Festo 1971599, Manual

Page: 73 / 150

1. System overview CPX-FVDA-P2
1-43
Festo P.BE-CPX-FVDA-P2-EN en 1209NH English
1.4.2 Safety-oriented requirements
When loads are connected:
•
Comply with the requirements of the safety standards
valid for the respective load and system type. This applies
particularly for loads that have no further energy supply
or storage besides the electrical connection to the P- and
M-channel.
•
Make sure that the safe status of the loads is taken under
each of the following conditions:
– Switch-off of P-channel and M-channel (normal opera-
tion).
– Switch-off only of P-channel and M-channel (error
case).
If loads connected to additional voltage sources are con-
trolled:
•
Ensure one of the two following options:
– The additional voltages come from the same source as
the load voltage supply U
VAL
.
– The loads have a galvanic isolation, corresponding to
the required safety level, from the potential of the
output channels of the CPX-FVDA-P2.
If loads are operated that are switched via an additional out-
put module (
table Tab. 0/3):
•
Take measures to avoid or uncover cross circuits between
the additional output module and the load.
•
Operate the load potential-free.
•
Make sure that the voltage supplies used come from the
same source to ensure functioning of the cross circuit
detection.
•
Always connect the load to the related 0V port located on
the output module.