process voltage is connected in the following way:

Terminal 1.8: process voltage UP = +24 VDC

Terminal 1.9: process voltage ZP = 0 V

The assignment of the other terminals:

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

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

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

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

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Electrical connection of the I/O Module DC541-CM