Hardware Manual

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

Saia-Burgess Controls AG

PCD2.W5x0

Input/output (I/O) modules

5

PCD2.W500 Module, fully equipped

(with additional module plugged on)

Apart from the bus connector, DC-DC converter and terminals, the base module

carries the two input channels with the 2-pole jumper for unipolar or bipolar operation

and a number of preset potentiometers, which cannot be adjusted by the user.

The plug-on module contains the two analogue outputs with the two 3-pole jumpers

for the individual unipolar or bipolar operation of each output.

The module also works without the plug-on module.

Changing the jumpers

On this circuit board there are components that are sensitive to electrostatic

discharges. For further information, refer to Appendix B, “Icons”.

Block diagram

Prot.

EMC Diff.

Mux.

Prot.

EMC Diff.

Input 0

Input 1

/4

/8

V Adj.

A

D

Bus

Ref.

+/- 10 V 2.5 V

A

D

Bus

Diff.

x2

Prot.

EMC

x2

x4

A

D

Bus

Diff.

x2

Prot.

EMC

x2

x4

Output 0

Output 1

Ref.

2.5 V

+/- 10 V

Programming

Reset

When the module or CPU powers up, both analogue outputs of the PCD2.W500

Module are set at the maximum value of +10 V (or a random value between 0 and

+10 V). If this should cause problems, XOB 16 (the cold-start routine) should be used

to initialize both these outputs to zero or any desired cold-start value.