The differential switch RJ402 is used to switch a circulation pump at a set difference of temperature between CT1 and CT2. The value of the temperature difference for switching is adjustable in the range of 2°C to 50°C. With the Hys adjustment wheel, the switching time can be changed from 2 °C to 35 °C. Application: automatic recharging of the hot water tank or automatic switching on of the circulation pump in a solar system Mounting on DIN rail Output - switching relay, switching current max. 5A/AC1
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