I/O Implementation Requirements Include; Ethernet Open Connectivity Network - Honeywell 900U02-0100 User And Installation Manual

2.6.

I/O implementation requirements include:


Constructing a configuration file, and loading it into the Controller Module. This file includes
I/O numbering assignments for each I/O Function Block regarding Rack Number, Module
Number ("slot" number, or position in the rack, starting from the left), and Channel Number.

Physically assigning Rack Numbers, by positioning DIP switch settings in the Scanner Module
for each rack.

Placing the appropriate module type in each slot in each rack.
The I/O expansion network uses Honeywell private protocol that optimizes I/O performance and security.
The configuration and operation of the I/O expansion network is automatic, it is entirely under control of
built-in private software that resides in the Controller Module and in each Scanner Module included in the
ControlEdge HC900 system. The controller examines the control strategy stored in its memory, verifies
that the physical configuration (Rack Numbers and I/O Module type- by Module Number) matches the
stored control strategy, and establishes communication with each of the I/O modules in each of the I/O
racks.
I/O Expansion Network (C75 /C75S)
I/O for redundant controllers is the same as I/O Expansion Network page 31, with the following
exceptions/notes.

In Figure 19, any of the racks shown in each controller configuration can be 4-, 8- or 12-slot
versions. Redundant I/O power not available with 4-slot.

Double the amount of Switches and Ethernet cables are required to configure the redundant I/O
Link.

Maximum of 2 switches between each CPU (CPU A and CPU B) and the I/O racks.
2.7.

Ethernet Open Connectivity Network

The configuration of the Ethernet Open Connectivity Network varies with specific applications in purpose
and in complexity. In some applications, configuration is straightforward and within the capabilities of
experienced installation technicians. In other applications (for example, those that include inter-
connection to other networks such as Intranet and Internet), a working knowledge of networking is
required.
The Ethernet Open Connectivity Network for a given ControlEdge HC900 Controller enables:
 Redundant Networks.
 Peer-to-peer communication (Safety peer communication for SIL controller from release 6.300)
 Connection to other PC hosts
 Inter-connection to other networks (such as for sending Alarm/Event messages via e-mail.)
 These ports are to be considered part of the control network layer and as such care must be taken to
reduce exposure to uncontrolled network influences. A properly configured firewall such as the MOXA
EDR-810 is recommended to help mitigate.
Communications lockout is possible in high network traffic conditions.
Extraneous traffic is possible when sharing bandwidth with other devices. We recommend putting the
controller on a private network segment. Failure to do so could, in high traffic cases, result in
communications lockout requiring the controller to be power-cycled.
32 ControlEdge HC900 Process & Safety Controller User and Installation Manual Revision 10
May 2019