Xantrex Technology SW Communications Adapter - Manual (Page 12)

2.0 INSTALLATION
4
©2002 Xantrex Technology Inc.
P/N 973-0022-01-01 Rev A 04/2002
Connecting the SWCA to a Computer using a Modem
The SWCA can be connected directly to a modem for use in remote sites
where a computer may not be available.
Requirements
To use a modem, the following is required:
• a terminal emulation program,
See SECTION 3.0 OPERATION, Use of the SWCA with Terminal
Emulation Programs.
• a modem capable of auto answer and supporting a 9600 baud connection,
• an adapter for the DB9 connection from the phone cable to serial port adapter,
• a
NULL MODEM adapter will be required for most applications. Contact the
modem provider and modem documentation for more information.
Additional Possible Requirements
The modem at the inverter location might need to be DC powered if it is
necessary to connect to the inverter during a fault condition where the inverter has
shut off its AC output.
Connecting Multiple SWCAs to a Single Computer
Up to eight SWCAs can be used with a single computer serial port. The phone
cable four conductors are simply run in parallel using standard phone cable line
“splitters”. The splitters must connect the wires of the same color together – do not
switch the colors around.
Before connecting multiple adapters to a serial port, connect each adapter
individually to ensure it operates properly. The adapter ID number must be changed
by using the DOS program provided on the disk before they are connected to the
same computer serial port. The ID number can only be changed with a single
adapter connected to the computer’s serial port.