Ring Communications DNA300 - Manual (Page 7)

DNA300 OPERATIONS MANUAL 7 2006/06/13
J3 - 6 pin (RJ11) RS422 signals :
A two twisted pair installation utilizing RS422 signals can be used to connect two devices 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 installa-
tion, and then use two twisted pairs between the two RJ11 jacks.
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. illustrates the strapping of J2.
Setting Baud Rate / Selecting Device Type
DIP switches SW3-1 through SW3-6 are used to set the desired baud rate for the RS232 device. SW3-7 and
SW3-8 are used to select the RS232 device the DNA300 is driving (see chart below).
SW3
Baud Rate
1 2 3 4 5 6 ___DEVICE _ _ 7 8
19200 1 0 0 0 0 1 I/O Module 0 0
9600 1 0 0 0 1 0 Not used 0 1
4800 0 1 0 0 0 1 0=off Not used 1 0
2400 0 1 0 0 1 0 1=on Not used 1 1
1200 1 0 0 0 1 1
Communication Protocols
Hardware flow control is used (RTS/CTS). The DNA300 will send data only if CTS is high from the connected
device. Parity, Data Bits and Stop Bits are programmable (see configuration section).
Defaulting Configuration Memory
Set DIP switch SW2 1-8 to off . Push RESET. Master light will start to flash, indicating that memory is default.
Set Network and Node Address. Push Reset. The DNA300 is now ready to be configured.
Setting Network and Node Address
DIP switch SW2 is used to set the address of the DNA300. See S
ETTING
N
ETWORK
A
DDRESS
of Chapter A -
N ETWORK for a full description for setting addresses, as well as, an addressing chart.