Flamenco Technical Manual Revision 6.0 - Tunstall.de

8. Laying the cables
8.6 Room bus RAN
The RAN (room area network) links all components in a room. For data transfer,
3 conductors of IY(ST)Y 2x2x0.8 (Cable = In) are required.
+24V
RAN
0V
R(ed) = +24 V
Y(ellow) = RAN
B(lack) = 0V
Max. permissible cable length for RAN is 50 m.
Max. permissible number of RAN users is 30.
Devices for speech communication require an additional speech line (cable Is).
All devices with RAN interface can be connected at random (star, bus or mesh
network). Later expansion of the RAN can be realised from any device and independent
of the device's particular function. Only additional devices with speech
communication require an extra speech line.
For a better overview, split the various RAN connections into function groups.
This type of arrangement is more service-friendly (Fig. 5 on page 60).
The type of installation has no influence on the RAN functions.
The voltage drop at each cable connection caused by a current of max. 60 mA
must not exceed 0.3 V in relation to the voltage at the ComTerminal. Under normal
condition, this value is achieved when a RAN user is connected to a cable
of type In, which is longer than 50 m.
8.6.1 Shielded cables for the room bus RAN (Is)
CAUTION ! Insulate the protective screen or the blank shield wire up to the
connecting point. Otherwise, a short circuit situation or crosstalk may occur.
To ensure the protective screen function, all room bus cables for music or
speech transmissions (shielded cables) may be stripped for a max. length of
30 mm only.
max. 30 mm
Flamenco - Technical Manual, 04/13 (Rev. 6.0), 00 8812 60
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