23 AIM-1SL & AIM-2SL Hardware Manual
© 2011 Apollo Security Inc.
The most common method of suppression used on DC power strikes is installation of a reverse biased diode
as close a possible to the strike itself. Any type of general purpose diode (1N4001 – 1N4006, etc.) will work.
A suppression diode is included with the internal relays on the AIM-1/2SL. This diode will provide the
maximum effectiveness if the wires between the AIM-1/2SL and the strike are very short. If the wires
between the strike relay in the reader and the electric lock itself are longer than 6 inches, a separate,
external diode should also be installed. It will not hurt anything to use both diodes at the same time. Some
installers install separate, external diodes on all strikes regardless of wire length.
AC powered locks will not allow use of a diode for suppression. There are available suppressors for use with
AC powered locks called Metal Oxide Varistors (MOV’s). These are sometimes included with the lock. If you
wish to use AC powered strikes and a suitable suppressor is not supplied with the lock, you must contact the
manufacturer of the lock for information on obtaining a suitable suppressor. Connection of the suppressor
should follow the instructions provided with the lock. WHEN USING AC POWERED STRIKES THE
INTERNAL DIODE PROVIDED WITH THE AIM-1/2SL READER MUST NOT BE CONNECTED!
3.7.3 Strike Wiring, Internal Relay
The AIM-1/2SL Reader Interface includes internal relays for door strike control. In Paired reader mode, both
reader inputs will control the first strike relay. In Unpaired mode, each will control a separate strike relay.
These relays are capable of switching up to 24 volts at up to 2 amps. If the lock installed on the door requires
more than 2 amps to control, an external relay must be provided. The power that is provided to the locking
device (strike) through this relay may be connected to the same power supply that is providing power the
reader if the strike requires 12 or 24 volts DC. IF THE STRIKE REQUIRES A VOLTAGE OTHER THAN 12
OR 24 VOLTS DC OR ANY AC VOLTAGE, A SEPARATE POWER SUPPLY MUST BE USED.
Use of the internal strike relay allows for simple connection of the door strike without requiring installation of
external ADA-10/11 relay modules. This will result in reduced installation costs at the expense of increased
security. Use of the external, high-security, relay modules (ADA-10/11) will provide increased security on the
strike output.
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