Ethernet Devices/Considerations; Figure 17 - Rs-232 Modem Devices - Honeywell HC900 Installation And User Manual

Components and Architecture - Ethernet Devices/Considerations
Redundant controllers: PC communicates with Lead controller only.

Ethernet Devices/Considerations

Ethernet device requirements vary with specific applications. Regarding intended use, however, they fall
into two categories:
•
interconnection of the HC900 Processor and Scanners must not be connected to any other LAN or
WAN. Likewise, no devices other than the HC900 components should be connected to the I/O link
Switch. Failure to comply will cause communication failures on the I/O link causing I/O modules to go
in and out of their failsafe settings.
•
Components of the Ethernet Open Connectivity Network, which links an HC900 Process Controller to
Peers, to HMI Supervisory Stations, and to other Ethernet 10/100Base-T devices that support TCP/IP.
The Ethernet Open connectivity Network is potentially more complex than the I/O expansion network,
and in some cases, may require the services of an IT networking professional.
Revision 19
06/14
Figure 17 – RS-232 Modem Devices
The HC900-expansion I/O link is a private network and the switch used for the
HC900 Process Controller Installation and User Guide 27