Pilz PSS 3075-3 Series, Manual

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Operating Manual: PSS 3075-3 Series 6-3
NOTICE
There must be no direct connection between “N” and the 0 V output on
the external power supply!
• Please note:
Always connect the supply voltage to X0 and X7. If not, the
programmable safety system will not be able to perform various function
tests.
• Depending on the relevant national regulations, it may be necessary to
connect the 0 V supply to the central earth bar or to use some form of
earth fault monitoring (e.g. EN 60204-1, NFPA 79:17-7, NEC: Article
250).
INFORMATION
We recommend that the programmable safety system (“PSS”
connection) and the digital outputs (“X1/X2”, “X8/X9” connection) are fed
from separate power supplies, to increase the availability of the
programmable safety system.
CAUTION!
The maximum permitted load current at connectors X0 and X7 should
not be exceeded. Connectors X0 and X7 should therefore be fused (see
Fig. 6-1 and 6-2):
“PSS” connections: depending on the unit type (see “Technical details”)
“X1/X2” and “X8/X9” connections: 10 A each
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 (“PWR”
connection, connectors X1/X2, X8/X9). Please refer to Chapter 7, “Wiring
the Inputs and Outputs”.
Notes on wiring
• Minimum range for cable cross sections on field connection terminals in
mm
2
:
- Power supply: 1.5 (AWG16) ... 2.5 (AWG12)
- Functional earth: 2.5 (AWG12)