National Semiconductor • SolarMagic Weather Station User Guide
16
Mount the base or mast for the weather station to a secure surface and
install guy wires if possible. It is very important to ground the mast or
base station for proper safety.
Attach the sensor frame to the base/mast.
4.1.3
Installing the Communication and Power
CAUTION:
Turn Off Monitoring Panel
Before proceeding, make sure the power for the communication module and the
main Monitoring Panel (Internet Gateway / Data Logger) is switched off.
Connect the Modbus RS-485 communication cable (National
Semiconductor recommends a size of stranded copper #22AWG
twisted pair with shielding and drain wire) from the system manager
enclosure to one pair of the DATA+ and DATA– terminals. Connect
the shield drain wire to the shield terminal. Note this is not connected
to ground and the drain wire should only be connected to ground at
one point, typically in the system manager enclosure. The other pair of
Data + and Data – terminals is available for continuing the Modbus
data connection to another device.
Connect the weather station to the power supply using one pair of the
+Vs and GND terminals. The wire size for the 24Vdc power can be
determined using the specifications in the system manager User
Guide. The other pair of +Vs and GND terminals is available for
continuing the 24Vdc power connection to another device.
4.1.4
Installing the Weather Sensor Wires
Install your weather sensors so that they are easily accessible for
calibration purposes. You may need to clean, remove and/or reinstall
them in the future, so plan ahead!
NOTE:
Sensor Cable Length
Most sensors are shipped with a 25ft sensor lead cable. Make sure that the sensor
cables will reach. The sensor lead wires can be extended to a maximum length of
400ft if stranded #22AWG or larger wires are used. If you extend or cut the sensor
wires, be sure to mark which sensor the wire is connected to.
Using a step bit or a 1/2" drill bit, drill one hole into the enclosure for
each sensor. Refer to the sensor references for recommended strain
relief placement. Using this order for the sensors will allow for cleaner
and easier wiring inside the enclosure.
!
Summary of Contents for SolarMagic
Page 1: ...SolarMagicTM Weather Station User Guide...
Page 4: ......
Page 32: ......
Page 33: ...Appendix A Reference Diagrams 27 Appendix A Reference Diagrams...
Page 34: ...National Semiconductor SolarMagic Weather Station User Guide 28 A 1 1 Sensor Terminal Blocks...
Page 35: ...Appendix A Reference Diagrams 29 A 1 2 Communications Power Terminal Block...