Connecting The Ambient Temperature Sensor To The Sunny Sensorbox - SMA SUNNY SENSORBOX Installation Manual

Accessories
13.4.5 Connecting the Ambient Temperature Sensor to the Sunny
SensorBox
Connection in the Ambient Temperature Sensor
Cable length when connecting in a 4-conductor technology
In order to ensure accuracy even over longer distances, we recommend to connect the
PT100 sensor resistor in a 4-conductor technology. The cable length may not exceed 98 ft.
1. Unscrew the 4 screws on the sensor enclosure, and remove the lid.
2. Unscrew the cable gland on the bottom of the sensor enclosure against a counterclockwise
direction.
3. Remove the interior small protection plates. Make sure that the interior seal does not fall out.
4. Screw the cable gland halfway onto the sensor enclosure in a clockwise direction.
5. Thread the cable through the cable gland of the sensor.
6. Open the screw terminals in a counterclockwise
direction.
7. Connect the insulated conductors to the sensor's
terminals.
Write down the color of the insulated conductors:
I+:__________________________
V+:__________________________
V-:__________________________
I-:__________________________
8. Close the screw terminals in a clockwise direction.
9. Pull the insulated conductor to check that it is
securely in place.
10. Screw the sensor's cable gland hand-tight in a
clockwise direction into the sensor enclosure (torque: 7 in-lbs).
11. Plug the cables from the sensor lid onto the plugs.
The polarity of the cables is arbitrary.
Connection to the Sunny SensorBox
12. Open the Sunny SensorBox as described in section
10.1 "Opening the Sunny SensorBox" (page 51).
64 Sensorbox-IUS084413
SMA Solar Technology AG
Installation Guide