Customer may need to know the pinout for the remote display cables for the PM8, CM3, and/or CM4 meters
The CM3000, CM4000, and PM800 all use the same display cable, whose current part numbers are CAB4 (4' length), CAB12 (12' length), and CAB 30 (30' length).
These display cables utilize a 6 pin RJ-11 jack with 26 AWG wire.
They are RS-232, so 50ft is the maximum length.
The pinout is shown below: