Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Communication interfaces
5
5-14
Serial interfaces - Slots A1 and A2
Not all manufacturers use the same connection configuration, so the data lines may
need to be crossed
The potential difference between PGND and the data lines Rx-Tx, /Rx-/Tx (and
SGND) is limited to 50 V by a suppressor capacitor.
For installation details, see manual 26/740 “Installation components for RS
-485
networks”