Hardware Manual

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

Saia-Burgess Controls AG

PCD2.E61x

Input/output (I/O) modules

5

LEDs and connection terminals

9 8 7 6 5 4 3 2 1 0

LE 7 E 6 E 5 E 4 E 3 E 2 E 1 E 0

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

L E1E0

9 8 1 0

E/A-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):

E1E0

1

L

9 8 0

Switch closed

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

Ue : 48 VDC Switch open : Input state "L" = LED on

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.