Symaro™ Room relative humidity and temperature sensor Modbus RTU QFA3150/MO Relative humidity (high accuracy) and temperature sensor with Modbus communication ● ● ● ● A6V12297472_en--_a 2021-03-25 Modbus RTU (RS-485) High measuring accuracy across the entire measuring range DIP switches setting together with other controllers With the AQF3100 accessory for outdoor use Smart Infrastructure
Use The sensor is used in ventilation and air conditioning plants where high accuracy and short response times for measuring temperature and relative humidity are required. The measuring range covers the entire humidity range of 0…100 %. Examples ● Storage and production facilities in the paper, textile, pharmaceutical, food, chemical and electronics industry, and so on.
Notes Engineering Powering the sensor requires a transformer for safety extra low-voltage (SELV) with separate windings for 100 % duty. When sizing and protecting the transformer, comply with all local safety regulations. When sizing the transformer, determine the power consumption of the room sensor. For correct wiring, see the datasheets of the devices with which the sensor is used. Observe permissible line lengths.
Technical data Function Communication Modbus RTU (RS-485) Supported baud rate 9600; 19200; 38400; 57600; 76800; 115200 Transmission format 1-8-E-1; 1-8-O-1; 1-8-N-1; 1-8-N-2 Bus termination 120 ohm, jumper selection For detailed information about specific functions, see Basic documentation (A6V12297475 *). Power supply Operating voltage AC 24 V ±20 % or DC 13.5…35 V (SELV) or AC/DC 24 V class 2 (US) Frequency 50/60 Hz at AC 24 V External supply line protection Fuse slow max.
Ambient conditions and protection classification Protection degree of housing EN 60529 ● ● Base unit Measuring tip ● ● IP65 IP40 ● Unit with outdoor mounting kit ● IP65 Protection class III according to EN 60730-1 Environmental conditions Transport ● Climatic conditions – Temperature – Humidity -40...70 °C < 95 % r.h. Operation ● Climatic conditions – Temperature (housing with electronics) -40...70 °C – 0…100 % r.h.
General Sensor (complete assembly) Silicone-free Packaging Corrugated cardboard Weight including package Approx. 169 g *) The documents can be downloaded from http://siemens.com/bt/download.
Diagrams Connection terminals G Operating voltage AC 24 V ±20 % or DC 13.5...
Dimensions Without AQF3100 With AQF3100 Dimensions in mm 8 Siemens Smart Infrastructure A6V12297472_en--_a 2021-03-25
Issued by Siemens Switzerland Ltd Smart Infrastructure Global Headquarters Theilerstrasse 1a CH-6300 Zug +41 58 724 2424 www.siemens.com/buildingtechnologies Document ID A6V12297472_en--_a Edition 2021-03-25 © Siemens Switzerland Ltd, 2021 Technical specifications and availability subject to change without notice.
