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
5-20
Digital input modules, electrically isolated
LEDs and connection terminals
9
8
7
6
5
4
3
2
1
0
E0
E1
E2
E3
E4
E5
E6
E7
L
Bus connector
Bus interface and
threshold switch
Input circuits
Electrical isolation by
Optocouplers
LEDs
Screw terminals
Inputs E0 to E7
Input load resistors
User ground (-)
Input circuits and terminal designation
Depending on external wiring, this module may be used for source or sink operation.
Source operation (positive logic):
+5V
E0
E1
6k6
6k6
11k
11k
+5V
E0
E1
L
8
9
0
1
I/O Bus
Ue : 48 V
DC
24 V
DC
5 V
DC
Switch closed
(positive at input) : Input state "H" = LED on
Switch open : Input state "L" = LED off
PCD Bus
Sink operation (negative logic):
E0
E1
1
L
8
9
0
Switch closed
(negative at input) : Input state "H" = LED off
Switch open : Input state "L" = LED on
Ue : 48 V
DC
24 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 components.