Hi Beshoy,
CEM20 is backward compatible; you should be able to connect it to older series. The different series numbers on CEM20 are because the multiplexing unit does not get many upgrades. We upgraded CEM20 to series 2 when we moved from mechanical relay to solid-state relay; the same upgrade to the logger made it into a series 4.
Best regards,
Rudy Gunawan
Hi Beshoy,
CEM20 is backward compatible; you should be able to connect it to older series. The different series numbers on CEM20 are because the multiplexing unit does not get many upgrades. We upgraded CEM20 to series 2 when we moved from mechanical relay to solid-state relay; the same upgrade to the logger made it into a series 4.
Best regards,
Rudy Gunawan