Rj11 Serial Cables And Loopback Plugs; Rj11 Signals; Rj11 Null-Modem Cable (Rs-232); Rj11 Null-Modem Cable (Rs-422 Or Rs-485 Full-Duplex) - Comtrol RocketPort INFINITY User Manual

RJ11 Serial Cables and Loopback Plugs

RJ11 Signals

RJ11 Null-Modem
Cable (RS-232)
RJ11 Null-Modem
Cable (RS-422 or RS-
485 Full-Duplex)
RocketPort INFINITY User Guide: 2000465 Rev. G
This section describes RJ11 cables and loopback plugs for the RocketPort
INFINITY 8J.
• RJ11 Signals
•

RJ11 Null-Modem Cable (RS-232)

•

RJ11 Null-Modem Cable (RS-422 or RS-485 Full-Duplex)

• RJ11 Straight-Through Cable (RS-232 or RS-485 Half-Duplex)
• RJ11 Loopback Plugs
There are no standards for RJ11 connector pinouts. Refer to the
manufacturer's installation documentation if you need help with
connector pinouts or cabling for the serial device.
Note: Ring indicator, Request to Send, and Data Set Ready are not
supported on the RJ11 connector.
RJ11 Connector Signals
Pin RS-232
1 DTR
2 SIG GND
3 TxD
4 RxD
5 DCD
6 CTS
Ground must be tied to signal ground.
Use the following figure if you need
to build an RS-232 null-modem
cable. A null-modem cable is
required for connecting DTE devices.
Use the following figure if you need to build
an RS-422 null-modem cable. A null-modem
cable is required for connecting DTE devices.
Note: RS-422 pinouts are not standardized.
Each serial manufacturer uses
various pinouts. Please refer to the
documentation for the serial to
determine the pinouts for the signals
in the previous picture.
on Page 19
on Page 20
RS-485
RS-422
(Full-Duplex)
TxD+ TxD+
SIG GND SIG GND
TxD- TxD-
RxD- RxD-
Not Used Not Used
RxD+ RxD+
RocketPort
RS-232
RJ11
Signal
Pins
TxD
RxD
CTS
DTR
DCD
GND
RocketPort
Connecting Serial Devices
on Page 19
on Page 20
RS-485
(Half-Duplex)
TRxD+
SIG GND
TRxD-
Not Used
Not Used
Not Used
DTE Serial Device
DB9
DB25
Pins Pins
3
2
4
3
6
7
1
1
5
14
2
5
RS-422/RS-485FD
RJ11
Signal
Pins
TxD+ 1
TxD- 3
RxD+ 6
RxD- 4
Connecting Serial Devices - 19
Signal
RxD
3
TxD
2
RTS
4
DCD
8
DTR
20
GND
7
DTE Serial
Device
Signal
RxD+
RxD-
TxD+
TxD-