... % or AC220V±10%; has backup power supply(DC24V battery)connetion terminal, the main power supply can be automatically switch to the ... sheild cover floating. As the system power output only with 2 connect terminals, so need the external terminal box, eachstation parallel connected ... . DT201 and DT202 with the same connect board, the connect terminal+24V- are paralleled connected in side, and to use two ...