Impulse 5103 - Manual (Page 5)

Technical Description
Sealevel Systems ACB-MP.PCI Page 3
25 Pin Connector Signal Layouts (DB-25 Male)
RS-232 Signals
Signal Name Pin # Mode
GND Ground 7
RD Receive Data 3 Input
CTS Clear To Send 5 Input
DSR Data Set Ready 6 Input
DCD Data Carrier Detect 8 Input
TXC Transmit Clock 15 Input
RXC Receive Clock 17 Input
RI Ring Indicator 22 Input
TSET Transmit Signal Element Timing 24 Output
DTR Data Terminal Ready 20 Output
TD Transmit Data 2 Output
RTS Request To Send 4 Output
RI- is
connected to Port B CTS on the 85230 and the enable bit is set in Base+6.
DSR- is connected to Port B DCD on the 85230 the enable bit is set in Base+6.
Technical Note: Please terminate any control signals that are not going to be used. The most common way to do this
is connect RTS to CTS and RI. Also, connect DCD to DTR and DSR. Terminating these pins, if not used, will help
insure you get the best performance from your adapter.