Untested but assumed to be in good working condition. I think this can be powered from the serial port or from an AC adapter. Also if you need one I think I have a 25pin to 9 pin serial adapter I can include.
Some info found on the web:
IC11 converters provides all the features required of high quality interface converters in a miniature package and at a low cost!
The IC11 intelligent RS-232 to RS-422/485 converter can be selected for half/full duplex, and will allow transmission distances of up to 1220 m (4000').
The IC11 converts an RS-232 signal to RS-422/485. Simply attach one end to an RS-232 device and connect the other end (screw terminals) to an RS-422/485 device. The converter allows data transfer rates up to 120 Kbps. Power is acquired directly from a computerÃ‚Â’s serial port, or using ...
Function: RS-232 to RS-422/485 converter
Power: From RS-232 port or external (5 volt?)
Operate Mode: Full/half duplex
Data Rate: Up to 120 Kbps
IC11A-F Transmitter/Receiver Control
1) TX Enabled and RX Enabled
2) TX Enabled when RTS is ON, RX Enabled
3) TX Enabled when RTS ON, RX Enabled when RTS OFF
IC11-PLUS Transmitter/Receiver Control:
RS422/485 Connector: 5 screw terminals
69 mm L x 53 mm W x 22 mm H
(2.7 x 2.1 x 0.9")
0 to 50Ã‚Â°C (32 to 122Ã‚Â°F), 0 to 90% RH
Send your zip code for ship cost- should be between $3.95 and $4.95 if you are in the continental USA (Nov. 2012).