Connection

Notice

Risk of confusion: supply voltages and EtherCAT

Defect possible through incorrect insertion.

  • Observe the color coding of the connectors:
         black: Supply voltages
         green: EtherCAT

The supply voltages are output via four 4-pin M8 sockets labeled 1, 2, 3 and 4.

Connection 1:

Connection

Connection 2:
Connection of the M8 sockets

Contact

Voltage

1

Control voltage Us, +24 VDC

2

Peripheral voltage Up, +24 VDC

3

GNDs*

*) may be internally connected to one another depending on the connected module: see individual module descriptions

4

GNDp*

The contacts of the M8 connectors can conduct a maximum current of 4 A.

A LED indicates the status of the supply voltage outputs.

Control voltage Us: 24 VDC

Power is supplied to the fieldbus, the processor logic, the inputs and the sensors from the control voltage Us (24 VDC). The control voltage is electrically isolated from the fieldbus circuitry.

Peripheral voltage Up: 24 VDC

The peripheral voltage Up (24 VDC) supplies the digital outputs; it can be supplied separately. Hence, if the load voltage is switched off, the fieldbus function as well as the supply and function of the inputs are retained.

Electrical isolation

The grounds of the control voltage (GNDS) and peripheral voltage (GNDP) are electrically isolated from each other in order to ensure the electrical isolation of the peripheral devices on UP from the control voltage.

Notice

Unintentional cancellation of the electrical isolation possible

In some types of EtherCAT Box modules the ground potentials GNDS and GNDP are connected.

  • If several EtherCAT Box modules are supplied with the same electrically isolated voltages, check whether there is an EtherCAT Box among them in which the ground potentials are connected.