32 HC900 Process & Safety Controller User and Installation Manual Revision 6
21 April 2017
Each I/O module includes a status indicator for the module. Digital Input and Digital Output modules also
include a status indicator for each channel. Terminal blocks available include the Euro style (Error!
Reference source not found. left) and the Barrier style (Error! Reference source not found. right).
For more information on I/O modules and associated terminal blocks, refer to the section in this manual on
Input/Output Installation and Wiring.
Personal Computer
A Personal Computer is required to create the control and data acquisition strategy (configuration file) that
runs in the controller, using the Designer configuration software. The PC can also be used to
download/upload configuration files to/from the controller, and can be used to download program updates
to firmware in the Controller Module and/or Scanner Modules.
A PC can be connected to the controller via the RS-232 port for legacy system.
For the new system, a PC can be connected to the controller via the RS-485 to USB cable connected to
RS485 Port , which can be connected to external Honeywell qualified RS485 to USB converter, and can
also be networked to the controller via the Ethernet 10/100Base-T Open Connectivity Network port.
Redundant controllers: PC communicates with Lead Controller only.
NOTE: For specific PC requirements and for specific software requirements, refer to the Designer Software
Users Manual.
RS-232 Modem Devices
In Legacy systems the PC configuration tool can connect 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 to the galvanically isolated RS-485 port on the
Controller Module using an external Honeywell qualified RS-485 to USB converter.
The PC can be located remote from the Controller by using Modems and telephone links. Modems and
suitable cabling are available from third-party vendors.
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