Getting Started; Power Supply; Door Unit - Marmitek DOORPHONE 170 User Manual

GETTING STARTED

POWER SUPPLY

DOOR UNIT

The door unit can be
powered in two ways.
1. Using batteries.
(power failure)
2. Using external
power adapter.
1. With the supplied tool, loosen the screws holding the unit from the
mounting bracket. The screws are made specifically for anti-theft
purposes, it is necessary to keep the tool in a safe place for when
you need it later when replacing the batteries. Insert three UM-4 size
AAA alkaline cells into the battery compartment, observing correct
polarity. We strongly recommend using alkaline batteries instead of
rechargeable batteries because at low temperatures (below 0˚C),
rechargeable ones have poor performance and their capacity will fall.
Please note the alkaline batteries are used only as a backup in case
of mains failure. They can only last for 1 - 2 days under normal
operation.
2. The door unit is powered with 12V DC, or 8 to 12V AC, which is
often available at the entrance (bell transformer). Connect the power
supply to the terminals (8) at the back marked
In case of a power failure, the unit will automatically switch to power
from alkaline batteries (if installed).
You can use your existing doorbell transformer as power supply, as
long as it can provide 8...12V, AC or 12V DC. When you want to use
another 12V power supply, make sure it has a stable voltage output
(Switching adapter 100-240VAC (V) 12VDC) and not a transformer
type that has a high no load voltage!
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