Components and Architecture - Redundant components
Revision 19 HC900 Process Controller Installation and User Guide 17
06/14
Table 2 – Descriptions of Major Redundancy Components
Key No. Component
Name
Description Source
1 Controller
(Local) Rack
Includes: Rack, 2 Power Supplies, 2 C75
Controllers, 1 Redundancy Switch Module (RSM)
Honeywell
2 I/O Expansion
Rack
Includes: 1 Scanner 2 module, 1 Power Supply, and
up to 4, 8, or 12 I/O modules. Optional second
Power Supply and Power Status Module (PSM) on
8- and 12-slot I/O racks.
Honeywell
3 Operator
Interface
900 Control Station operator interface
communicates via Ethernet or RS-485 serial link
Honeywell
4 PC
Configuration
Tool
• For legacy system- The PC configuration tool
connects from the RS-232 serial port of the
Controller Module to a serial port on the PC
• For new system – The PC Configuration tool
connects from the RS-485 port of the Controller
Module using an external Honeywell qualified
RS-485 to USB converter.
PC is from third-party
supplier. Configuration
software is from
Honeywell.
5 HMI (Human-
Machine
Interface)
(Optional) PC link to Ethernet network, which may
include other HMIs, other HC900 Controllers, and
other networks (including Internet).
Typically includes HMI operating software.
May also include Designer Software (configuration
tool and utility software).
PC is from third-party
supplier.
HMI software is
available from
Honeywell (PlantScape
or SpecView32) or from
third-party supplier.
6 Ethernet
100Base-T
Switch
Required if using 2 or more I/O Expansion racks.
Provides connection of the I/O Ethernet 100Base-T
port on a Controller Module to the Scanner
modules. Switch not required for connection to a
single I/O rack.
Honeywell
6a Ethernet
10/100Base-T
Switch or
Router
Enables inter-connection of several 10/100Base-T
Ethernet devices in an Ethernet network. Devices
include other HC900 Controllers, HMIs, and can
also include routers, brouters, servers, and other
devices in wider networks.
Honeywell or third-party
suppliers.
7 Ethernet CAT5
shielded cable
IO
Connects I/O expansion racks to controllers and/or
to 10/100baseT Ethernet switches. It also connects
to 900 Control Stations and PC SCADA software
applications.
Third-party suppliers or
Honeywell
Fiber Optics
Cable
Controller to remote rack distance up to 750m (2460
ft.) with one fiber cable. Distances up to 1500m
(4920 ft.) are possible with a fiber switch used as a
repeater at the midpoint.
9 RS-232 For legacy system, Null modem cable, up to 50’
(15.24m) (PC modem cable if used with Modems.)
Third-party suppliers or
Honeywell
10 RS-485 to USB
converter
Connects RS-485 port to USB port. Third-party suppliers or
Honeywell