SDC-650 Multiple door controller
9
Copyright© 2015
– Saflec Systems (Pty) Ltd.
http://www.saflecsystems.co.za
Important:
When driving inductive loads such as strike locks, care should be taken to prevent a
back-EMF voltage spike. In order to do this a freewheeling diode (also known as flyback diode)
should be connected across the load as seen in the figure below.
Figure 15
Diagram showing freewheeling diode over an internally powered inductive load (eg. strike lock)
– normally open.
