Hardware Manual for the PCD3 Series│Document 26/789; Version E 5│31.01.2005
Saia-Burgess
Controls Ltd.
Introduction
Orientation guide
2-1
2
2
Orientation guide
2.1
Introduction
This manual covers the technical aspects of the PCD3 components. The following
terms are used frequently:
● CPU
Central processing unit: the heart of the PCD
● RIOs
Remote I/Os: inputs and outputs connected to the CPU via a field bus
such as Profibus
● LIOs
Local I/Os: these are connected to the CPU via the I/O bus or a RIO
(i.e. with the shortest possible cables)
● Modules
Input/output elements, mounted in a housing, matched to the PCD3
system
● Module
holder
CPU, RIO or LIO, to which modules may be attached
The aim of this section is to present the essentials of planning and installing control
systems with PCD3 components. It covers the following topics:
●
Planning an application
●
Cabling
●
Addressing and cabling of rows of controllers
Details of hardware, software, configuration, maintenance and troubleshooting are
described in separate sections. The Appendix contains an explanation of the icons
used, and the company address.