Datasheet

YW Series Control Units
31
ø22
LED Illumination
LED lamps consist of semiconductors. If the applied voltage
exceeds the rated voltage, LED elements deteriorate due to over-
heat, resulting in significant decrease in brightness, hue change, or
failure of lighting. Also, if extraneous noise, transient voltage, or
transient current is applied to the circuit, similar effects will be
caused. When using LED lamps, observe the following instructions.
•
Rated Voltage
The LED illuminated units are rated at 6V, 12V, 24V, 110V, or 230/
240V AC/DC, and can be used within ±10% the rated voltage of
either AC or DC, except the 230/240V AC/DC types can be used on
250V AC/DC maximum.
•
DC Power
1. Switching power supply
Regulated voltage from a 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 voltage 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 volt-
age of ±10% the rated voltage, except the 230/240V AC/DC types
on 250V AC/DC maximum.
3. Full-wave rectification
Since the LED lamp is AC/DC compatible, a diode bridge for rec-
tification is not necess
ary. 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 brightness.
4. Single-phase half-wave rectification
This is not suitable for the power source of LED lamps. Use con-
stant-voltage DC power.
•
Noise
LED elements deteriorate due to extraneous noise, resulting in sig-
nificant decrease in brightness, hue change, or failure of lighting.
When such effects are anticipated, take a protection 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 current through 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.
• When ordering, specify the Type No. and quantity.
• Replacement contact blocks are supplied in a package containing 10 pieces.
Precautions for Noise
When using the unibody pilot light in an environment where it is sub-
jected to noise, connect a noise suppressor across terminals X1 and
X2 as shown below.
Key Selector Switch
Before operation, ensure that the key is inserted into the key hole
completely. Operating the key selector switch with a loose key will
cause damage to the key selector switch.
Nameplate
When anti-rotation is not required, remove
the projection from the nameplate using pli-
ers.
Handling
Do not expose the switch to excessive shock
and vibration, otherwise the switch may be
deformed or damaged, causing malfunction
or operation failure.
X2
X1
Noise Suppressor
Projection
Nameplate
Instructions
LED with
transformer
LED
R
C
LED
Ry
Relay
coil or
solenoid
R
C
LED with
transformer
R: 120Ω(Reference values)
C: 0.1 µF
Ry
LED
Diode
Relay
coil or
solenoid
+
–
R
Io
Io: Leakage current when the output is off
R: Shunt resistor
LED
Ordering Information
(07/12/13)