Hardware Manual

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

Saia-Burgess Controls AG

PCD2.W2x0

Input/output (I/O) modules

5

Block diagram

INPUT FILTER

E0

E1

E2

E3

E4

E5

E6

ANALOGUE INPUTSE7

MUX

A

D

BUSY (adr. 15)

DATA OUT

10 bits serial

A/D act. (addr. 15)

Clock

Channel address 0.. 7

I/O Bus

DATA

READ

WRITE

ADDR PCD Bus

+5 V

GND

+24 V

Voltage

Source

10.000 V

7K5

GND

Ref.

Voltage

2.500 V

..W220 only

Watchdog: This module cannot be used on the base address 240 (or 496 for the

PCD2.M170), because it would interact with the watchdog, and would cause a

malfunction.

For details, please refer to the “Watchdog” section, which describes the correct use

of the watchdog in conjunction with PCD2 components.