Ring-master – Ring Communications DNA100 User Manual
Page 8
April 2012 Digital Network Adapter DNA100
J3 - 6 pin (RJ11) RS422 signals :
A two twisted pair installation utilizing RS422 signals can be used to connect two bridges up to 7000 feet apart.
Use a six wire RJ11 cord with straight through wiring from J3 to another RJ11 jack on both sides of the
installation, and then use two twisted pairs between the two RJ11 jacks as shown in Figure C2.
A strap MUST be installed between RTS and CTS of J2 (DB9), in order to disable flow control for the RS422. To
do this, simply place a strap between pin 7 and pin 8 of J2. You could also solder this strap to a female DB9
connector with solder lugs on the rear, then insert it into the J2 connector. Figure C2 illustrates the strapping of
J2.
4
1
2
3
4
5
6
RX-
TX+
TX-
RX+
PTWISTED
PAIR
PTWISTED
PAIR
RX-
TX+
TX-
RX+
RS422
J3
7
8
RS232
J2
RTS
CTS
RS422
DEVICE
7000 FEET MAX.
Ring-Master