Installation Manual

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15). Overload Alarm Sets the overload alarm. When the output power is higher
than the set value, the unit will sound “beep” to remind that the unit is going to
shutdown. At the same time, the internal Dry Contact Relay will open/close
(See details in Section 3-1-6).
Default= 100%
Setting range= 50%~110%
6. RS-232 Communication and Operation
6-1. Operation of RS-232 Serial Port
6-1-1. This unit uses a standard 9-Pole D connector and three of the RS-232 signal
lines
Signal description PIN
N.C 1
RXD 2
TXD 3
DTR 4
GND 5
DSR 6
RTS 7
CTS 8
N.C 9
6-1-2. The connection between this unit and the computer is as follows
6-1-3. The RS-232 interface of this unit employs ASCII code to implement the
asynchronous serial transmission control.
The byte structure is START-BIP – 8 BIT DATA-STOP BIT.
Baud rate
1200/2400/4800/9600(See details in Section 5-3-1).
Computer
Power Inverter
RXD
GND
DXTDXT
GND
RXD
DSR
RTS
DTR
CTS
1 2 3 4 5
6 7 8 9