Hardware Manual

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

Saia-Burgess Controls AG

PCD2.W3x0

Input/output (I/O) modules

5

Connection concept for two-wire transducers

E1

E0

GND

PCD 2 .W 310 /340

0 ...20 mA

4 ...20 mA*

R

2 4 VDC

Pressure

Tempera-

ture

Input filter

+

E2

*4...20 mA over user program

Two-wire transducers need a 24 VDC-supply in the measuring trunk.

Block diagram

E0

E1

E2

E3

E4

E5

E6

E7

GND

Rsource

Voltage

Source

10.000V

Ref.

Voltage

2.500V

Input filterand amplifier

MUX

A

D

Data

I/O Bus

PCD Bus

+5V

GND

/IOOUIT

IODIN

/IOWRITE

IODOUT

I/MS0

IOA0

IOA1

IOA2

IOA3

W340, W350, W360 only

Programming

Classic: Programming examples for the PCD2.W3x0 can be found in a separate

manual and on the TCS Support site (www.sbc-support.ch + getting started).

xx7: the firmware reads in the values according to the configuration (I/O Builder)

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

PCD2.M17x), 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.