Festo CPX-FVDA-P2 Original Instructions Manual page 21

System overview CPX-FVDA-P2
– Version 3
– Switches off the two internal safe voltage zones: CH0, CH1.
– Switches off the safe output provided through the connection technology of the pneumatic
interface: CH2.
In addition, the unswitched load voltage supply U
technology of the module as operating voltage for the external components (24 V DC auxiliary
supply).
The voltage zones can be switched off independently of each other and in an electrically safe man-
ner.
The output channels of the output module CPX-FVDA-P2 each form a safety circuit with their connec-
ted consumers.
Output channels CH0, CH1 and CH2 can be used to safely switch off up to 3 switch-off groups (load
groups) or voltage zones independently of each other è Examples.
From the perspective of the output module CPX-FVDA-P2, the output channels (CH0 ... CH2) are chan-
nel pairs. The channel pairs can be switched together and at the same time, although independently of
each other. One channel forms the positive (P) path and another forms the negative (M) path for a
potential-free load voltage supply.
All P-switches and M-switches of the module output channels are controlled by different processors
that monitor each other continuously (safety concept).
Output channels 1 and 2 (CH1, CH2) in version 1 and output channel 2 in version 3 are suitable,
for example, for the load voltage supply of external components that must be switched off safely
when required and that fulfil the respective requirements è 2.4 Actuator requirements (CH0 ... CH2)
and è 8 Technical appendix.
Examples
– Soft start/quick exhaust valves for external components or the internal valve terminal pneumatics
(version 1, 2 and 3).
– Valve groups within the CPX terminal that are supplied separately via electrical supply plates (ver-
sion 1 and 3).
– Output signal groups that are supplied via additional electrical supplies.
These output signal groups can be arranged in both their own and a separate valve terminal (ver-
sion 1 and 3).
– Integrated power supply of another valve terminal. The operating voltage for electronics and
sensors U is supplied from the unswitched auxiliary power supply and the load voltage
EL/SEN
U /U from an output channel (CH1 or CH2). If required (during operation), the load of the oth-
VAL OUT
er valve terminal is then switched off without influencing the communication and input functions
(version 1 and 3).
NOTICE!
• Use a maximum of 2 output channels in a common safety pilot circuit.
Festo — CPX-FVDA-P2 — 2018-10b
is made available through the connection
VAL
21