Introduction
8 ControlEdge HC900 Process & Safety Controller User and Installation Manual Revision 10
May 2019
1.3. Functional Description
All Controllers
The Honeywell ControlEdge HC900 Controller is an integrated loop and logic controller that is designed
specifically for small-and medium-scale unit operations
It comprises a set of hardware and software modules that can be assembled to satisfy any of a broad range
of process control applications. The ControlEdge HC900 Controller can consist of a single rack, as
indicated in Figure 1, or can be can be networked with other controllers via Ethernet links to expand the
dimensions of control over a wider range of unit processes, as indicated in Figure 2.
Although the ControlEdge HC900 E1/E2 ports provide protection against Cyber-security/DOS type
attacks, additional protection is required for safety applications using a firewall device configured to
prevent uncontrolled messages into the controller. The figures in this manual assume the firewall is
installed properly above the controller's Ethernet connection(s) E1 and E2.
Figure 1 – Small ControlEdge HC900 Controller Configuration
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