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Saia-Burgess Controls AG

Manual Manual PCD 1 / PCD 2 Series │ Document 26 / 737 EN22 │ 2013-11-26

Input/output (I/O) modules

5-45

Digital combined input and output modules

Input/output circuits and terminal designation

E/A5

E/A4

E/A3

E/A2

I/O Bus

PCD Bus

24 VDC

Fuse

The example shows E/A2 and E/A3 used as inputs and

E/A4 and E/A5 used as outputs

The following applies for the inputs:

Switch closed (input positive): Signal state = “1” = LED on

Switch open: Signal state = “0” = LED off

Fuse: It is recommended that each module should be separately protected with a

fast-blow 3.15 A fuse.

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.

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SBC PCD1 Series Specifications

General