Assa Abloy PTI AP1 User Manual page 6

KEYPAD
AP1
USER MANUAL
| OPENING & CONNECTIONS
Board Connections and LEDs
Connectors
Earth Ground
DC-
DC+
Connect to a DC power source of 12 to 48 volts.
AC input is NOT supported. A Class 2 current limit
supply must be used.
D+ / 'A'
GND / Shield Connection
D- / 'B'
Connect to system controller RS485 connection.
Communications are electrically isolated therefore,
the GND / Shield connection should only be
connected to the GND / Shield connection of other
peripherals or the system controller. Optionally, it
can be connected to a suitable earth ground.
SW1
Common
SW2
Can be used for built in door controls or simply
report their state to the controller. A dry contact
switch connects between SW1 and COM or SW2
and COM. Supervised switches can be used to
detect tampering (wire to switch is cut or shorted).
The LEDs just below the SW1 and SW2 input
contacts indicate the switch state:
Off – Open
On – Closed
Flashing – Tampered
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