HomeVision-Serial is an add-on serial port for HomeVision. HomeVision-Pro includes two of these built into it. You cannot add any more to HomeVision-Pro.
Features
Has three operating modes:
RS-232 (standard PC serial port)
RS-485 half-duplex (two-wire mode)
RS-485 full-duplex (four-wire mode)
Supports baud rates of 300, 600, 1200, 2400, 4800, 9600, and 19200
Uses standard communication settings of 8 data bits, 1 start bit, 1 stop bit, and no parity
Does not use flow control
Has the same software capabilities as the built-in serial port, with a few minor exceptions
Connects to HomeVision through the expansion board connector (expansion boards can still be used)
Powered from HomeVision; no separate power supply needed
Up to two can be connected to HomeVision
Download the Installation and Operation Manual in Microsoft Word format (Serial_II.doc) or PDF format (Serial_II.pdf)