Basic Operation of an electric door strike
Electric Door Strikes are an electrically operated door lock, and this distinguishes them from conventional (non-electric) locks. An electric door strike is not installed in the door, as conventional locks are, but is located in the door jamb. It replaces the strike plate and is compatible with most cylindrical locks. Its operation requires the cylindrical door lock to be in the locked position so that the lock latch protrudes into the strike installed on the door jam. The latch can be secured in the locked position using a key from the inside or by pressing a remote button. When the electric strike is energized, a solenoid releases a plate to block the protruding latch, and this opens the lock to permit entry.
Electric Door Strike - Operating voltages
Generally, there are 2 pairs of voltages for electric door strikes: 12 or 24 VDC (volts direct current) and 12 or 24VAC (volts alternating current). The most common operating voltage in the USA is 12VDC, though a significant number of electric strikes are powered by 12VAC. The major operational distinction between VDC and VAC: Energizing 12/24VDC produces a “click” while 12/24VAC make a buzzing noise while the electric strike is being powered. The 12/24VDC strike plate is released and steady for the duration of powering it while the 12/24VAC vibrates a very high rate.
Most Electric Door Strikes are designed to be compliant with ANSI standards. One of the most common ANSI standard electric strikes has a 4 7/8" L x 1 1/4" W plate.
Inspect the electric strike you intend to install, and check the following:
- The Electric Strike operating voltage is compatible with the power supply and the system that will activate it such as a Video Intercom, Voice Intercom, Access Control Keypad or RFID Access Control system.
- All of the electric strike kit accessories on the list are included.
- The electric strike dimensions are correct for your needs and it is compatible with the door lock and door jamb. The most critical dimensions are circled in figure 1: Plate Height and Width, Strike Depth and Latch Opening MUST be compatible with the door lock latch.
Figure 1 - Dimensions in mm (Divide by 25.4 to convert to inch)
Step 1 (Refer to figure 2)
a) Use the dimensions shown in the enclosed installation diagram to mark the pattern and mounting holes for the electric strike. Cut out the pattern. For wooden door jambs, you must carve out material at the depth and shape required for the electric strike.
Figure 2 - Door Jamb cutout
b) Insert 2 conductor electric wires through the cutout. In most cases 18AWG/2 will be sufficient for typical electric strike consumption range of 0.25A - 0.5A/ 12VDC operation.
Step 2 (Refer to figure 3)
Connect the 2 conductors to the electric strike and insulate the connections. For long-term, stable connection and insulation, it is recommended that wires be soldered and insulated with heat-shrinkable tubes available at most hardware store.
Figure 3 - Wiring the electric strike
Step 3 (Refer to figure 4)
Secure the electric strike to the door jamb using the enclosed screws. For door jambs made out of hollow aluminum, additional hardware maybe necessary to secure the electric strike.
Figure 4 - Securing the electric strike to the door jamb
Step 4 (Refer to figure 5)
Close the door, and confirm that the door lock latch protrudes completely into the electric strike. You should not be able to open the door.
Figure 5 - Door Closure test
Figures 6 and 7 show typical installation of model EVES136NO/NC
Figure 6 - EVES136NO/NC Mounting to a Wood Door jamb
Figure 7 - EVES136NO/NC Mounted to an Aluminum Door jamb