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GAMMA instabus
N 528/31 Universal dimmer 300 VA,
Main module
5WG1 528-1AB31
Operating and Mounting Instructions
As at: September 2011
Bild / Figure 1
Bild / Figure 2
A5E01278619E
DS 06
Product and Applications Description
The universal dimmer main module N 528/31 is an installation
device for DIN-rail mounting, in N-system dimensions. It is de-
signed for lighting control, i.e. for switching and dimming resis-
tive, inductive or capacitive loads from 20 to 300 VA at 230V
AC, 50-60 Hz. The bus is connected via a bus terminal and the
power supply for the electronics is provided by an integrated
230V AC power supply unit.
Connecting universal dimmer submodules
You can connect a universal dimmer submodule N 528/41 (dim-
mable load 20-300 VA), a universal dimmer submodule
N 527/41 (dimmable load 20-500 VA) or a universal dimmer
submodule N 527/51 (dimmable load 20-1000 VA) via a twisted
pair of wires with the 2-pin interface T+, T- (see, for example,
devices B and E in figure 1). Up to 5 universal dimmer submod-
ules can be connected to a universal dimmer main module, in
which the twisted pair T+, T- is also to be looped from interface
to interface. In this way, a main module can be extended if re-
quired from a KNX dimmer with one output to a KNX dimmer
with up to 6 outputs.
When connecting a new universal dimmer submodule to a main
module please keep in mind to connect first their 2-pin inter-
faces before applying the mains voltage to the submodule(s).
Through this a safe data transmission from the main module to
the submodule(s) will be safeguarded.
V
DANGER
• The lines T+ and T- are to be installed safely isolated from the
230V potential. The maximum permitted line length be-
tween the main module and the submodule furthest away is
2 m.
Device address
You set to which dimming channel (B...F) of the main module
the relevant submodule is to be assigned with a rotary switch
on the underside of the housing (see A1 in figure 2). A universal
dimmer main module must always be set on channel A. If two
or more devices are set incorrectly to the same address, then
the light emitting diodes (LED) for the relevant channels will
flash.
Dimming loads from 40 to 2000 VA
The outputs from two N 527/51 universal dimmer submodules
(dimmable load each 20-1000 VA) can be connected in parallel,
in order to be able to dim a load in the range from 40-2000 VA
(see devices E and F in figure 1).
V
DANGER
• You must not connect the outputs of more than two
N 527/51 devices in parallel. Parallel operation of the out-
puts from universal dimmer main modules with each other
or with a submodule, as well as of all other universal dimmer
sub-modules, is not permitted!
LED indications
6 bi-color (red/green illuminating) light emitting diodes (LED)
on the top of the main module (see figure 3, B8) indicate the
status of all outputs (LED illuminates green if the output is
switched off and illuminates red if the output is switched on). If
any of the LED A...F flashes (red or green), then an error has
been detected on this module. This is the case, for example, if
more modules are configured than are actually connected, the
configured module type is incompatible with the module type
actually connected, the same device address has been set more
than once or if a module was detected as defective.
Switching between bus mode and direct mode
With the "Direct mode" pushbutton (see figure 3, B6) you can
switch between "Bus mode" and "Direct mode". If this pushbut-
ton is held down for at least 3 seconds, then the yellow LED
(see figure 3, B7) comes on permanently to indicate "Direct
mode".
In direct mode, a module (output) can be selected and can be
switched and dimmed using the 2 pushbuttons (see figure 3,
B5) on the top of the main module. A module is selected if the
"Direct mode" pushbutton (see figure 3, B6) is tapped several
A1
times until the LED for the wanted module A...F will flash (red
or green, depending on the current switching state). Modules at
which an error is indicated in bus mode by a flashing LED A...F
cannot be switched or dimmed in direct mode. After switching
on the direct mode a flashing LED will go out.
You use a parameter to set whether direct mode can be
switched on permanently or for a limited time. At the factory,
direct mode is set to a timed switch-on time of 15 minutes.
