Hardware Manual

Hardware Manual PCD 1 / PCD 2 Series│Document 26 / 737│Edition EN 15│2008-07-22

Saia-Burgess Controls AG

PCD2.E110, PCD2.E111, PCD2.E113 and PCD2.E116

Input/output (I/O) modules

5

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

1 0

L

9 8

E1E0

I/O

Bus

Inter-

face

PCD Bus

Ue : 24 VDC

12 VDC

5 VDC

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

9 8

Switch closed

(negative at input) : Input state "L" = LED off

Ue : 24 V 12 VDCDC Switch open : Input state "H" = LED on

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 compo-

nents.