Catalog ET B1 • 2009/2010 EN

© Siemens AG 2008
BETA Switching
Timers
7LF6, 5TT1 3 timers for buildings
■ Overview
■ Benefits
Stairwell lighting is part of the standard equipment of a building.
This is required in DIN 18015-2 "Electrical systems in residential
buildings; minimum type and scope of equipment".
Stairwell lighting timers can be distinguished by the level of
convenience offered with regard to the range of functions. The
required time can be precisely set using the push-to-lock knurling
wheel setting. With modern four-wire installations, stairwell lighting
timers can always just be pressed again. A maintained light
switch prevents the need for repeated pressing, for example
during relocations.
• Reliable durable switching of incandescent lamps using patented
contact design
• Ultra-quiet stairwell lighting timers – ideal for residential areas
• Energy savings through disconnection of unnecessary
equipment
• Warning prior to switch off acc. to DIN 18015-2 for stairwell
lighting in apartment houses.
■ Technical specifications
7LF6 110 7LF6 111 7LF6 113 5TT1 303 7LF6 114 7LF6 115 7LF6 112
IEC 60669, EN 60669
Standards
Supply
• Rated control supply voltage Uc
- Operating range
V AC
× Uc
230
0.9 ... 1.1
• Rated power dissipation Pv
VA
Approx. 5
Setting ranges
min
0.5 ... 10
• Accuracy
s
±30
Manual switches
9
At 50/60 Hz
Automatic/permanent
Voltage endurance
0.5 ... 10 3 ... 60
At pushbutton input
(pushbutton malfunction)
--
700
10
16
0.3
>3
30
Yes
A
700
V AC
A
250
16
• Contact gap
mm
>3
• Minimum contact load
V; mA
10; 300
Max. incandescent lamp load
W
2000
--
2000
Unit(s)
Unit(s)
Unit(s)
Unit(s)
20
2 × 20
10
2×5
--6
3
20
2 × 20
10
2×5
Glow lamp load
mA
50
10
50
Max. fan load
VA
--
Short-circuit strength
0.5 ... 10
Yes
ms
Minimum push duration
1 ... 10
Channels/contacts
• Switching channels
- Rated operational voltage Ue
- Rated operational current Ie
Fluorescent lamp load 58 W
- Uncorrected
- DUO circuit
- Siemens ECG
At p.f. = 1
1 lamp
2 lamps
--
Terminals
• Terminals ± screw (Pozidriv)
PZ 1
• Conductor cross-sections of main current paths
- Rigid
- Flexible, with end sleeve
Min.
mm2
mm2
1.5 ... 6
1
°C
-10 ... +50
Environmental conditions
• Permissible ambient temperature
• Resistance to climate
Acc. to EN 60068-1
20/045/04
• Degree of protection
Acc. to EN 60529
IP20, with connected conductors
9/16
Siemens ET B1 · 10/2008
--
-200
© Siemens AG 2008
BETA Switching
Timers
7LF6, 5TT1 3 timers for buildings
■ Selection and ordering data
Ue
Ie
Uc
V AC
A AC
V AC
MW DT
Order No.
Price
per PU
PG
PU
PS*/
P. unit
Weight
per PU
approx.
Unit(s) Unit(s) kg
Stairwell lighting timers
With switch for continuous light and push-to-lock
knurling wheel setting,
setting range 0.5 ... 10 minutes
For 3-wire circuit, L-momentary contact,
not resettable
250
16
230
1
}
7LF6 110
027
1
1
0.085
A
7LF6 111
027
1
1
0.085
}
7LF6 113
027
1
1
0.085
For 4-wire circuit, L-momentary contact,
resettable, or 3-wire circuit, N-momentary contact,
resettable
250
16
230
With warning by flashing prior to switch-off,
for 4-wire circuit, L-momentary contact,
resettable, or 3-wire circuit, N-momentary contact,
resettable
250
16
230
Lighting timers
With switch for continuous light and push-to-lock
knurling wheel setting,
with warning by flashing prior to switch-off,
setting range 0.5 ... 10 minutes,
4-fold extension of runtime by pressing the
pushbutton for 1 second,
for 4-wire circuit, L-momentary contact,
or 3-wire circuit, N-momentary contact
250
16
230
9
1
B
7LF6 114
027
1
1
0.085
1
A
7LF6 115
027
1
1
0.085
1
B
7LF6 112
027
1
1
0.085
B
5TT1 303
027
1
1
0.130
Energy-saving timers
With switch for continuous light and push-to-lock
knurling wheel setting,
with warning by flashing prior to switch-off,
setting range 3 ... 60 minutes,
switch off by pressing pushbutton second time as
with remote control switch,
for 4-wire circuit, L-momentary contact, resettable,
or 3-wire circuit, N-momentary contact, resettable
250
16
230
Timers for fans up to 200 VA
With switch for continuous light and push-to-lock
knurling wheel setting,
setting range 0.5 ... 10 minutes,
for delayed switch-on of fan
250
16
230
ECG control switches for ECG dynamic
With transparent cap, with switch for continuous light
and position indication, setting range 1 ... 10 minutes,
with warning through dimming prior to switch-off,
direct current output 1 ... 10 V for control of 20 ECG
dynamic mounting depth 55 mm
250
10
230
2
■ Dimensional drawings
A1 13 14 T
B2
L
2
1 8
1
L
2
1 8
A2
7
I2_10911
24
+ --
36
I2_06708c
N
N
I2 _ 1 0 9 1 0
45
67
90
45
90
B1
5
43
64
44
64
7LF6 110
7LF6 111
7LF6 112
7LF6 113
7LF6 114
7LF6 115
5TT1 303
* You can order this quantity or a multiple thereof.
