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What are the communication ports on the CM4000 series meter and where are they located?

Issue
A customer would like to know the locations of the communication ports on a CM4000 series meter.

Product Line
CM4000, CM4000T

Environment
Communication Ports
ECC21 Card

Resolution
The following communication ports are shown on a CM4000 series meter with an ECC21 card:
COM1: RS-485 (Communication with daisy-chained devices)
COM2: RS-232 (Direct communications to the PC)

If the CM4000 series meter has an ECC21 card, then the following additional communication ports are available:
COM3: RS-485 (Communication with daisy-chained devices accessible through the Ethernet gateway)
Ethernet (Modbus TCP connection)
Fiber-optic (located to the right of the Ethernet port)



See FA203481 for more details on the ECC21's COM3 connection. The ECC21 Installation Guide is attached.
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