Components And Architecture; Overview; Components - Honeywell HC900 Installation And User Manual

Overview

This section provides a description of each of the major components that can be included in an HC900
Controller physical configuration, and indicates some of the methods by which they can be combined.

Components

The Honeywell HC900 Hybrid Controller includes a set of hardware modules that can be combined and
configured as required for a wide range of small to medium process control applications.
Some of the modules are required in all configurations. Others are optional; they are selected as
appropriate to provide optional functions and/or to "size" the system, either in initial planning, or in
modifying and/or expanding the system to meet changing requirements.
An HC900 Controller configuration with multiple controllers is illustrated in Figure 3. This illustration
includes key-numbers that identify components that are described in Table 1.
Communications lockout is possible in high network traffic conditions.
When inter-connecting your HC900 controller sub-net to a plant network where there may be significant
network traffic not directed to the HC900 controllers or to related supervisory control or data acquisition
software interfaces, we highly recommend you use a router to protect the controller from this extraneous
traffic.
Failure to do so could, in high traffic cases, result in communications lockout requiring the
controller to be power-cycled. See Figure 59 on page 178 for an example of an installation for a typical
interface to another network sub-net.
Revision 5
9/03

Components and Architecture

HC900 Hybrid Controller Installation and User Guide 5