14/08/2026
Do you know what back EMF is and why it matters in access control? π€
Many electric locks use a coil to operate the locking mechanism.
When the power is switched off, the energy stored in that coil is released as a sudden voltage spike, known as back electromotive force (back EMF). β‘
Over time, these spikes can damage the equipment responsible for energising and de-energising the lock.
Thatβs why every lock manufactured by CDVI is supplied with built-in back-EMF protection. π‘
A pre-fitted varistor helps suppress the voltage spike, protecting the equipment and supporting dependable, long-term performance.