Saia-Burgess
Controls Ltd.
Hardware Manual for the PCD3 Series│Document 26/789; Version E 5│31.01.2005
Hardware
PCD3.E610
5-15
5
Input circuits and terminal designation
Depending on external wiring, this module may be used for source or sink operation.
Source operation or positive logic
Sink operation or negative logic
Watchdog: This module can be used on all base addresses; there is no interaction
with the watchdog for the CPUs.
+5V
E0
0
E1
1
L
8
9
E/A-Bus
PCD Bus
E0
E1
6k6
6k6
11k
11k
Ue 24 VDC
+5V
Switch closed
(positive at input) : Input state "H" = LED on
�
E0
0
E1
1
L
8
9
Ue 24 VDC
Switch closed
(negative at input) : Input state "H" = LED off
Switch open : Input state "L" = LED on