Beckhoff EK1960 Series, Operating Instructions Manual

Page: 36 / 145

Product description
EK1960 36 Version: 1.3.1
3.15.2 Clocked signals
All output groups (four outputs each) can be configured as clock outputs. The test pulses of the groups can
be set accordingly via parameters.
If a sensor such as a key switch (represented here by S19 and S20) is two-channel wired within one single
non-metallic sheathed cable, the two channels must be fed from different clock sources. This makes it
possible to detect cross-circuits or external power supplies within the common non-metallic sheathed cable
and to achieve a high level of diagnostic coverage.
Fig. 16: Wiring example – clock outputs to inputs