Siemens ET B1 · 10/2008
9/17
© Siemens AG 2008
BETA Switching
Timers
7LF6, 5TT1 3 timers for buildings
■ Schematics
Switching example: 7LF6 111 timer in 4-wire circuit,
L-momentary contact, resettable
Switching example: 7LF6 115 energy-saving timer with
advance warning
Typical circuit for new installation with separate cable routing for
pushbuttons and lights. The additional DI switch allows external
switching to continuous light. A time switch can also be used.
An additional attic circuit is also available, which operates
independently of the timer, but on the same electrical circuit.
The timer can be restarted before the set time expires.
The timer is connected in the same way as the 7LF6 111 timer in
a 4-wire circuit or 3-wire circuit. The energy-saving timer
switches on if pressed once and switches off when it is pressed
again. If it is not switched off manually, it is automatically
switched off after the set time, or max. 60 minutes. 20 and
40 seconds before expiry, the light flashes briefly twice (50 ms)
to warn of the impending switch-off. This allows time to reset the
switch while the light is still on. Prior to the warning time, a push
of the button ends the timing interval.
N
L2
L N
DE
I2_10916a
te
ca.
40s
ca.
20s
ca.
40s
te>t >te-40s
I2_10919b
230 V AC
L
ca.
20s
te -40s>t
te
L2
e
e
1
e
2
Switching example: 7LF6 110 timer in 3-wire circuit,
L-momentary contact, resettable
Circuit for new installation with shared cable routing for pushbuttons
and lights. The timer can only be restarted after the set time
expires.
I2_10912a
9
te = runtime
te = runtime
Switching example: 7LF6 111 timer in 3-wire circuit,
N-momentary contact, resettable
L
Can only be used with a limited number of wires. The timer can
be restarted before the set time expires. While this 3-wire circuit
with N-momentary contact is technically possible, it does not
comply with DIN VDE 0100-460. However, it is used in old
systems for replacement purposes.
L
230 V AC
230 V AC
2
N
I2_10920
L2
N
L
L N
N
te
I2_10915a
I2_10917a
te = runtime
L2
e
e
1
e
2
Switching example: 7LF6 113 timer with advance warning
The timer is connected in the same way as the 7LF6 111 timer in
a 4-wire circuit or 3-wire circuit. 20 and 40 seconds before expiry,
the light flashes briefly twice (50 ms) to warn of the impending
switch-off. This allows time to reset the switch while the light is
still on.
I2_10913a
te = runtime
I2_10921a
Switching example: 7LF6 112 timer for fans up to 200 VA
The switch switches the light on immediately, e.g. in a toilet. After
a delay of approx. 1 minute, the fan is switched on. When the
light is switched off, the fan continues to run for the time set at
the timer.
L N
I2_10918
I2_10914a
te = runtime
9/18
Siemens ET B1 · 10/2008
1 Min
v
L2
1
ca.
40s
te
te = runtime
L 230 V AC N
2
L2
1 Min
te
ca. 20s
© Siemens AG 2008
BETA Switching
Timers
7LF6, 5TT1 3 timers for buildings
Switching example: 7LF6 114 lighting timer
with advance warning
Switching example: 5TT1 303 ECG control switch
t<1s
t>1s
L2
te
ca.
40s
ca.
20s
ca.
40s
te>t
ca.
20s
te >t
4 x te
ca.
40s
L1 230 V AC
N
L
N
+
13 A2 A1
L
N
+
L
N
+
-
14 T
+
-
B1 B2
ca.
20s
te = runtime
I2_07450a
t <1s
I2_10922b
The timer is connected in the same way as the 7LF6 111 timer in
a 4-wire circuit or 3-wire circuit. When pressed, the lighting timer
switches on for the set runtime, up to 10 minutes. If the switch is
pressed for more than one second, the light is switched on for
four times the set time, i.e. up to 40 minutes. The last press of the
pushbutton is decisive. 20 and 40 seconds before expiry, the
light flashes briefly twice (50 ms) to warn of the impending
switch-off. This allows time to reset the switch while the light is
still on. The timing interval restarts each time the button is
pressed.
B1 B2
The device is fitted with a direct voltage input for the control of
an 5LZ. ...-4 ECG Dynamic. When the pushbutton is actuated,
the power supply is released and the ECG dynamic is brightened,
depending on the setting of the timer, for up to 10 minutes.
