User’s Manual
PAGE 4
Technical support
(650) 384-0000
www.avalanwireless.com
AW900R2-PAIR
Electrical Connections
The AW900R2-PAIR 900 MHz Outdoor Wireless RS-232 Bridge contains two each of
the following items:
• Outdoor wireless RS-232 radios
• AW2-900 Omnidirectional Antennas
• RJ-45 to Screw Terminal 30 foot cables
• DB-9 Female to Screw Terminal breakout adapters
• 20” USB to Mini-USB Adapter Cables
• 120VAC to 12 VDC Wall Hanger Power Supplies
Antennas or other useful accessories such as pole-mounting brackets may be pur-
chased from AvaLAN Wireless or our distributors.
To power up a radio, make connections to it as shown in this diagram:
Connect both ends of the wireless link to their respective RS-232 devices, power
supplies and antennas in similar fashion. The radios use an RJ-45 connector for
data because they leverage the weatherproof solution already developed for our
Ethernet products. If the length or termination method of the cable supplied does
not meet your needs, an inexpensive CAT5 cable can be used by installing an RJ-45
plug on the radio end and terminating the other end however you need.
Provide some physical separation between two radio module antennas — at least
ten feet. If their antennas are in close proximity, the module radio receivers will be
overloaded, causing degradation in the bit error rate and slower link performance.
900 MHz
Antenna
RS-232
Data
Source
White-striped
wire: +12 VDC
Plain black
wire
Transmit
Receive
Ground
Rx (orange twisted pair)
+
(blue twisted pair)
Tx (green twisted pair)
GND (brown twisted pair)
Terminal Block
30’ Cable
Screw Terminals
to RJ-45
Weatherproof
Sealing Gland
12 VDC Power Supply
