one or more racks of I/O. Multiple I/O racks require Ethernet switches.
I/O racks – 5 racks shown, top to bottom: 4-slot w/1 power supply, 8-slot w/1 power supply, 12-slot w/1 power
supply, 8-slot w/redundant power supplies, 12-slot w/redundant power supplies. A Power Status Module (PSM) is
required with redundant power supplies. High and low capacity power supplies are available.
Redundant Networks for Host communications - Redundant Networks for Host communications are provided on
the C75 CPU. Both network ports are continuously active on the Lead controller. The network ports on the Reserve
CPU are not available for external communications. Experion HS and the 900 Control Station (15 inch model)
support redundant Ethernet communications and automatically transfer communications during a network failure.
Scanner 2 module – has 2 ports, one for each CPU connection to I/O.
Feature Summary
Hardware
Modular rack structure; components are ordered individually as needed
CPU with Ethernet communications
Easy to assemble, modify, and expand
Local (C30 and C30S) and Remote input/output racks (C50/C70), private Ethernet-linked sub-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 rack
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
In legacy systems, two serial ports, RS-232 or RS-485 can be configured.
In new systems, two RS-485 ports can be configured.
PC Configuration Tool
In legacy systems, RS-232 port used for link to PC configuration tool (up to 50 feet or 12.7 meters) or
modem. Port configurable as Modbus RTU/TCP master or slave.
In new systems RS-232 to RS-485 cable is used for link to PC configuration tool.
