Cabling Requirements To Management System; Wiring Instructions For The Vsn800 Series; Supply 24Vdc Power - ABB VSN800 Product Manual

Run the cable back to the weather station unit and connect to the PV temperature sensor
terminals.
If the cable length is insufficient for the installation, additional
cable can be added to the existing cable. If this is done, an
accuracy derating factor must be added to the overall
temperature accuracy of this sensor. For every 100ft of cable
added, an accuracy derating factor of -0.125°C must be
taken into account.

Cabling requirements to management system

The maximum cable distance between weather station and the SunSpec-compliant
management system is 1000 m (3000 ft.).
High-voltage areas of power plants are "electrically noisy" environments so shielded cable is
advised for connection from the weather station to RS485. If outdoor exposure or proximity to
a noise source is a concern, Beldon 1120A or equivalent cabling should be used.
Cables to external sensors are supplied with the sensor.

Wiring instructions for the VSN800 series

Supply 24VDC Power

1.
2.
Four Screws to Remove
Front Cover
Run wire from the 24VDC power source to the weather station.
Find the back of the connection case on the weather station. Unscrew the four
retaining screws at the corners with a Philips screwdriver. See the figure below.
Weather Station Connection Case (Back View)
VSN800 Weather Station Product Manual
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