Processor Modules

CP-xx (CP-10, CP-11, CP-21) processor modules provide all processing, I/O scanning, logic, control and communications functions required in any of the RTU configurations that may be adopted. The processor module has up to three independent communications ports. Ports 2 and 3 can use plug-in option boards while port 1 is fixed as RS232C.

CP-30 is a newer processor in the product line-up and features more memory (32MB), and IEC-61131-3 ISaGRAF programming.

RTUs may have up to 2 CP-11 modules that can serve up to four backplanes in a hot standby configuration (note one processor should be in an odd numbered backplane slot and the other in an even numbered backplane slot). One processor controls I/O module scanning and communications while the other redundant processor listens. The redundant processor module will take control under the following conditions:

• Failure of I/O module scan
• Failure of Communications on selected ports
• Toolbox command
• Ladder command

The CP-10/11 has 1MB of flash memory for the storage of all operating code and selected system parameters, and 1MB of battery backed static RAM for all configuration and event storage data.

The CP-21 has 1MB of flash memory for the storage of all operating code and selected system parameters, and 2MB of battery backed static RAM for all configuration and event storage data. The CP-21 is also loaded with an ethernet driver chip that allows use of an ethernet option board on port 2 only.