80
The door release contact
(DR contact) at the bus line rectifier
switches every time the door release
button is pressed. Switching time
fixed at 3 secs.
Benefits
• Tamper-proof, no access from the
outside.
• Only 4 cores to the door station.
Drawbacks
• The door release must be routed
to the distributor.
• Installation only possible with 1
door station in the line.
• With several door stations, this
installation is not possible.
Application
Externally positioned door stations.
The DR contact in the bus video line
rectifier and the DR contact in the
door loudspeaker are used. Both
contacts switch every time the door
release button is pressed. Switching
time fixed at 3 seconds
Benefits
• Tamper-proof, as no access from
the outside.
• Tamper-proof door release even
with several door stations in a
system.
• Installation principle possible even
with several door stations.
Drawbacks
• The door release must be routed
to the distributor and to the door
loudspeaker.
• 5 cores required to the door
station.
Application
Externally positioned door stations.
8 Supplementary functions
Door release actuation
In deviation from the standard plans,
the door release can be actuated in
various ways. The bus video line
rectifier BVNG 650-0 has a DR
contact which is closed every time
the door release button is actuated.
At the door loudspeakers
BTLM 650-... and BTLE 050-... there
is also a door release contact which
is only closed when the bell has
previously been rung at the relevant
door loudspeaker. If several door
loudspeakers are operated within a
system, both contacts are required
to open the door station. In general,
high-resistance door releases must
be used in order to guarantee the
greatest possible degree of
operating reliability/the greatest
possible range. Use a Siedle door
release or a 12 V AC door release
with an impedance of at least
20 Ohm.
Summary of Contents for BFS 850-0
Page 1: ...System Manual In Home bus Video Issue 2007 ...
Page 8: ...8 3 Configuration conductor lengths Multiple line system Line 1 Line 2 Line 15 ...
Page 26: ...26 5 Installation AS TVHa 1 1 Siedle Vario ...
Page 30: ...30 5 Installation AS TVHa 1 1 Siedle custom fit door loudspeaker ...
Page 32: ...32 5 Installation AS TVHa 1 1 Siedle Classic ...
Page 34: ...34 5 Installation AS TVHa 1 1 Siedle Steel ...
Page 36: ...36 5 Installation AS TVHa 1 2 Siedle Vario ...
Page 38: ...38 5 Installation AS TVHa 2 1 multiple line system ...
Page 40: ...40 5 Installation AS TVHa 1 1 call via display call module DRM 611 0 ...
Page 42: ...42 5 Installation AS TVHa 1 1 DoorCom Analog DCA 650 ...
Page 44: ...44 5 Installation AS TVHa 1 1 additional external camera ...
Page 46: ...46 6 Installation AS TVHa 1 1 Audio Video ...
Page 48: ...48 6 Installation AS TVHa 1 2 Audio Video ...
Page 50: ...50 6 Installation AS TVHa 2 1 Audio Video ...
Page 78: ...78 8 Supplementary functions AS TVHa 1 1 with switching control functions ...