Outdoor sensor for measuring relative humidity and temperature in HVAC applications, greenhouses, industrial halls and in meteorology. The output can also be configured to measure absolute humidity, enthalpy or dew point. The optional features, such as relay outputs for 2-point controllers or 2-stage 2-point controllers and an LCD with traffic light indication enable a wide range of applications. Depending on the model, the FTA54+ can be configured individually via Thermokon USEapp. The accuracy of the humidity sensor is 2%. A hinged cover and tool-free wiring as well as removable cable entries ensure a quick and easy installation.

Measured valueshumidity, temperature
Output voltageVV | VVS: 2x 0..10 V (min. load 10 kΩ)
Output currentAA | AAS: 2x 4..20 mA (max. load 500 Ω)
Output passiveVVS | AAS: passive temperature sensor
Output switch contactRelay: 2x floating contact NO for 24 V ~ or 24 V = / 3 A, optional
Network technologyRS485 BACnet (MS/TP), LON FT (free topology), RS485 Modbus, UNI Modbus RTU
Power supply15..24 V = (±10%) or 24 V ~ (±10%) SELV, AA | AAS: 15..24 V = (±10%) SELV, LCD/relay/BUS: 15..35 V = or 19..29 V ~ SELV
Power consumptionVV | VVS: max. 0,3 W (24 V =) | 0,5 VA (24 V ~), AA | AAS: max. 40 mA (24 V =), LCD/relay/BUS: max. 2,5 W (24 V =) | 4,3 VA (24 V ~)
Measuring range temp.-40..+60 °C | 0..+50 °C | -20..+80 °C | -15..+35 °C, adjustable at the transducer, LCD/relay/RS485 Modbus: optionally configurable via app or uConfig, default setting: -20..+80 °C, passive: depending on used sensor
Measuring range humidity0..100% rH non-condensing, enthalpy: 0..85 KJ/kg, absolute humidity: 0..50 | 0..80 g/m³, dew point: 0..+50 | -20..+80 °C, adjustable at the transducer, LCD/relay/RS485 Modbus: optionally configurable via app or uConfig
Accuracy temperaturepassive: depending on used sensor, ±0,3 K (typ. at 21 °C within default measuring range)
Accuracy humidity±2% between 10..90% rH (typ. at 21 °C)
DisplayLCD 29x35 mm with RGB backlight, optional
Enclosureenclosure USE-M, PC, pure white, LCD: cover PC, transparent
Protection (IP)IP65 according to EN 60529
Cable entryFlextherm M20 for wire Ø=4,5..9 mm, Relay/BUS: M25 with fourfold cable entry for wire with max. Ø=7 mm, removable
Electrical connectionremovable plug-in terminal, max. 2,5 mm², BUS terminal: removable plug-in terminal, max. 1,5 mm²
PipePC, pure white
Filterstainless steel wire mesh
Ambient condition-20..+70 °C, max. 85% rH short term condensation
Delivery contentincl. mounting base enclosure USE-M pure white, incl. rain protection PA6, white
Notesother temperature sensors on request

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Thermokon Sensortechnik GmbH
Platanenweg 1
35756 Mittenaar
Tel.: +49 2778 6960-0

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