Do you have a question about the SECO-LARM SD-995C-D3Q and is the answer not in the manual?
Strike is only 11/16" deep for use with aluminum frames.
Field selectable for fail-safe or fail-secure operation.
Mounting tabs included for mounting to hollow aluminum & metal doors.
Reversible non-handed design fits either right-hand or left-hand doors.
For indoor use only.
Rotate field-selectable plug so that '1' is facing up for fail-safe operation.
Rotate field-selectable plug so that '2' is facing up (Default).
Measure latch line and center line on door jamb for alignment.
Align the included mounting template to the latch and center lines.
Mount the strike to the mounting tabs using machine screws.
Connect to power according to the wiring diagram.
Check wiring, voltage, amperage, and activation device for proper operation.
Check door latch operation and adjust strike position if necessary.
Ensure the strike is connected to a DC power supply.