Electric Strikes Q: I currently have a 7100 series electric strike installed, but is not releasing properly. When the unit is taken out of the jamb and held upside down it seems to function normally. Are 7100 series electric strikes handed or could there be another problem? A: All 7100 series electric strikes are non-handed. If an electric strike functions correctly in one hand and not the other, it is generally a sign that the strike is being underpowered. An example would be an electric strike being rated at 24VDC, but the power being supplied is 24VAC. The strike will probably operate in one hand and not the other simply because gravity is helping the plunger and blocking arm fall to the unlocked position. The first step would be to verify what voltage the strike is rated for. The solenoid data should be labeled on the side of the strike for easy reference. Make sure the rated voltage of the power source is within ±10% of the rated voltage for the solenoid. An incorrect voltage source can and will cause problems with the strike or the entire system. Q: I currently have an MS1850S deadbolt installed on a single aluminum door & frame. The customer is requesting that an electric strike be tied into an access control system. What hardware is needed?A: The first step would be to replace the MS1850S with a 4900 deadlatch of the same backset. The 4900 will fit into the existing preparation for the MS1850S deadbolt without any modification. The 7130 electric strike will be required to cover the strike opening or cutout in the frame. A 4900 paddle or any style of Adams Rite latch handle will be needed for the interior side of the door. The existing mortise cylinder on the exterior of the door can be used on the 4900 deadlatch without any changes. Other components that will be required will include some type of control switch (ex. Pushbutton, keypad, or card reader) and power source (transformer and possibly rectifier) for the strike.