Specifications

Section 3. Instrumentation Installation
5. Connect a null modem cable from the computer serial port to the R
port of the RF500M. If a digital radio is being used on the R
S-232
S-232 port,
an SC532 and serial cable can be used between the PC and the CS I/O port
options in the RF500M
with Device Configuration Utility depending on the port connected to the
3.3.5.3 Inst
rization
o connect to RF Modem, to power supply, and turn on
3.3.6 MD485 Mu
nicate with one or more dataloggers over a distance
of 4000 ft. The distance between the datalogger and computer can be
spec
3.3.6.1 MD485 Multidrop Interface at the Datalogger
1. Mount the MD485 to the enclosure backplate via its onboard bracket.
ort.
of the RF500M. Set the appropriate configuration
PC.
all 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 pola
4. Solar Panel
5. Power Supply
6. Sensors
7. RF Modem - Configure the RF ID according to the site map
8. Radio - Make sure t
power supply
ltidrop Interface
Campbell Scientific’s MD485 is an intelligent RS-485 interface that permits a
PC to address and commu
increased by combining it with a phone modem, Ethernet link, or spread
trum radio.
2. Attach the SC12 cable’s female connector to the MD485’s CS I/O p
3. Attach the SC12’s male connector to the datalogger’s CS I/O port.
4. Attach a twisted pair cable such as the CABLE3CBL to one of the
MD485’s RS-485 ports.
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