SBC PCD2.M5 Series - Page 129

Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Digital input modules, electrically isolated
Input/output (I/O) modules
6-18
6
LEDs and connection terminals
9 8 7 6 5 4 3 2 1 0
E0E1E2E3E4E5E6E7L
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 VDC
24 VDC
5 VDC
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 VDC
24 VDC
5 VDC
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.