Ring Communications DNA300 - Manual (Page 6)

DNA300 OPERATIONS MANUAL 6 2006/06/13
J1 - 8 pin (RJ45) Network connections :
Two modular jacks are provided at the rear of the DNA300. Use modular cables with straight through pin
configuration only! An 8-pin (RJ45) modular jack (KB171) and cord (BF640A) are required for connection to the
network.
PIN# - DESIGNATION
1 - No connection.
2 - +12 VDC power input
3 - Data + (positive)
4 - No connection.
5 - No connection.
6 - Data - (negative)
7 - -12 VDC power input
8 - External Alarm.
The maximum total network length is 7000 feet. A unshielded twisted pair cable should be used for the data pair (24
or 22 AWG).
Connect the DATA pair from the network to pins 3 and 6 of the RJ45 wall jack maintaining polarity of the pair.
If a remote power source is being used, the negative side of the supply must be referenced to Earth Ground, as well
as, the CB901 power supply.
J2 - 9 pin (DB9) RS232 signals :
The DNA300 has a RS232 serial port interface, J2, that can connect to a terminal, printer, or video switcher. Check
your terminal, printer or video switcher manual for the correct RS232 connector type, input, output and handshaking
signal connections.
The maximum length for a RS232 cable connecting the DNA300 and other equipment is 50 feet.
A null-modem (LapLink) cable can be used to connect a DNA300 and a laptop or computer together if they are
close enough to each other.
If you are going to make your own cable the following is a description of the pinout of the DB9 connector on the
DNA300.
J2 SIGNAL DIRECTION/
PIN# NAME DESIGNATION
1 DCD Data Carrier Detect, input.
2 RXD Receive Data, input.
3 TXD Transmit Data, output.
4 DTR Data Terminal Ready, output.
5 GND Signal Ground.
6 DSR Not used.
7 RTS Request to Send, output.
8 CTS Clear to Send, input.
9 RI Not used.