Festo 1971599, Manual

Page: 33 / 150

1. System overview CPX-FVDA-P2
1-3
Festo P.BE-CPX-FVDA-P2-EN en 1209NH English
1.1 CPX terminal with output module CPX-FVDA-P2
Only the variant CPX-M-... of the terminal can be equipped
with the output module CPX-FVDA-P2. The module has 3 di-
gital output channels (CH0 ... CH2), which permit safe switch-
ing off of the following load voltages:
– Load voltage supply for valves U
VAL
of the CPX terminal
via output channel 0 (CH0 of the module). Through this
are supplied the right-side-mounted valve terminal pneu-
matics modules of the CPX terminal.
– Two output channels (CH1 and CH2 of the module) avail-
able through the connection technology.
In addition, for output channels 1 and 2 (CH1, CH2), the un-
switched load voltage supply U
VAL
is made available as oper-
ating voltage for external components (24 V DC).
The load voltage supplies of the CPX terminal run on contact
rails within the interlinking block for transmission to sub-
sequent modules.
For operation of the output module CPX-FVDA-P2, a special
interlinking block is required (
Tab. 1/3). In this interlinking
block, the contact rails of the load voltage supply U
VAL
and
U
OUT
are interrupted. The contact rails for U
VAL
are bridged
through switches of the CPX-FVDA-P2.
Therefore, the output module is able to switch off the load
voltage supply U
VAL
for the right-side pneumatics modules in
two channels (P- and M-switching). Two channels mean that
the 24 V string (P, high-side path) and the 0 V string (M, low-
side path) are switched commonly and simultaneously but
independently of each other.
In addition, the output module offers two output channels
(CH1 and CH2) that, on request, can also be switched off in a
safety-oriented manner (P- and M-switching). These output
channels are supplied from the load voltage supply for valves
U
VAL
.