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6
COMMUNICATION INTERFACE
The Inverter provides two computer interfaces: RS -232 and USB (optional). The RS-232
interface also has the dry contact function (DB-9, optional). The models with USB interface
are utilizing the same control port for both USB & RS -232 ports, so only one interface can
be used at a time.
6.1.
The definition and setup for RS-232 is shown as follows:
Baud Rate
: 2400 bps
Data Length : 8 bits
Stop Bit
: 1 bit
Parity
: None
5 4 3 2 1
9 8 7 6
Pin #6 : RS-232 data Tx out.
Pin #7 : Common of Pin #6 and Pin #9
Pin #9 : RS-232 data Rx In
6.2.
The definition and setup for DB9 (optional) is shown as follows:
Pin #2 : AC Power Failure
Pin #4 : Common GND of Pin #2 & Pin #5
Pin #5 : Inverter Battery Low
Pin #6 : Turn OFF Inverter
Pin #7 : GND of Pin6
The interface with computer is shown above for your reference. Use Pin #4 as the common
of Pin #2 and Pin #5, Pin #2 and Pin #4 will become close loop from open when the utility
fails, Pin #5 and Pin #4 will become close loop from open when the battery level is low.
The Inverter will shut down itself after receiving the high level from RS-232, sustainable for
3 seconds, which is applied between Pin #6 and Pin #7.
