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參數(shù)資料
| 型號(hào)： | DI 300 |
| 廠商： | SIEMENS AG |
| 英文描述： | Phase Switch-off Dimmer(相位轉(zhuǎn)換調(diào)光器) |
| 中文描述： | 相開(kāi)關(guān)過(guò)調(diào)光器（相位轉(zhuǎn)換調(diào)光器） |
| 文件頁(yè)數(shù)： | 4/5頁(yè) |
| 文件大?。?/td> | 466K |
| 代理商： | DI 300 |
interference suppression choke for the
triac, required with conventional phase
cut-on dimmers, is here unnecessary.
To complete the description of the
circuit, only a brief explanation of the
function of the switch is still required.
When pressed, the switch or switches
connected to terminal KL2 connect the
live phase to resistor R1. The voltage
curve corresponds to that at KL1. The
applied voltage pulses are integrated in
C1 and fed via R3 to the processor. The
processor itself clamps the voltage at the
port pin GP2 (pin 5) by means of an
internal diode. The switching or dimming
state is adjusted according to how long
the switch is kept pressed.
Construction
In spite of being fitted with a mixture
of SMDs and wired components, the
phase switch-off dimmer is quick to
construct and involves no difficulties.
Warning
: Because the device has
exposed life-threatening mains voltage
points, its construction, testing and
installation should be undertaken only by
technicians whose training qualifies them
for this role. The applicable health and
safety at work regulations and VDE
provisions must be adhered to.
Following this warning, the SMD
components are the first to be mounted
on the 55 mm diameter one-sided PCB,
on the solder side; refer to the component
mounting diagram, photo of the PCB and
the parts list.
For this purpose, the use of a
soldering iron with a pencil-point tip is
recommended; please take great care to
ensure clean solder-joints.
To mount an SMD component,
proceed as follows: The first step is to
lightly tin the appropriate pad. Then
position the component using a pair of
tweezers, hold it firmly and solder the
first side. Before soldering the second
side, check for correct positioning.
When mounting the SMD
components, the following sequence
should be adhered to: resistors and 0
bridges, capacitors, transistor, diodes,
voltage regulator. When fitting the
semiconductors, it is essential to ensure
their correct positioning, as also for the
subsequent installation of microcontroller
IC2; i.e. the markings printed on the PCB
View of the solder side of the PCB for the DI 300, fitted with all its
components, and the corresponding component mounting diagram
Fig. 6: Circuit diagram
of the phase switch-off
dimmer DI 300
ELVjournal 5/99
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