On expiry of this time, the ECG dynamic is dimmed according to
the set dimmer level, if pressed again it brightens again. If the
switch is not pressed for 30 minutes, the lighting switches off
completely. In addition to these functions, the dimming time and
brightness period can also be controlled using a separate
pushbutton or time switch over control inputs B1 and B2.
Switching the ECG dynamic and the fluorescent lamp as little as
possible extends the service life.
I2_07691a
t3
t1
13
t1
t3
t1
t3
t2
t2
t1
14
t2
t2
B1
B2
t 1 : Bright phase
t 2 : Operating period
t 3 : Dim phase
Corridor lighting in homes for the elderly
Corridor lighting in hospitals
At mealtimes, from 5 to 7 p.m., the light in the corridors can be
permanently switched on using a time switch (contact B1).
Between 7 and 10 p.m., the lighting is dimmed using switch B2.
Simply press the corridor pushbutton again to return the lighting
to the brighter setting at any time. After 10 p.m., the light is
switched off. It can be switched back on at any time by pressing
the corridor pushbutton.
During the day – during peak periods, lunch times, visiting times,
shift changes, doctor's rounds – the light is switched on. During
quiet periods, i.e. afternoons and nights, the light is switched to
a dimmed state. A patient can switch the light back to the bright
setting at any time by pressing the corridor pushbutton. In
emergencies, the nurse can switch the light to "emergency
operation", i.e. permanently bright, using switch B1 (no time limit
of brightness period).
Siemens ET B1 · 10/2008
9/19
9
© Siemens AG 2008
BETA Switching
Timers
7LF6, 5TT1 3 timers for buildings
■ More information
Stairwell lighting
Manual switches
This is required in DIN 18015-2 "Electrical systems in residential
buildings; minimum type and scope of the equipment". What is
less known is that 100 lux is required according to EN 12464-1
"Lighting of workplaces" for traffic areas and corridors, section
5.3. This means that approx. 60 W incandescent lamps, 25 W
energy-saving lamps or 25 W fluorescent lamps need to be
used. It is hard to see why lesser requirements should apply to
stairwells in residential buildings than stipulated in EN 12464-1.
All timers have a manual switch for the function Automatic/ON.
This allows the operator to switch to continuous light in the event
of moving house or emergencies.
4-wire circuit, L-momentary contact
4 conductors are installed within the building. The timing interval
is started by pressing phase L. During the runtime, the timer can
be reset at all times.
3-wire circuit, L-momentary contact
3 conductors are installed within the building. The timing interval
is started by pressing phase L. No resetting is possible during
the runtime as the pushbutton input and output are exposed to
the same potential during this period. The glow lamps are
switched off during the runtime.
3-wire circuit, N-momentary contact
9
3 conductors are installed within the building. The timing interval
is started by pressing the N-conductor. During the runtime, the
timer can be reset at all times. However, this switching no longer
corresponds to DIN VDE 0100 and is now only used in old
installations.
Safety through warning prior to switch-off
DIN 18015-2 "Electrical systems in residential buildings: type
and scope of minimum equipment" stipulates that the automatic
lighting-off control in stairwells of multifunctional dwellings must
be equipped with a warning function to prevent sudden darkness
in the building. This contribution towards safety is offered by
4 device versions. The 7LF6 113 stairwell lighting timer, the
7LF6 114 lighting timer and the 7LF6 115 energy-saving timer
warn of an impending off by flashing, the 5TT1 303 stairwell lighting
timer ECG warns of the impending switch-off by dimming, allowing
sufficient time for the light switch to be pressed again.
9/20
Siemens ET B1 · 10/2008
Useful continuous contact
Pushbuttons should never jam. For this reason, all our timers
have a safeguard to prevent this type of malfunction. Even
better, this feature can be used (e.g. by caretakers of properties)
to switch to a continuous light in the event of moving house or
emergencies.
Setting accuracy
The electronic remote control switches offer a high degree of
accuracy. The runtime can be set precisely to + 30 seconds
using the push-to-lock knurling wheel setting. The factory
settings ensure that the limit values of 1 and 10 or 60 minutes
can be reliably set.
Short-circuit strength
Stairwell lighting timers are primarily used for the switching of
incandescent lamps, which may occasionally be subject to short
circuits.
A key feature of all devices is their high short-circuit strength
without the contacts welding.
Switching of fluorescent lamps
In order to extend their service life as far as possible, fluorescent
lamps should only be switched using a stairwell lighting timer if
the switching frequency is not excessive. Using electronic
ballast (ECG) to operate them is more gentle on the device and
saves energy. The 5TT1 303 stairwell lighting timer ECG switches
the electronic ballast and warns of the impending switch-off by
dimming.
Switching of energy-saving lamps
The switching of energy-saving lamps has provoked heated
discussions. Energy-saving lamps require a certain time before
they produce their full light output. The characteristic of the
electronics is not ideal for flashing operation. They do not dim.
It is difficult to find suppliers of energy-saving lamps that are
suitable for stairwell lighting timers and comply with the required
specifications.