The HK1612 reset time relay is a fully assembled electronic module without enclosure, designed for cyclic control of electrical loads with long OFF periods and short ON intervals. The device operates as a timer that periodically switches the load ON for a fixed reset time.
When power is applied, the preset OFF time starts counting. After the OFF time expires, the relay switches ON for a fixed period of 1 or 5 minutes, selectable via jumper W2. Once the ON time expires, the relay switches OFF and the cycle repeats continuously until power is removed.
The OFF time is adjustable from 1 to 24 hours using a trimmer potentiometer. For easier setup, jumper W1 allows initial adjustment in seconds before switching to hours. All jumper settings must be changed with power OFF.
LED indicators show power status and relay activity. The module is intended for integration into custom enclosures or projects.

Technical Specifications:
Operating principle: cyclic reset time relay with periodic ON interval.
OFF time: 1 - 24 hours.
ON (reset) time:
- 1 minute - jumper W2 closed,
- 5 minutes - jumper W2 open.
Time adjustment: trimmer potentiometer.
Time scale selection (jumper W1):
- W1 closed - seconds (setup mode),
- W1 open - hours.
Indication:
- power LED,
- relay ON LED.
Dimensions:
- PCB: 49 x 29 mm.
Relay output:
- Normally Open contact (NO),
- Common contact (COM),
- Normally Closed contact (NC).
Relay ratings:
- 15 A / 125 V DC,
- 15 A / 24 V DC or AC,
- 10 A / 250 V AC.
Supply voltage: 10 - 14 V DC.
Current consumption:
- relay OFF: 8 mA,
- relay ON: 48 mA.

This product is a fully assembled module.
It is also available as a boxed finished product - Product code 1662 (separate product).