2N Lift8 v1.5.2 - Manual (Page 43)

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2N TELEKOMUNIKACE a.s., www.2n.cz
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ALARM Button Connection
Requirements
The ALARM button design (colour, symbol, keypad surface, mechanical operation)
and location have to meet the requirements of the particular installation.
Button control
Requirements
The ALARM button has to be equipped with a make or break (NO/NC) contact
that is not connected with any other circuit.
None of the ALARM button terminals may be connected electrically with any other
electrical circuit and no voltage source other than the NO/NC contact may be
connected to them.
If one of the ALARM contacts is connected to another circuit, an appropriate
isolation strength according to the applicable standards has to be ensured
between the contacts.
Procedure
Leave the ALARM terminal in the lower position (3).
If you use a make contact, leave the jumper as it is (5th pin on jumper 12) –
ALARM without jumper fitted (factory setting).
If you use a break contact, fit the jumper (5th pin on jumper 12) – ALARM
inverted – jumper fitted.
Voltage control
Requirements
DC 12 to 48V voltage
The voltage signal must be active even during a power failure.
Procedure
Move the ALARM terminal two pins up into position (2).
For activation by voltage connection, leave the jumper as it is (5th pin on jumper
12) – ALARM without jumper fitted (factory setting).
For activation by voltage disconnection, fit the jumper (5th pin on jumper 12) –
ALARM inverted – jumper fitted.
Warning
Connection to different, e.g. higher-voltage, cables leads to damage or
destruction of the Audio Unit.
Maintain polarity while connecting the Audio Unit to avoid Audio Unit
error.
Caution
The Audio Unit is powered via a 2-wire bus. Disconnection of these wires
results in the Audio Unit switch-off.
Avoid the
address duplicity. Audio Unit