protecting water pump by turn on & off in constant time

Hi saleh,

using TIA Portal + Safety Integrated provides failsafe timer elements like TP (impulse), TON(switch-on delaying) and TOF(switch-off delaying). With those timer blocks you can realize your requested timer water pump application. 
So for that you need a Safety logic unit, like a F-PLC and a output module to control your water pump. 

If you have an application with only one safety function, you can for example use a safety relay like 3SK.

Here you can find more informations about it: https://new.siemens.com/global/en/products/automation/industrial-controls/sirius/sirius-monitor/3sk-safety-relays.html 

If you need more functionality, you can use a S1200F/1500F application with corresponding output modules.

If you need more concept ideas, you can find some at the following link:

https://new.siemens.com/global/de/produkte/automatisierung/themenfelder/safety-integrated.html

If you have chosen your products, you verify them with the Safety Evaluation Tool. For that you have to define a safety function (detection --> logic --> reaction)

Best regards

SET Team