KEYPAD
AP1
USER MANUAL
| POWER
LEDs
Power Supplies
The red and green LEDs indicate the status of the
internal 5V and 12V power supplies. Failure of
these LEDs to light when power is supplied to the
AP1 would indicate a fault or failure condition.
Red LED5 indicates the status or the isolated RS485
power supply. Failure of this LED to light when
power is supplied to the AP1 would indicate a fault
or failure condition.
RS485 Communication
The LEDs above the RX and TX silkscreen indicate
the status of the RS485 network. The RX led will
light when the network is being driven by the
system controller. The TX light will light when the
AP1 is driving the network.
The RX light will be flashing when the AP1 is
powered and properly connected to the system
controller.
The TX light will flash when the AP1 is responding
to a message successfully received from the system
controller. A flashing TX light will typically indicate
communication between the system controller and
AP1 has been established.
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