How to convert controlled pwm voltage block from electrical port to physical port using Matlab 2014a?

I want to convert controlled PWM voltage block in simulink model from electrical port to physical port. I am using Matlab 2014a

i know that i should right click on the block and choose Simscape >> Block choices >> physical port

but when i did these steps i don't find Simscape option .... So, i need another solution for this problem

Thanks

Answer 1

[Sabin]

The option to have PS input (as opposed to electrical connections) was introduced in R2017b.