Datasheet

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B-136
APEM
Switches &
Pilot Lights
Control Boxes
Emergency
Stop Switches
Enabling
Switches
Safety Products
Explosion Proof
Terminal Blocks
Relays & Sockets
Circuit
Protectors
Power Supplies
LED Illumination
Controllers
Operator
Interfaces
Sensors
AUTO-ID
Switches & Pilot Lights
Flush Silhouette
ø16
ø22
ø30
Miniature
Pilot Lights
CW
LW-F
LB
LBW
UP
Flush Bezel
LB/LBW Series
Countermeasures against Dim Lighting
Leakage currents through transistors or a contact protection circuit
may cause the LED lamp to illuminate dimly even when the output is
off.
When the LED lamp is illuminated by a transistor output, take the
following measure.
LED
Pilot
Light
Shunt Resistor
Leakage Current Shunt Resistor Allotment Table (Recommended)
Leakage Current
Io
Shunt resistance R
Red (R), White (W) Green (G)
Resistance Rated Power Resistance Rated Power
0.1 mA max. 13kΩ 0.25W 18kΩ 0.25W
0.1 to 0.7 mA 2kΩ 0.25W 2.7kΩ 0.25W
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 protection measure
shown below. However, measures may differ according to operating
environment and condition
Zener Diode
(–)(+)
(Zener diode reference value)
Zener voltage: 4.3 to 4.7V
Static Electricity (UP Series)
UP series are delicate products that may be damaged by static
electricity Make sure to take measures to prevent static electricity.
Switch Guards
Opening/closing the Switch Guard
When opening/closing the switch guard while the switch guard is not
installed on a panel, make sure to hold the hinge. Holding the base
might result in damage. Also do not apply force on the guard in other
than open/close directions, otherwise the hinge may be damaged.
Hinge
Base
Rubber Gasket when using LB9Z-K2 Switch Guard (remains
open) for Round/Square Units
Choose to use or not to use the rubber gasket for the switch referring
to the conditions described below. Note that the degree of protection is
IP40 with or without the rubber gasket.
• When the panel thickness is up to 2.8mm
Install the switch onto the switch guard with rubber gasket, and
mount on the panel.
w/rubber gasket
a) Panel thickness 2.8mm max.
b) Panel thickness 2.8 to 3.2mm
c) Single board mounting
w/o rubber gasket w/o rubber gasket
• When the panel thickness is 2.8 to 3.2mm
Remove the rubber gasket from the switch and install the switch
onto the switch guard, and mount on the panel (discard the rubber
gasket).
w/rubber gasket
a) Panel thickness 2.8mm max.
b) Panel thickness 2.8 to 3.2mm
c) Single board mounting
w/o rubber gasket w/o rubber gasket
• Single board mounting
Remove the rubber gasket from the switch and install the switch
onto the switch guard, and mount on the panel (discard the rubber
gasket).
w/rubber gasket
a) Panel thickness 2.8mm max.
b) Panel thickness 2.8 to 3.2mm
c) Single board mounting
w/o rubber gasket w/o rubber gasket
Instructions
SEUEN01A_B LB June 2021
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