Components of the short haul kit used for external connections at the computer are:
(1) RAD modem
(1) 1.5 m (5 ft) 4-wire patch cable
(1) 3 m (10 ft) 14 AWG ground wire
(1) Surge protector and case
(1) 9-25 pin RS-232 serial cable
Use the following procedure to install the short haul modems (
1. Connect the 6 m (20 ft) patch cable to the COM connector on the back side of the
enclosure. Splice the patch cable to the user-supplied cable, using the direct burial splice
kits.
NOTE:
The splice and wire nut must be completely immersed into the silicone gel inside the
splice tube to be waterproof.
2. Mount the surge protector box to a flat surface within 1.5 m (5 ft) of the serial port on the
computer. Ground the center terminal to an earth (or building) ground using the 14 AWG
wire.
3. Connect the 1.5 m (5 ft) patch cable from the surge box to the RAD Modem. Fasten the
cable to the strain relief tab with a cable tie. Use the 9-to-25 pin serial cable to connect the
modem to the serial port on the computer.
4. Route the user-supplied cable from the remote splice to the surge protector. Connect it
and the 1.5 m (5 ft) patch cable to the surge protector.
6.7.4 Radio
Radios enable wireless communications between a data logger and computer. Maximum range
is 0.8 to 21 km (0.5 to 13 miles). This is determined by radio model, antennas used, line of site, and
interference. Radio communications using the
SmartWeather
alarm systems require an SC932A
RS-232 DCE Interface and a field power cable. The SC932A is connected between the radio
RS-232 port and the WS-PRO2 CS I/O port. For the field power cable, the barrel plug connects to
the radio and the two-conductor pigtail connects to the 12V and G terminals of the WS-PRO2.
This section provides instructions for RF407, RF412, RF422, RF451 and most radios offered by
Campbell Scientific.
Section 6. Installation
41
Summary of Contents for WS-PRO2
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