Impulse 7205 - Manual (Page 12)

Technical Description
Sealevel Systems ULTRA COMM+2.LPCI Page 9
DB-25M (Card Edge Connector)
RS-232 RS-422/485 Port 1 Pin # Port 2 Pin #
RD RD- 1 11
CTS CTS- 2 12
DCD RD+ 3 13
TD TD- 4 14
RTS RTS- 5 15
DSR RTS+ 6 16
DTR TD+ 7 17
RI CTS+ 8 18
GND GND 9 10
Baud Rates and Oscillator Value
The following table shows some common data rates and the rates you should choose to achieve them when using
the ULTRA COMM+2.LPCI. If the O/S of choice is Windows 95/98/ME/2000/NT/XP, the oscillator value
(14.7456 MHz) will be automatically entered into the ‘Advanced Tab’ on 95/98/Me/2000/XP Device Manager
applet. When using Windows NT, the ‘Advanced Ports’ applet in the Control Panel should be launched and the
oscillator value may be entered in the ‘Advanced Tab’. When using any other OS (i.e. Linux, or QNX) the
following tables should be used.
For this Data Rate Choose this Data Rate
1200 bps 150 bps
2400 bps 300 bps
4800 bps 600 bps
9600 bps 1200 bps
19.2K bps 2400 bps
57.6 K bps 4800 bps
115.2 K bps 14.4K bps
230.4K bps 28.8K bps
460.8K bps 57.6 K bps
921.6K bps 115.2 K bps
If your communications package allows the use of Baud rate divisors, choose the appropriate divisor from the
following table:
For this Data Rate Choose this Divisor
1200 bps 768
2400 bps 384
4800 bps 192
9600 bps 96
19.2K bps 48
38.4K bps 24
57.6K bps 12
115.2K bps 8
230.4K bps 4
460.8K bps 2
921.6K bps 1