SBC PCD2.M5 Series - Page 119

Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Digital input modules
Input/output (I/O) modules
6-8
6
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
01
L
89
E0E1
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
89
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
components.