Issue
What 10k Thermistor sensors are compatible with the I/A Series MNL and MNB families of controllers?
Product Line
TAC IA Series, Andover Continuum
Environment
- I/A Series LON Controllers (MNL-xxxxx)
- I/A Series BACnet Controllers (MNB-xxxxx)
- Continuum 10K T3 Sensors
Cause
Specification information
Job spec requires a specific family of sensors. Need to know how to compare the TC curves.
Resolution
Compatible sensors that have a built-in 11k shunt resistor include the TS-5711-850, TS-57011-850, TS-57031-850, and TSMN-90110-850 Series. NOTE: These sensors are no longer available for purchase. The TW2XAXK is the replacement
Any sensor that matches resistance to temperature curve for a 10K Thermistor Type G (U.S.Sensor), Type 9 (Dale/Vishay) or Type III (ACI Series AH) can be used with the I/A Series MNL and I/A Series MNB series controllers, provided that a 11k ± 0.1% 1/8 watt resistor is wired in parallel with the sensor.
The input has a range of -10 to 135 °F (-23.3 to 57.2 °C) with an accuracy of ±1% of span.
This includes the Continuum 10K T3 sensors. The table below shows that the resistance in its normal operating range is within a few ohms of the TSMN non 11K shunted sensors. The Continuum sensor can be used with a parallel 11K ohm resistor.
The full temperature / resistance table for the US Sensor 10K Thermistor R-T Curve Type G sensor can be found here. Please note that the controller may not be able to use the full temperature range shown in the table.
