Siemens Building Technology 540-680FA Sensor 324846-701 Use the R8110 or R9110

Use the R8110 or R9110 series for D

using this OEM Laars replacement part ensures the system maintains its original thermal efficiency and safety parameters

This OEM control transformer features standard mounting footprints for a direct-drop replacement

The atmospheric port serves as a fail-safe

Which ports do I use for a differential pressure setup

Siemens Building Technology 540-680FA Sensor 324846-701 Use the R8110 or R9110The Siemens Building Technology 540 680FA is a Series 1000 wall mounted room temperature sensor designed for seamless integration with Terminal Equipment Controllers (TEC) and LONMARK compliant systems. This desert beige unit features a high precision 10K Ohm Type II NTC thermistor, ensuring accurate thermal feedback within a standard operating range of 55F to 95F. Engineered for professional grade HVAC automation, the 540 680FA includes a secondary