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74 C2907M-D (4/05)
Appendix A — Connecting PelcoNet to Various Components
Some of the connection examples that follow require a DB9 cable. Refer to the following figure when one is needed.
Figure 50. DB9 Cable Wire Splicing
SPECTRA
ESPRIT
TX+
TX-
RX+
RX-
TX+
TX-
RX+
RX-
DB9
TO RECEIVER
1
2
3
4
5
6
7
8
9
PIN
DCD (DATA CARRIER DETECT)
RX (RECEIVE DATA)
TX (TRANSMIT DATA)
DTR (DATA TERMINAL READY)
GND (GROUND)
DSR (DATA SET READY)
RTS (READY TO SEND)
CTS (CLEAR TO SEND)
RX+ (RECEIVE DATA PLUS)
TX- (TRANSMIT DATA MINUS)
GND
TX+ (TRANSMIT DATA PLUS)
RX- (RECEIVE DATA MINUS)
RS-232 RS-422/RS-485
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