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AX-RHT-SM / RH & T Transmitter over RS485 Modbus ,2.5% accuracy POA Qty
AX-RHT-SMD / RH & T Transmitter over RS485 Modbus ,2.5% accuracy ,with LCD POA Qty
AX-RHT-SM2 / RH & T Transmitter over RS485 Modbus ,2% accuracy POA Qty
AX-RHT-SM2D / RH & T Transmitter over RS485 Modbus ,2% accuracy ,with LCD POA Qty
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The AX-RHT-SM is a range of Room Relative Humidity & Temperature transmitters with Modbus RTU output. An integrated LCD display is available as an option. Wiring is simplified with connections all made on the back-plate,and a plug-in electronics housing. Communication parameters can be configured locally using dipswitches or over the network.Options for this range of sensors include the addition of various passive temperature sensors for most BMS systems.
Product Features
• 2.5% Accuracy standard
• Isolated RS-485 output
• Optional 2-Line LCD display
• Optional thermistor output for temperature

Power Supply
24Vac ±10% or 24Vdc ± 10%
Sensor Type / Protection
RH
Output
RS485 Modbus RTU
*See ‘NETWORK COMMUNICATION DETAILS’ for more information

Output Range - RH
0 to 100% RH
Output Range - Temperature
-10°C to +40°C
RH Accuracy
±2.5% typical (20 to 80% RH at 25°C), ±2.0% option
Temperature Accuracy
±0.3°C typical
Long Term Stability
±1% RH at 50% RH in 5 years
Repeatability / Hysteresis
±0.5% RH / ±1% of span max
Response Time
15 seconds @ 25°C, but dependant on airflow
Display option
3 digit, 2 line, 6mm character height LCD display of RH and Temperature
Terminals
Rising clamp 0.5-1.5mm˛ cable
Ambient Temperature Range
-10°C to 50°C, 0-95% RH
Dimensions, Weight & Ingress
87 x 82 x 27mm, 75g, IP20
Country of origin
United Kingdom

AX-RHT-SM.pdf / RH & T Transmitter over RS485 Modbus