Issue
Replacing a SHR humidity sensor when set as 4-20mA loop powered (2 wire).
Product Line
Field Device
Environment
- SHR100-T*
- SpaceLogic SLA****
Cause
When replacing a SHR100-T* sensor, there are only 2 wires and the sensor is set to loop powered for measuring humidity.
Resolution
The SLA sensor when used for measuring humidity and is only available as a 3 wire device when used with both 24Vac or 24Vdc (20-30Vdc) for measuring humidity, these are: power, ground and signal.
Either use a 3rd wire if available or use an alternative device.
Download the SpaceLogic Sensor Installation Sheet
