
Panel Seal Pushbuttons
ASSEMBLY INSTRUCTIONS FOR SQUARE
Series YB2
1. Remove knurled
mounting nut.
5. Install the blue o-ring
which was removed
in step 2 at the inside
bottom of the bezel.
Blue O-ring
Bezel
Spacer
Knurled
Mounting Nut
6. Align tab inside of the bezel with keyway on housing and
bring bezel back into its original position.
Housing
D
2. Remove bezel
and blue o-ring
from housing.
Bezel
Blue O-ring
Blue O-ring
Bezel
Keyway
Tab
( –)
3. Install LED.
LEDs
AT634 & AT636
D-Flat
(+)
Part Number
This Side
Cathode
Socket (–)
Anode
Socket (+)
ATTENTION
ELECTROSTATIC
SENSITIVE DEVICES
Align D-flat on LED with Part Number
on switch for appropriate polarity and
insert LED into base.
7. Before installing into
panel, make sure that
the square gasket 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.
Back of
Bezel
Panel
Bezel
LED AT628
D-Flat
Align D-flat on LED with Part Number
on switch for appropriate polarity and
insert LED into base.
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.
( –)
(+)
LEDs AT625G,
AT631B,
AT632F
ATTENTION
ELECTROSTATIC
SENSITIVE DEVICES
The larger metal part within the LED
represents the cathode (–). Align LED
for appropriate polarity and insert LED
into base.
Optional socket wrench AT106 available.
Actuator
Bezel
Panel
(+)
( –)
Cathode ( –)
Anode (+)
Spacer
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.
B
Actuator
A
Housing
Knurled
Mounting Nut
AT106 Socket Wrench
www.nkk.com
D123