
Siemens Building Technology 540-680FA Sensor
The 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 55°F to 95°F. Engineered for professional-grade HVAC automation, the 540-680FA includes a secondary manual setpoint adjustment slide and a flush-mounted override button, allowing occupants to trigger temporary occupied modes without central intervention. The integrated Fahrenheit LCD display provides real-time local temperature monitoring, essential for commercial office and school environments. For streamlined field service, the sensor includes an RJ-11 communication port, providing technicians with a direct access point to the controller's database for rapid troubleshooting and configuration. Its 6-pin connectivity and standard 18-22 AWG twisted pair compatibility make it a reliable drop-in replacement for legacy Siemens building automation installations.
Key Benefits- Precise Thermal Monitoring: Utilizes a 10K Ohm NTC Type II thermistor for stable resistance-based temperature sensing.
- User-Interface Flexibility: Equipped with an intuitive setpoint slider and a durable override button for local zone control.
- Technician-Ready Design: Built-in RJ-11 port allows for "plug-and-play" communication with portable operator terminals.
- Simplified Installation: Designed for standard wall-box mounting with a secure terminal block for clean wiring terminations.
Is this sensor compatible with non-TEC controllers?
This specific model is optimized for Siemens Terminal Equipment Controllers (TEC) using 10K Ohm thermistor inputs. For RTD-based systems like MBC or RBC, different sensing elements are required.
What is the maximum recommended wiring distance?
For optimal signal integrity and to prevent resistance drift, the recommended cable run length is 100 feet using standard 6-conductor room sensor cables.
Does this unit require external power or batteries?
The 540-680FA is powered directly through the controller's 6-pin connection, eliminating the need for periodic battery replacement or external power supplies at the sensor location.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $559.69
-65%$559.69
$195.89Siemens Building Technology 540-680FA Sensor
The 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 55°F to 95°F. Engineered for professional-grade HVAC automation, the 540-680FA includes a secondary manual setpoint adjustment slide and a flush-mounted override button, allowing occupants to trigger temporary occupied modes without central intervention. The integrated Fahrenheit LCD display provides real-time local temperature monitoring, essential for commercial office and school environments. For streamlined field service, the sensor includes an RJ-11 communication port, providing technicians with a direct access point to the controller's database for rapid troubleshooting and configuration. Its 6-pin connectivity and standard 18-22 AWG twisted pair compatibility make it a reliable drop-in replacement for legacy Siemens building automation installations.
Key Benefits- Precise Thermal Monitoring: Utilizes a 10K Ohm NTC Type II thermistor for stable resistance-based temperature sensing.
- User-Interface Flexibility: Equipped with an intuitive setpoint slider and a durable override button for local zone control.
- Technician-Ready Design: Built-in RJ-11 port allows for "plug-and-play" communication with portable operator terminals.
- Simplified Installation: Designed for standard wall-box mounting with a secure terminal block for clean wiring terminations.
Is this sensor compatible with non-TEC controllers?
This specific model is optimized for Siemens Terminal Equipment Controllers (TEC) using 10K Ohm thermistor inputs. For RTD-based systems like MBC or RBC, different sensing elements are required.
What is the maximum recommended wiring distance?
For optimal signal integrity and to prevent resistance drift, the recommended cable run length is 100 feet using standard 6-conductor room sensor cables.
Does this unit require external power or batteries?
The 540-680FA is powered directly through the controller's 6-pin connection, eliminating the need for periodic battery replacement or external power supplies at the sensor location.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The 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 55°F to 95°F. Engineered for professional-grade HVAC automation, the 540-680FA includes a secondary manual setpoint adjustment slide and a flush-mounted override button, allowing occupants to trigger temporary occupied modes without central intervention. The integrated Fahrenheit LCD display provides real-time local temperature monitoring, essential for commercial office and school environments. For streamlined field service, the sensor includes an RJ-11 communication port, providing technicians with a direct access point to the controller's database for rapid troubleshooting and configuration. Its 6-pin connectivity and standard 18-22 AWG twisted pair compatibility make it a reliable drop-in replacement for legacy Siemens building automation installations.
Key Benefits- Precise Thermal Monitoring: Utilizes a 10K Ohm NTC Type II thermistor for stable resistance-based temperature sensing.
- User-Interface Flexibility: Equipped with an intuitive setpoint slider and a durable override button for local zone control.
- Technician-Ready Design: Built-in RJ-11 port allows for "plug-and-play" communication with portable operator terminals.
- Simplified Installation: Designed for standard wall-box mounting with a secure terminal block for clean wiring terminations.
Is this sensor compatible with non-TEC controllers?
This specific model is optimized for Siemens Terminal Equipment Controllers (TEC) using 10K Ohm thermistor inputs. For RTD-based systems like MBC or RBC, different sensing elements are required.
What is the maximum recommended wiring distance?
For optimal signal integrity and to prevent resistance drift, the recommended cable run length is 100 feet using standard 6-conductor room sensor cables.
Does this unit require external power or batteries?
The 540-680FA is powered directly through the controller's 6-pin connection, eliminating the need for periodic battery replacement or external power supplies at the sensor location.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.












