Disable PIN Unlock with Certificates and WPA2 Enterprise

I want to use a Samsung device (4.1.2) within WPA2-Enterprise. When I install a certificate in order to connect to the RADIUS server, the phone immediately wants me to set up a PIN to lock it. I can't disable this setting afterwards, only by removing the certificate. Which locks me out of the wifi. Is there any way to deactivate this behaviour of android and to keep the phone usable without entering a PIN to unlock it?