Pilz PSS Series Operating Manual page 44

• NOTICE
There must be no direct connection between "N" and the 0 V output on
the external power supply or external power supplies!
• Connect together the 0V connections on all the 24 V power supplies and
earth the 0 V mains at a single point. The connection of the
0 V supply to the central earth bar or earth fault monitor must be in
accordance with relevant national regulations (e.g. EN 60204-1, NFPA
79:17-7, NEC: Article 250).
INFORMATION
If the inputs on the PSS are being used with test pulses, connect L- on the
input device supply to the 0 V terminal for the supply voltage (connector
X0). Please refer to Chapter 7, "Wiring the Inputs and Test Pulse Outputs".
Operating Manual: PSS SB 3006-3 Series
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