Ring Communications DNA200 - Manual (Page 5)

DNA200 OPERATIONS MANUAL 5 2008/05/01
INSTALLATION
INTRODUCTION
The Digital Network Adapter (DNA200) interfaces an external RS232 or RS422 device to Ring Communications’
Crisis Alert System.
The DNA200 operates on +24 VDC. It can be powered from a fuse in the CB901 or RM5000 central exchange.
The recommended cord is the BF640A to connect the DNA200 to the RJ45 network jack, KB171. Cords and
jacks must be ordered separately.
123456 12345678
J3 J2 J1
RS422 RS232 RS485
Rear Panel Connectors
J1 - 8 pin (RJ45) Network connections:
Two modular jacks are provided at the rear of the DNA200. 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.