The HK1608 time relay is a fully assembled electronic module without enclosure, designed to control electrical loads using an external -12 V control signal. The timer starts counting after the control signal is removed.
When power is applied, the relay remains OFF and waits for a -12 V signal on the control input. While -12 V is present, the relay switches ON and remains active. Once the control signal is removed, the preset time starts counting. After the time expires, the relay switches OFF and returns to standby mode.
The module offers two operating modes, selectable via jumper W2: in the first mode, the timer runs independently of subsequent control signals; in the second mode, each new -12 V signal during an active cycle resets the timer and the relay remains ON until the signal is removed.
The delay time is adjustable from 1 to 60 seconds or minutes using a trimmer potentiometer. The time unit is selected via a jumper with the power OFF. LED indicators display power and relay status.
The module is intended for integration into an enclosure or control panel.

Technical Specifications:
Operating principle: -12 V controlled time relay, delay after signal removal.
Delay time: 1 - 60 seconds or minutes.
Operating modes (jumper W2):
- W2 closed - timer runs regardless of subsequent -12 V signals,
- W2 open - each -12 V signal resets the timer.
Time unit selection (jumper W1):
- W1 closed - seconds,
- W1 open - minutes.
Time adjustment: trimmer potentiometer.
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 1658 (separate product).