This timer is a cyclic timer with a fixed total ON + OFF period of 1 minute, 30 minutes or 1 hour. Three on-board jumpers can be used to limit the total ON+OFF period to 1 minute, 30 minutes or 1 hour. You can then set the ON period of the cycle using the variable resistor. For example, if you set the variable resistor to 1/3 of its range, the ON period will be about 20 minutes and the OFF period will be about 40 minutes (assuming the jumper is set to the 1-hour mode).

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Supply voltage: 9 to 12V DC or 18V AC C.T. (2 x 9V AC) Transformer / 100mA Time adjustable from 15 seconds to 60 minutes Output Relay: Maximum 3A at 110V AC or 24V DC Maximum 1.5A at 220V AC PC board dimensions: 3.05" x 1.80"