ABB Symphony Harmony Series, Instruction, Page: 196 / 402

WBPEEUI240751C0 7 - 1
Section 7
Operating Procedures
Introduction
This section provides operating information for I/O blocks and
auxiliary blocks, and describes termination base markings and
color coding.
I/O Block
All I/O blocks share similar front and rear panel layouts.
Figure
7-1 shows an example front panel.
I/O Module Front Panel
The front panel of an I/O block communicates a considerable
amount of information including block type, operating mode,
and operating status. At a glance the following information can
easily be discerned:
•
Block type and model.
•
Operating mode.
•
Operating status.
•
Power status.
•
I/O channel status (digital I/O only).
Block Type and Model
A block type identifier enables quickly and easily identifying
general block type. I/O blocks are grouped into three major
categories: analog (A), digital (D), and control (C). These catego-
ries further divide into subcategories of input only (IN), output
only (OT), and both input and output (IO). A CIO block, for
example, is a control block that has both input and output
capabilities.
A model number distinguishes between the different I/O block
versions within a given block category. Each I/O block model
has different I/O capabilities.