SMA PT100M-NR - Manual (Page 7)

SMA Solar Technology AG Unpacking
Installation Guide PT100MNR-IEN083510 7
3 Unpacking
3.1 Packing List
PT100M-NR
3.2 Identifying the Module Temperature Sensor
The module temperature sensor can be identified by measuring the measurement resistance. The
nominal resistance equals R0 =100 Ω (at 0 degrees).
4 Installation and Electrical Connection
The PT100M module temperature sensor can be connected to the Sunny Boy Control Plus, the Sunny
Central or the Sunny SensorBox. Take into account the prefabricated cable length of 2.5 m. If the
cable length is insufficient, you can extend it using a junction box, for example over a 2 or 4-wire
system.
A 1 PT100M (module temperature sensor with 2.5 m cable)
B 1 Thermally conductive adhesive (protective gloves, hardener and binder)
C 2 Adhesive tape strips
2-wire system
When connecting the temperature sensor in a
2-wire system, the cable resistance is included in
the measurement. Depending on the cable
length, this can lead to inaccuracies when
measuring.
The 2-wire system should therefore only be used with short cable lengths (maximum 3 m)
or where the necessary degree of measuring accuracy is not as high. In order to improve
the measuring accuracy, the use of a 4-wire system is recommended.
A
B
C