| The
RSB Serial Booster was designed to drive up to 20 optoisolated
NCD devices from a single RS-232 serial port with a DB25
connector.
The RSB has been tested to
drive RS-232 signals at 1000+ feet at data rates up to 38.4K
baud. Simply plug it into your RS-232 port, provide +12
volts to power the board, and run the In, Out, and Ground
lines to all devices on the network.
NCD devices use an
open-collector (O.C.) system for communicating data back to
the computer. O.C. RS-232 signals allow 16 devices to
share 3 data communication wires, but are NOT compatible with
standard RS-232 signals.
The RSB serial booster is used
to convert these O.C. signals back into PC compatible RS-232
levels. Note that this device cannot be used to send
data from NCD devices back to a Macintosh computer, but has
been tested to be fully compatible with all PCs.
A DB25 to DB9 adapter is
commonly available for use with some PCs. This device is
REQUIRED for the AD8 A/D converter and
the 8SC input scanner.
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