RS232 Port Wiring (RJ45 to DB9M)

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Industrial
Product Catalog

RS232 Port Wiring (RJ45 to DB9)

The information in this topic applies to the following SIXNET products only:

VersaTRAK IPm RS232 ports A and B
Mini-VersaTRAK mIPm RS232 port B
Micro-VersaTRAK µIPm RS232 port B
SixTRAK IPm RS232 ports A and B
SixTRAK I/O Controller (ST-GT-1210) RS232 port
EtherTRAK I/O Concentrator (ET-GT-ST-2) RS232 port
Dual Ethernet Gateway (ET-GT-ST-3) RS232 port
RemoteLog serial version (SR-4160-1S-1) RS232 port

The products above are supplied with at least one RJ45 to DB9 adapter.

When connecting a modem, insert the colored wires of the RJ45 to DB9 male adapter into the appropriate sockets of the DB9 male connector according to the table below. Then plug the adapter’s DB9 male connector directly onto the DB9 RS232 port of a VT-MODEM-xxx. Connect a straight-through Ethernet cable between the SIXNET RJ45 port and the RJ45 to DB9 male (modem) adapter.

When connecting a PC there are two choices:

Connect a straight-through Ethernet cable between the SIXNET RJ45 port and the prewired RJ45 to DB9 female adapter (part number: RJ45-DB9F-IPM).
Insert the colored wires of the unwired RJ45 to DB9 female adapter into the appropriate sockets of the DB9 female connector according to the second table below. Plug the adapter’s female DB9 connector onto your PC.

The RJ45 serial port connector bodies on some SIXNET products are metallic and are connected to the Chassis GND terminal. Therefore, shielded cables may be used to provide further protection. To prevent ground loops, the cable shield should be tied to the metal connector body at one end of the cable only.

Note: The SIXNET RJ45 port pinouts are EIA/TIA-561 compliant.

Typical Modem Adapter Wiring:
SIXNET	RJ45F to DB9M	SIXNET
RJ45F Pin #,	Adapter	DB9 Male Connector
Signal Name	wire color	Pin #, Signal Name
1 RI/DSR in	Blue	9 RI out
2 DCD in	Orange	1 DCD out
3 DTR out	Black	4 DTR in
4 GND	Red	5 GND
5 RXD in	Green	2 RXD out
6 TXD out	Yellow	3 TXD in
7 CTS in	Brown	8 CTS out
8 RTS out	White	7 RTS in

$image\eth_rj45_wmf.gif$ $image\db9m_wmf.gif$

Typical PC Adapter Wiring:

SIXNET	RJ45F to DB9F
RJ45F Pin #,	Adapter	DB9 Female Connector
Signal Name	wire color	Pin #, Signal Name
1 RI/DSR in	Blue	4 DTR out
2 DCD in	Orange	N/C
3 DTR out	Black	6 DSR in
4 GND	Red	5 GND
5 RXD in	Green	3 TXD out
6 TXD out	Yellow	2 RXD in
7 CTS in	Brown	7 RTS out
8 RTS out	White	8 CTS in

$image\eth_rj45_wmf.gif$ $image\db9f_wmf.gif$