Feature Summary - Honeywell HC900 User And Installation Manual

Introduction

Feature Summary

Hardware

Modular rack structure; components are ordered individually as needed

CPU with Ethernet and isolated RS485 communications

Easy to assemble, modify, and expand

C30 and C30S controllers provide local I/O connections while C50/C70 and C50S/C70S Controllers provide for
remote input/output rack connections over a private Ethernet-linked network

Parallel processing - a microprocessor in each I/O module performs signal processing, to preserve update rates

Power supplies - provide power to CPU rack and Scanner I/O racks
Redundancy

Redundant C75 CPU
Redundancy Switch Module (RSM) – required between redundant CPUs

Redundant Power Supply – provides redundant power to any CPU rack or Scanner2 I/O rack

Power Status Module (PSM) – required when using a second power supply in Scanner2 I/O rack

Communications
All CPUs (except where noted):

Serial Ports:

Legacy
 Two serial ports, configurable for RS-232 or galvanically isolated RS-485 communications.
 RS232 port can be used for link to PC for 900 Designer configuration tool (up to 50ft/12.7 Meters)
or via modem. Also can be configured for Modbus RTU, master or slave.
 RS 485 port used for 2 wire link to legacy operator interface (ELN protocol) or can be configured
for Modbus RTU, master or slave communications (up to 2000 Ft /600 Meters).

New Controllers
 Two isolated RS 485 communications ports
 USB to RS485 cable must be obtained to support link to PC for 900 Designer configuration tool
 Can be configured for Modbus RTU, master or slave communications (up to 2000 Ft /600 Meters)
Revision 6
21 April 2017
HC900 Process & Safety Controller User and Installation Manual 13