Rear Panel Operations - Helios RM-PSW5KVA Series Instruction Manual

2-2 Rear Panel Operation:
2-2-1 Ventilation openings:
Do not obstruct, allow at least 3 inch for air flow.
2-2-2 AC input switch: This switch is to be operated by qualified personnel only.
2-2-3 Battery terminals:
Connect to 24V/48V/110V/220V battery or other 24V/48V/110V/220V power Source.
【＋】is positive,【－】is negative. Reverse polarity connection will blow internal fuse
and may damage inverter permanently.
Alarm relay operation:
Voltage free contacts ( NO, COM, NC )
1) With normal dc supply ON and inverter output OK, and AC by pass supply available:
 NC and COM is closed.
2) With normal dc supply ON and inverter output OK, and AC by pass supply not available:
 NO and COM is closed.
3) Inverter shutdown due to: "OTP, OVP, UVP, OLP, short load"
 NC and COM is closed.
2-2-4 RS-232:
Connect to computer to remote control working status.