User Manual For DATCOM Components

30
Channels T1 /
T2
General explanation:
Channels T1 (15) and T2 (16) are used for temperature measurements
using PT1000 temperature sensors.
NOTE PT 100 temperature sensors are not permitted.
The analysis can take place on the display of the Fronius IG or Fronius IG
Plus as well as via the „Solar.access“ software. Channel T1 is used for
module temperature and channel T2 is used for ambient temperature.
Channel assignment example:
- Channel T1 (15) for module
temperature
- Channel T2 (16) for outside
temperature
Functional principle:
- Temperature sensors consist
of resistors that change their
resistance value in response to
changes in temperature
- The sensor card / box measu-
res the voltage drop at the
resistor when a constant cur-
rent is flowing through the
resistor
- The sensor card calculates the
temperature from this voltage
drop
Setup and installation example:
Temperature measurement at solar modules using PT1000 temperature
sensor at connection T1 (15).
- Attach PT1000 temperature sensor to solar module
- Connect PT1000 temperature sensor to T1
- Activate channel T1 (15) via the „Solar.access“ software
- Assign desired channel name (e.g. „Module Temperature“)
- Select unit (°C / °F)
NOTE The length of the sensor cable should not exceed 20 m
(65.6 ft) so that measurement results are not distorted.
(15) (16)