Relay Wiring - Alarm.Com ADC-AC-X200 Installation Manual

Addressing
Flip the DIP switches on the the ADC-AC-X200 expansion
module according to the "Jumpers/Switches ON" column in
the Access Control Devices table on the Alarm.com Partner
Portal (or MobileTech). These DIP switches are also displayed
in the "Add Expansion Module" installation wizard. If these
DIP switches are not set according to the Partner Portal
(or MobileTech), the device and its connected readers and
door hardware will not function properly with Alarm.com.
8

Relay Wiring

Two Form-C contact relays are provided for controlling
door lock mechanisms. Each relay has a Common pole (C),
a Normally Open pole (NO), and a Normally Closed pole
(NC). When momentarily delivering power to unlock the
locking hardware (fail secure), the Normally Open and
Common poles are used. When momentarily removing
power to unlock the locking hardware (failsafe), the
Normally Closed and Common poles are used. Check
with local building codes for proper egress door
installation. 18 AWG minimum recommended for
electric locking hardware.
Note: Load switching can cause abnormal contact wear and
premature contact failure. Switching of inductive loads (strike)
also causes EMI (electromagnetic interference), which may
interfere with normal operation of other equipment.
To minimize premature contact failure and to increase
system reliability, a contact protection circuit may be
used. The following circuit is recommended. Locate
the protection circuit as close to the load as possible
(within 12 inches [30 cm]), as the effectiveness of
the circuit will decrease if it is located further away.
Use sufficiently large gauge wires for the load
current to avoid voltage loss.
NC
C
NO
NC
C
NO
DC STRIKE
TO DC POWER SOURCE
+ -
FUSE
DIODE
9