Saia-Burgess Controls AG
Manual
Manual PCD 1 / PCD 2 Series
│ Document 26
/
737 E
N22 │ 2013-11-26
5
Input/output (I/O) modules
5-10
Digital input modules
Input circuits and terminal designation
Depending on external wiring, this module may be used for source or sink operation.
Source operation (positive logic):
E1
4k7
4k7
10k
10k
E0
0
1
L
8
9
E0
E1
I/O
Bus
Inter-
face
PCD Bus
Ue : 24 V
DC
12 V
DC
5 V
DC
Load resistors
Input filter
Threshold
switch
LED
Switch closed
(positive at input) : Input state "H" = LED on
Switch open : Input state "L" = LED off
Sink operation (negative logic):
E0
0
E1
1
L
8
9
Switch closed
(negative at input) : Input state "L" = LED off
Switch open : Input state "H" = LED on
Ue : 24 V
DC
12 V
DC
5 V
DC
Watchdog: This module can be used on all base addresses; there is no interaction
with the watchdog on the CPUs. For details, please refer to the
“Watchdog” section
,
which describes the correct use of the watchdog in conjunction with PCD2 compo-
nents.