13
Pro700
Installation and Programming Manual
A100K10226 v.4.1 Jul. 2006
3 INSTALLATION
3.1 General Information
3.1.1 Stations
z
Up to 40 stations can be connected in one system.
z
A maximum of 16-20 stations is recommended.
3.1.2 Station connection
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Desk-top master station AA711 is connected to wall sockets via
station cords and RJ45 connector.
-
Various types are available
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All other stations are connected with screw terminals inside the
station.
3.1.3 Power supply
The power supply output voltage must be between 12 and 27 VDC.
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All stations are connected to the power unit via the installation
cabling.
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The power current capacity depends on the system size.
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LA617
18VDC/1A units should be used in systems with
max. 5 stations.
-
LA618
18VDC/4A units should be used in systems with
max. 20 stations. The output is adjustable
between 13,5 and 18V
-
LA925
27VDC/5A units should be used in systems with
long cable runs and max. 25 stations.
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Maximum distance on a 0,6 mm
Ø
/24 AWG wire between any
station and a power unit is:
-
12 V
100 meters (300 ft.)
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18 V
300 meters (1000 ft.)
-
24 V
500 meters (1600 ft.)
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A system can be powered with more than one unit to give a
decentralized solution for large installations.
Battery backup
12 or 24 Volt batteries can be used as emergency backup power.
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Adjust the power supply to act as a trickle charger
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12 V battery
LA618 to 13,5 V
-
24 V battery
LA925 to 27,2 V
3.1.4 Installation
cable
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2 pairs 0.5 or 0.6 mm
Ø
(24 AWG) twisted telephone cable should
be used for call and power.
-
One extra pair is required when Program Distribution (music) is
required.
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If the cable has to pass close to radio aerials or other interference
sources, each individual pair in the entire installation cable must be
screened.
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A cable of good quality and low capacitance should be used.
