The KNX I4-ERD evaluation unit monitors ground temperature and humidity. You can control an automatic watering system objectively with the data.
Up to four TH-ERD sensors can be connected to the evaluation unit. The two KNX I4-ERD threshold-value dependent switching outputs for humidity and temperature are available for each sensor channel.
KNX I4-ERD evaluation unit receives external readings via the bus and reconciles these to composite values with proprietary data. In this way, you can work with an overall temperature or an overall humidity reading for each channel.
KNX Evaluation Unit and Ground Temperature/Humidity Sensors. For Watering
N° 70310 KNX I4-ERD Evaluation unit for up to 4 sensors
N° 70312 TH-ERD Sensor for ground temperature and humidity
Evaluation unit KNX I4-ERD:
Housing
Plastic
Colour
White
Assembly
Series installation on mounting rail
Protection category
IP 20
Dimensions
approx. 107 x 88 x 60 (W x H x D, mm), 6 modules
Weight
approx. 300 g
Ambient temperature
Operation -20…+70°C, storage -55…+90°C
Ambient humidity
max. 95% RH, avoid condensation
Operating voltage
230 V AC, 50 Hz