Wiring - How to wire a Strike – ProdataKey, Inc.

One of the most common types of door control hardware are electric strikes. This article will detail how to correctly wire both Fail-Secure and Fail-Safe Strikes to a PDK Red-series controller.

Fail-Secure Door Strike Wiring Diagram

A Fail-Secure strike is a locking device that remains locked when power is lost.

(A) Diode: The provided diode MUST be installed when using a strike. Install at the strike with the stripe of the diode on positive (+) and the black on negative (-).

Important: The diode MUST be installed as close to the lock as possible. The best scenario (if possible) is directly across the screw terminals on the lock. Another option is to splice the diode in parallel (shown in the image above), connecting it to the positive (+) and negative (-) strike wires using dolphin connectors, and crimp the wires.

(B) NO: Normally Open - Used for strikes in fail-secure configuration. Connect the negative (-) of the strike to NO (Normally Open) on the door controller.

BUS: Use the designated positive (+) or negative (-) board voltage out of (NO) and (NC). If the jumper is off, the relay is a standard “dry contact” needing input into common.

Fail-Safe Door Strike Wiring Diagram

A Fail-Safe strike is a locking device that unlocks when power is lost.

(A) Diode: The provided diode MUST be installed when using a strike. Install at the strike with the stripe of the diode on positive (+) and the black on negative (-).

(B) NC: Normally Closed - Used for strikes in fail-safe configuration. Connect the negative (-) of the strike to NC on the door controller.

BUS: Place a jumper between the central pin and the required positive (+) or negative (-) pin. This will provide voltage out of the Normally Closed (NC) terminal.