TWS
Series
Instructions
39
ø25
Installation of LED Illuminated Units
1. Note the polarity for wiring when connecting to DC-DC
converter unit.
2. Transformer type units are recommended for use in areas
subjected to noise.
3. Notes for Pure White LED Lamps
•
Do not use the pure white LED outdoors, otherwise it will
lead to the degradation of brightness and color. Do not
remove or apply shock to the cap on the pure white LED
lamp, otherwise it may break or damage the cap.
•
For the pure white LED, use a white lens. The illumination
color will be dull if a different color is used.
Terminal No. Polarity
X1 Positive
X2 Negative
Notes on LED Illuminated Units
LED lamps consist of semiconductors. If the applied voltage
exceeds the rated voltage, LED elements may deteriorate
due to overheat, resulting in significant decrease in lumi-
nance, hue change, or failure of lighting. Also, if an extrane-
ous noise, transient voltage, or transient current is applied to
the circuit, similar effects may occur. When using LED
lamps, observe the following instructions.
•
Rated Voltage
The LED lamps are rated at 6V, 12V, or 24V AC/DC, and can
be used within ±10% the rated voltage of either AC or DC.
•
DC Power
1. Switching power supply
Regulated voltage from switching power supply is best
suited. Make sure to use within the rated voltage of the
LED lamp.
2. Rechargeable battery
Note that the battery voltage may exceed the rated volt-
age of the LED lamp while the battery is being charged
and immediately after the charging is complete. Be sure
to use the LED lamp on a voltage of ±10% the rated volt-
age.
3. Full-wave rectification
Since the LED lamp is AC/DC compatible, a diode bridge
for rectification is not necessary. If the LED lamp is used
on a full-wave rectification current through a diode bridge,
the rectifier diodes will reduce the voltage, resulting in
lower luminance.
4. Single-phase half-wave rectification
This is not suitable for the power source of LED lamps.
Use constant-voltage DC power.
•
Noise
LED elements deteriorate due to extraneous noise, resulting
in significant decrease in luminance, hue change, or failure
of lighting. When such effects are anticipated, take a protec-
tion measure shown below, such as RC elements or a surge
absorber.
[Protection Example 1] For AC circuit
[Protection Example 2] For DC circuit
•
Countermeasures against Dim Lighting
1. Leakage currents through the transistors or a contact
protection circuit may cause the LED lamp to illuminate
dimly even when the output is off.
2. When the LED lamp is illuminated by a transistor output,
take the following measure.
[Circuit Example]
Connect shunt resistor R in parallel with the LED lamp.
LED with
transformer LED R
C
LED
Ry
Relay
coil or
solenoid R
C
LED with
transformer
(Reference values) R:120Ω
C: 0.1 µF