Issue
Confusion over the thermistor type selection for an EBO Temperature Input object
Product Line
EcoStruxure Building Operation
Environment
- Building Operation I/O Module
- Building Operation Automation Server Bundled
- Building Operation Multi-purpose Controller (MPC)
- Building Operation Room Controller (RPC)
- Building Operation IP-IO
Cause
The Thermistor type selection lists sensor "Types" I through V
This is confusing since, for example, the Continuum sensor is listed as 10k Type I but in manufacturers literature and temperature vs resistance tables is often referred to as 10k Type 3
Resolution
The reference to Thermistor 10k Type in the selection list is an internal reference and not intended to refer to the types listed in manufacturers literature and temperature vs resistance tables. For reference the selections refer to the following sensor types:
- Thermistor 10k Type I (Continuum) – Thermistor 10K4A1 also referred to as 10K Type 3 - SpaceLogic Sensors (as SLASXXX, SLAWXXX and SLABXXX), STx5xx Sensors (see HVAC Sensor catalog for details)
- Thermistor 10k Type II (I/NET) – Thermistor 10K2A1 Dale/Vishay - STx20x Sensors (see HVAC Sensor catalog for details)
- Thermistor 10k Type III (Satchwell) – Thermistor 10K3A1 (No Longer Applicable for Satchwell sensors)
- Thermistor 10k Linearized (Satchwell DxT - Type T) - STx6xx Sensors (see HVAC Sensor catalog for details)
- Thermistor 10k Type IV (FD) – Thermistor 10K4A1 type ‘G’ (U.S. Sensor)
- Thermistor 10k Type V (FD w/ 11k shunt ) – Thermistor 10K type ‘G’ (U.S. Sensor) with external 11k ohm shunt resistor installed
- Thermistor 1.8k (Xenta) – Thermistor type 1.8KA1 - STx1xx Sensors (see HVAC Sensor catalog for details)
- Thermistor 1k (Balco) – (not a thermistor) RTD, 1000 ohm Balco
- Thermistor 20k (Honeywell) – Thermistor 20K6A1 type H
- Thermistor 2.2k (Johnson Controls) – 2.2K3A1
Refer to the Temperature Sensor Resistance Charts Knowledge Base article for temperature vs resistance charts for these sensor types and others.
