SIGMATEK 20-004-313, Operating Manual

Page: 32 / 56

CP 313 S-DIAS CPU MODULE
Page 30 29.05.2020
9.3 Shielding
The wiring for the CAN, VARAN and Ethernet must be shielded.
The low-ohm shielding is either connected at the entry to the control cabinet or directly
before the CP 313 over a large surface (cable grommets, grounding clamps)!
Noise signals can therefore be prohibited from reaching the electronics and affecting the
function.
To avoid compensating currents from the PE, which flow over the shielding the conductors,
it is recommended that the system components have low Ohm and low impedance
connections to one another.
9.4 ESD Protection
Before any device is connected to or disconnected from the CP 313, the potential with
ground must be equalized (by touching the control cabinet or ground terminal). Electrostatic
loads (through clothing and shoes) can thereby be dissipated.