
RJ-45 (Altpin On) to DB-9M Terminal Printer Cable
Terminal/Printer Cables, Altpin RJ-45 8-pin to DB-9
The wiring diagram for an altpin RJ-45 8-pin to DB-9 terminal/printer cable is shown in Table 1.
Table 1: EIA-232 altpin RJ-45 8-pin to DB-9 terminal/printer cable
From
RJ-45
Signal Direction Signal To DB-9
3 GND GND Shell
4 TxD
RxD 2
5 RxD
TxD 3
6SG
SG 5
7 CTS
DTR 4
1 DCD
RTS 7
2 RTS
CTS 8
8 DTR
DSR 6
* Arrows indicate which direction the signal is flowing
NOTES:
●
Altpin should be turned on when using this cable so that DTR will drive DCD (standard usage).
●
If altpin is turned off, the hardware signal on RJ45 pin 1 becomes DSR instead of DCD. This
alternative can be used if DCD is not required, and DSR is needed instead.
●
This cable utilizes the DTR signal of the terminal/printer for hardware flow control (RTS/CTS).
●
EIA-232 cables cannot exceed 2500pF.
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