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In hazardous locations the CPU should not be removed or inserted into the carrier unless the input power has been deenergized for at least one minute. |
The CPU performs control, communications, and power conversion for the Zone 1 I.S. system. It uses a pair of 100M fiber-optic Ethernet ports (100 Base-FX) to provide redundant communication with the DeltaV system. Each port must be converted from 100M fiber-optic media to the 10/100M ethernet twisted-pair media. If the CPU is located in a Zone 1 location, a media converter with fiber-optic ports certified to allow a cable to be routed to Zone 1 locations is required. Emerson offers the Single Port Fiber Switch which has the required certifications. Refer to the DeltaV TM M-series Hardware Installation and Reference manual for information on the Single Port Fiber Switch. Fiber cables (62.5/125 micron multimode) with standard MT-RJ style jacks connect directly to the CPU.
