Description
The module allows you to make a delay in the interval from 0,1 seconds before 999 minutes. The countdown is started by applying a high level (3-20 volts) to the middle contact of the terminal block CN1. The control voltage is decoupled from the controller by an optocoupler, which achieves high noise immunity. Pressing the K1 or K2 buttons during the countdown interrupts the process and returns the device to its original state.
Time setting is done with two buttons K1 and K2. Pressing the button and the start of the countdown are confirmed by short (0.1 sec.) buzzer sounds. The end of the countdown is accompanied by a long (0.5 sec.) buzzer sound.
When you press a button K2 the decimal point is alternately lit in the third and second digits.
The dots mean:
- No points - the countdown is made in seconds with discreteness 1 second ( range 1-999 seconds)
- Point in the third digit - the countdown is made in minutes with discreteness 1 minute (range 1-999 minutes)
- Point in the second digit - the countdown is made in seconds with discreteness 0,1 seconds (range 0,1-99,9 seconds)
When you press a button K1 digits start flashing. The flashing digit can be changed by pressing the button K2. All settings are stored in non-volatile memory and are restored the next time the device is turned on..
Oleksandr Plaksin (verified owner) –
Got. They work. disadvantages - the given description is not detailed enough, as a result, the application in the scheme turned out to be a bit difficult, but everything worked out, although additional intermediate relays had to be used. There are no complaints about the timer itself.