The C40 is an Automatic transfer switch controller manufacutered by Elmeasure. it is designed to work with traditional contactor instalation with both 2 pole and 4 pole applications.
The C40 has built in generator start output signal and an auxilary supply input to be powered by the generator battery.
The C40 monitors both supply 1 and supply 2 with an indepentant volt free contact for each supply to control the indipendant supply contactors with electronic isolation.
This unit also comes with RS485 connection for remote monitoring over TCP-IP.