Campbell Scientific UT20 and UT30 Tower-based Weather Stations - Manual (Page 44)

UT20 and UT30 Tower-based Weather Stations
the RF500M. Set the appropriate configuration options in the RF500M
with DevConfig depending on the port connected to the PC.
8.3.5.3 Install Nearest Repeater/Field Station
Now install the nearest field station. If it communicates with the base station
via a repeater, the repeater station must also be installed. Make sure the correct
RF ID has been configured in the RF500M that is being deployed in the remote
field station or repeater location.
Following is the order in which a general RF field station should be installed.
A repeater station is installed in the same order.
1. Tripod or tower
2. Enclosure and datalogger
3. Antenna – Orient correctly; remember direction and polarization
4. Solar Panel
5. Power Supply
6. Sensors
7. RF Modem – Configure the RF ID according to the site map
8. Radio – Make sure to connect to RF Modem, to power supply, and turn on
power supply
8.3.6 MD485 Multidrop Interface
Campbell Scientific’s MD485 is an intelligent RS-485 interface that permits a
PC to address and communicate with one or more dataloggers over a distance
of 4000 ft. The distance between the datalogger and computer can be increased
by combining it with a phone modem, Ethernet link, or spread spectrum radio.
8.3.6.1 MD485 Multidrop Interface at the Datalogger
1. Mount the MD485 to the enclosure backplate via its onboard bracket.
2. Attach the SC12 cable’s female connector to the MD485’s CS I/O port.
3. Attach the SC12’s male connector to the CR1000’s CS I/O port.
4. Attach the CABLE3CBL cable to one of the MD485’s RS-485 ports.
8.3.6.2 MD485 Multidrop Interface at the Computer
1. Connect the CABLE2TP-L to one of the MD485’s RS-485 ports.
2. Attach one end of the pn 10873 RS-232 cable to the MD485’s RS-232
port.
3. Attach the other end of the pn 10873 RS-232 cable to the computer’s RS-
232 port.
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