Series YB2
Panel Seal Pushbuttons
D128
Indicators
AccessoriesSupplement
Tactiles
KeylocksRotaries
Pushbuttons
D
Illuminated PB
Slides
Programmable
Rockers
Touch Tilt
Toggles
www.nkkswitches.com
1. Remove knurled
mounting nut.
2. Remove bezel and
red o-ring from
housing. There are
two o-rings in this
assembly: one is
red, one is orange.
4. Align tabs (B) on both
sides of actuator with
the projections (A) inside
of the housing and push
actuator firmly down to
snap in.
5. Install the red o-ring
which was removed
in step 2 at the inside
bottom of the bezel.
6. Align tab inside of the bezel with keyway on housing and
bring bezel back into its original position.
7. Before installing into
panel, make sure that
the orange o-ring is
present at the back of
the bezel. Align keyway
on bezel with tab in
panel and push switch
all the way into the
panel.
8. Attach mounting nut behind panel and tighten. Make
sure that bezel and actuator fit properly and that there is
no space between bezel and panel. Do not overtighten.
Mounting torque: 0.785Nm (6.95 lb•in) maximum.
Optional socket wrench AT106 available.
AT106 Socket Wrench
3. Install LED.
LEDs
AT634 & AT636
LED AT628
LEDs AT625G,
AT631B,
AT632F
Align D-flat on LED with Part Number
on switch for appropriate polarity and
insert LED into base.
Align D-flat on LED with Part Number
on switch for appropriate polarity and
insert LED into base.
Bezel
(–
)
D-Flat
)
D-Fla
The larger metal part within the LED
represents the cathode (–). Align LED
for appropriate polarity and insert LED
into base.
ATTENTION
ELECTROSTATIC
SENSITIVE DEVICES
ATTENTION
ELECTROSTATIC
SENSITIVE DEVICES
ASSEMBLY INSTRUCTIONS FOR ROUND
Knurled
Mounting Nut
Red O-ring
Part Number
This Side
Cathode
Socket (–)
Anode
Socket (+)
Actuator
B
Housing
A
Actuator
Knurled
Mounting Nut
Panel
Bezel
Red O-ring
Bezel
Housing
Red
O-ring
Keyway
Tab
Bezel
Orange
O-ring
Keyway
TabPanel
Back of
Bezel
Bezel
