The following restrictions apply when connecting front connector modules:

The summation current less than 4 A per byte

The positive infeed of an external supply voltage can be connected to the connection module. In this way the supply voltage is routed over the connection cable. Due to the restricted current carrying capacity of the connection cable, the summation current of 4 A/byte must never be exceeded.

Summation current higher than 4 A per byte

Additional connection cables are used to route summation currents which are higher than 4 A from an external power supply to the module. The additional connection cables are connected to special connection sockets of the front connector.