Each time the pushbutton is operated in direct mode, the timer
for switch-on time limiting is restarted. After the switch-on time
has elapsed without a further press of the pushbutton, direct
mode switches off independently and thus "Bus mode" is re-
enabled (if communication over the bus is possible). Alterna-
tively, direct mode can be ended at any time by pressing the
"Direct mode" pushbutton again for at least 3 seconds. The yel-
low LED for indicating direct mode then goes out and the actua-
tor is again in bus mode. In bus mode, pressing the pushbutton
to switch an output on or off directly has no effect. If direct
mode is enabled, switching, dimming value and scene recall
commands received via the bus are stored in a buffer and will
be executed automatically after a return to bus mode.
Pushbutton inputs E1, E2
A conventional pushbutton can be connected each to the E1
and E2 inputs of the main module for direct switching and
dimming of the output A. Tapping the pushbutton on the E1 in-
put leads to switching on, holding it down to dimming brighter,
tapping the pushbutton on the E2 input leads to switching off,
holding it down to dimming darker.
Page 1 of 2
GB
Product and Applications Description, continued
You use a parameter to set whether pressing one of the buttons
is also to lead to sending switching and dimming telegrams via
the bus to other actuators
V
• On electrical safety reasons, both pushbuttons must be con-
Application program
The extensive application program of the N 528/31, which is
configured and loaded with the Engineering Tool Software
(ETS) from ETS 3.0 release f onwards, controls both the output
from the main module and the outputs from all connected
submodules. Inter alia, it includes monitoring of each output for
short circuit, overload and temperature rise, status objects for
reporting switching and dimming status, a warning prior to
switching off, time functions, blocking and releasing an output,
a configurable behavior at bus voltage failure and recovery, as
well as on mains voltage recovery and an integrated 8-bit scene
control in which each output can be integrated in up to 8
scenes.
Behaviour at voltage failure / recovery
Because the power for the main module's electronics is gener-
ated via an integrated 230 V AC power supply unit, a mains volt-
age failure means that the affected module also fails. In the
event of a mains voltage failure at the main module, night
mode is ended if it is active and the current switching states and
dimming values of all modules (channels) are stored perma-
nently, in order that they can be regenerated automatically af-
ter mains voltage recovery. You use a parameter to configure
the behaviour after mains voltage recovery: switching on all
channels, switching off all channels, restoring the switching /
dimming states of all channels at mains voltage failure. How-
ever, if night mode was active before mains voltage failure, this
will not be re-enabled.
A mains voltage failure exclusively at a submodule results as
well in switching off this channel as in the complete failure of
this module. The submodule will remain switched off after
mains voltage recovery if the main module didn´t receive any
switching or dimming commands for this module during mains
voltage failure at it. Otherwise the main module will transmit
the last meanwhile received switching / dimming command to
the submodule after mains voltage recovery at this module.
In contrast, a bus voltage failure results only in a communica-
tion failure via the KNX bus. But communication between the
main module and all connected sub-modules via the interface
T+ / T- is unaffected by this. Each module retains its current
status. If pushbuttons for direct switching and dimming are
connected to a module's pushbutton inputs E1, E2, you can use
these connected buttons to switch and dim this module. You
can also select each module (i.e. each channel) with the
pushbuttons on the top of the universal dimmer main module
and switch and dim in direct mode. Parameters are used to set
the behaviour in each case on bus voltage failure and on bus
voltage recovery.
Additional Information
http://www.siemens.com/gamma
Example of Operation
See figure 1
Technical Specifications
Bus voltage supply
• provided via the bus line
• Bus current: typically 7 mA, max. 10 mA.
Power supply
• Rated voltage: 230V AC +10%/-15%, 50-60 Hz
• Rated current: 1.3A
• Power loss if output A = OFF: 1.3 W,
maximum power loss at trailing edge dimming: 2.0 W,
maximum power loss at leading edge dimming: 4.6 W.
Pushbutton inputs
• Rated voltage: 230V AC, 50-60 Hz
• Maximum length of the connecting cable: 100 m
Load output
• Rated voltage: 230V AC, 50-60 Hz
• Rated current: 1.3A
• Connection output at 45°C ambient temperature:
- Low voltage halogen lamps with electronic transformers:
- Low voltage halogen lamps with magnetic transformers:
Additional Information see :
http://www.siemens.com/gamma-td
GB
DANGER
nected to the same phase conductor as the dimmer module
in question.
- Incandescent lamps: 20...300 W
- High voltage halogen lamps: 20...300 W
40...300 VA
20...300 VA
- Osram dimmable energy-saving lamps:
1...3 units 15 VA resp. 20 VA
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