Saia-Burgess
Controls Ltd.
Hardware Manual for the PCD3 Series│Document 26/789; Version E 5│31.01.2005
Hardware
PCD3.E165
5-13
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 interact with the watchdog. If it is used on base address
240, the last input with address 255 cannot be used.
Please refer to the
”Watchdog”
section for details on how to use the watchdog
correctly together with PCD3 components.
E1 E0
10k
10k
10k
10k
Ue 24 VDC
L
L
Screwless terminals
Switch closed (+ at input): signal state "H", LED lights up
Switch open: signal state "L", LED off
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E1 E0
Ue 24 VDC
L L
Screwless terminals
Switch closed (- at input): signal state "L", LED off
Switch open: signal state "H", LED lights up