Inputs and outputs
FIT®5A
A3916-2.0
HBM: public
17
Important
No GND potential is present at device socket 2, so you must connect the refer
ence potential (GND) of the load circuits with GND at device socket 1.
There are two distinctive cases when connecting GND potential:
1. The arrangement of the function blocks, i.e. the digital part for the switch
outputs and the part for supplying with operating voltage and the interface,
is physically separate (Fig. 7.1).
2. Both function blocks are inside a control cabinet (Fig. 7.2).
In the first case, make sure that the shields of both leads, as well as the GND
potential, are each connected with a wire with a minimum cross-section of
1.5mm
2
. Both multipole and individual leads are suitable for this. However, the
individual leads must not take different routes, they must be close together.
The total length of a conductor must not exceed 10m (Fig. 7.1).
