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[. . . ] H7508A
COMBINED OUTSIDE AIR HUMIDITY/ TEMPERATURE SENSOR
PRODUCT DATA
FEATURES
· · · · Pt 1000, BALCO 500 or NTC temperature sensing element Wide sensing range Capacitance type sensing element for relative humidity Special housing for outside application
SPECIFICATION
General: Power supply 24Vac, +20. . . -30%; 50/60Hz, 34Vdc, +20. . . -30% Current consumption Ambient operating limits Fig. 1 Outside Air Humidity / Temperature Sensor 20mA @ 24V -30. . . 50°C (-22. . . 122°F), 5. . . 95%rh non condensing (below 0°C the humidity measurement is inaccurate) -25. . . +70°C (-13. . . +158°F), 5. . . 95%rh non condensing see Fig. [. . . ] 2 Dimensions of special housing
INSTALLATION
Sensor 1 230Vac 24Vac 2 Transformer for sensors and actuators 7 Common Common 5/6 0. . . 1V/ 0. . . 10V Controller rh Input 24Vac 230Vac
Transformer for controller
Fig. 3 Installation Example
3
EN0C-0795 0497R0-MA
H7508A Room Humidity / Temperature Sensor
Mounting and Installation Advice: · Mount the sensor where it is protected against rain and direct sun radiation, preferably on the north side of the building. If this is not practical, it should be shielded from sun's rays. · Mount the sensor preferably on that outside wall of the buildings having windows of the main occupancy rooms to be controlled. · Provide sufficient air circulation for accurate measurement. · Seal the cable conduit to avoid false measurement due to draught of warm air from the conduit. · Ensure that the cable inlet holes on the sensor housing are sealed properly and that the cable runs from the bottom to the top into the cable entry as shown in Fig. 4 below to prevent that rain water enters the sensor housing. · Do not mount the sensor over windows, doors, air extractors or other heat sources or underneath the eaves of the roofs or a balcony. Offset due to wire resistance per 10m distance from sensor to controller: Type of wire Pt 1000 0. 5mm (AWG20) 2 1. 0mm (AWG17) 2 1. 5mm (AWG15)
2
NOTE CAUTION
Use shielded wiring in areas with high EMI. [. . . ] (0 61 81) 401-1 Fax (0 61 81) 4 54 56
Subject to change without notice. Printed in Germany.
Helping You Control Your World
Manufacturing location is certified according to
EN0C-0795 0497R0-MA
DIN EN ISO 9001 [. . . ]
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