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RJ45 (F) to DB9 (M) 3
- Thread starter gaz0181
- Start date
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1
- #2
Here is what my notes say:
DB 9 null modem plug
1 nc
2 red
3 green
4 white
5 black
6 blue
7 brown
8 orange
9 nc (tape yellow)
Or this covers both straight (II) and crossover (X) for both 9 and 25 pin connectors:
Modular - Serial (RS-232)
II X II X
DB9 Co Fn DB25
3 2 Rd TD 2 3
2 3 Gr RD 3 2
7 8 Or RTS 4 5
8 7 Br CTS 5 4
5 5 Bk GND 7 7
1 - Yl DCD 8 -
4 6 Bu DTR 20 6
6 1/4 Wh DSR 6 8/20
DB 9 null modem plug
1 nc
2 red
3 green
4 white
5 black
6 blue
7 brown
8 orange
9 nc (tape yellow)
Or this covers both straight (II) and crossover (X) for both 9 and 25 pin connectors:
Modular - Serial (RS-232)
II X II X
DB9 Co Fn DB25
3 2 Rd TD 2 3
2 3 Gr RD 3 2
7 8 Or RTS 4 5
8 7 Br CTS 5 4
5 5 Bk GND 7 7
1 - Yl DCD 8 -
4 6 Bu DTR 20 6
6 1/4 Wh DSR 6 8/20
I would suggest a google search for D9 connector specifications for the signals required for it. RJ45 specifications are pretty much at the choice of whoever is supplying the signals. Is there a manual available?
It might help if you told us where the RJ45 signals come from. Possibly a multiport card?
RS232 interconnections for data interchange can be wierd, so be prepared for experimenting.
Ed Fair
Give the wrong symptoms, get the wrong solutions.
It might help if you told us where the RJ45 signals come from. Possibly a multiport card?
RS232 interconnections for data interchange can be wierd, so be prepared for experimenting.
Ed Fair
Give the wrong symptoms, get the wrong solutions.
- Thread starter
- #4
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2
- #5
robertjo24
MIS
From what I have seen, pins 3 & 6 of the RJ-45 are TX and RX, and pin 4 is signal ground. On the RJ-45 to DB-9 adaptor, they are often the Black, Yellow, and Red wires.
Here are the RJ-45 jack to wire colors on all of the adaptors I have used:
1 BLUE
2 ORANGE
3 BLACK
4 RED
5 GREEN
6 YELLOW
7 BROWN
8 WHITE
When pinning out the DB-9 connector, I typically start with BLACK on pin 2 and YELLOW on pin 3, RED always goes to pin 5. I usually do not use handshaking for my serial connections. If you are crossing TX & RX, swap the YELLOW and BLACK leads into the DB-9
Here are the RJ-45 jack to wire colors on all of the adaptors I have used:
1 BLUE
2 ORANGE
3 BLACK
4 RED
5 GREEN
6 YELLOW
7 BROWN
8 WHITE
When pinning out the DB-9 connector, I typically start with BLACK on pin 2 and YELLOW on pin 3, RED always goes to pin 5. I usually do not use handshaking for my serial connections. If you are crossing TX & RX, swap the YELLOW and BLACK leads into the DB-9
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