STR602 terminal detail


Insufficient information for the STR602 terminal detail / assignment

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The installation instructions does not give insufficient information regarding the connections of a STR602 sensor.


The STR602 combines the RPW4425 and DRT3453 into one temperature and setpoint unit. The STR602 is a 3 wire device using a common 0V between the setpoint adjust potentiometer and the temperature sensing negative co-efficient thermistor.

The terminations are:

STR602 term 22 (Setpoint)

STR602 term 23 (Temp 'C)

STR602 term 24 (0Vcom) - this is the common of both the temperature sensor and the setpoint potentiometer.

Setpoint Resistance (for BAS/Sigma use Lookup table 1, for SmartStruxure use the Satchwell thermistor )

Sensor Resistance  (for BAS/Sigma use Lookup table 1, for SmartStruxure use the Satchwell thermistor )