Pushbutton operator
(lockout version shown)
Spring Washer
Legend plate
Cover
(cut-away shown)
Mounting block
1/16" hex head set screw
Double contact
block actuator
Lock washer
#6 – 32 screw
Mounting plate
#4 – 40 screw
Figure 4. Assembly of Single Pushbutton Operator
with 2 Contact Blocks
Double pushbuttons
• Install double pushbutton bearing and spring washer to the
front side of the cover by threading it down tight to the cover in
the desired location, see Figure 5. If a DL legend plate is
required, first position the legend plate onto the cover then the
spring washer. Thread the bearing into place. Next, position the
pushbutton guard onto the front of the cover with one
rectangular opening above the other. Using the two #5-40 x
3/16 screws, fasten the guard so that it is square to the cover.
On the inside of the cover, thread the mounting block to the
bearing. Orient the mounting block so that the contact blocks
will be in the desired position, see Figure 2.
Tighten the set-screw thereby locking the pushbutton assembly
to the cover. From the inside of the cover, insert the two
plungers through the pass through holes in the bearing.
• On the outside of the cover, place one spring onto each
plunger. Using a #6-32 x 3/8 countersunk screw, fasten the
proper colored pushbutton button onto the end of each plunger
in the operator location as required. Next, fasten the mounting
plate to the mounting block using the two #4-40 x 1/4 pan head
screws provided.
• Assemble the necessary contact blocks per instructions in
INSTALLATION OF CONTACT BLOCK section.
IF 1418 • 01/05
Copyright © 2005, Cooper Industries, Inc.
#6 - 32 x 3/8 countersunk screw
Pushbutton Button
Spring
#5 - 40 x 3/16 screw
Pushbutton Guard
Bearing
Spring Washer
Legend plate
Cover
(cut-away shown)
Mounting block
1/16" hex head set screw
Plunger
Mounting plate
#4 – 40 x 1/4 screw
Figure 5. Assembly of Double Pushbutton Operator
Momentary mushroom head pushbutton with one contact block
• Install pushbutton sub-assembly to the front side of the cover
by threading it down tight to the cover in the desired location.
Use a DL legend plate if required as noted in ASSEMBLY OF
PUSHBUTTONS.
• Fasten the mounting block to the inside of the cover. Orient the
mounting block so that the contact block is in the desired
position as shown in Figure 2. This step will allow the contact
block to be in the proper position. Tighten the set-screw
thereby locking the pushbutton assembly to the cover, see
Figure 6. Tighten the set-screw thereby locking the pushbutton
assembly to the cover.
• Assemble the necessary contact block per instructions below.
Momentary mushroom head pushbutton with two contact blocks
• Install pushbutton sub-assembly to the front side of the cover
by threading it down tight to the cover in the desired location.
Use a DL legend plate if required as noted in ASSEMBLY OF
PUSHBUTTONS section.
• Fasten the mounting block to the inside of the cover. Orient the
mounting block so that the contact blocks will be in the desired
position, see Figure 2. Tighten the set-screw thereby locking
the pushbutton assembly to the cover, see Figure 6. Using the
one #6-32 x 5/16 pan head screw and lock washer, fasten the
double contact block actuator to the plunger of the pushbutton
operator assembly. Next, fasten the mounting plate to the
mounting block using the two #4-40 x 1/4 pan head screws
provided.
• Assemble the necessary contact blocks per instructions in
INSTALLATION OF CONTACT BLOCK section.
Material
used only
with double
contact
block
arrangement
Figure 6. Assembly of Momentary Mushroom Head
Pushbutton Operator
Maintained mushroom head pushbutton with contact block(s)
• Referring to Figure 7, install pushbutton sub-assembly
including lockout tab to the front side of the cover by threading
it down tight to the cover in the desired location. Orient this
assembly so that the lockout tab allows a hasp of the lock to
not interfere with an adjoining device. Use a DL legend plate if
required as noted in ASSEMBLY OF PUSHBUTTONS.
Page 3
IF 1418 • 01/05
• This step will allow the contact block(s) to be in the proper
position. Fasten the mounting block to the pushbutton sub
assembly on the inside of the cover. If using one contact block
(operator part number DEV11-S769), orient the mounting block
so that the two drilled and tapped mounting holes are parallel
to the long side of the cover. If two contact blocks (operator
part number DEV12-S769) are to be used, orient the contact
block mounting screws so that the two drilled and tapped
mounting holes are perpendicular to the long side of the cover.
Tighten the setscrew using a 1/16" Allen wrench thereby
locking the pushbutton assembly to the cover, see Figure 7.
For DEV12-S769 only, using #6-32 screw and lock washer
fasten double contact block actuator to operator plunger. The
countersunk hole is designed to accept this screw head.
Fasten mounting plate to mounting block using two #4-40
screws and washers per Figure 7.
• Assemble the necessary contact block(s) per instructions in
INSTALLATION OF CONTACT BLOCK section.
• Note the mounting block may need to be backed off 1/2 turn to
ensure proper operation of contact blocks.
Mushroom head
pushbutton operator
Legend plate
Cover
(cut-away shown)
Mounting block
1/16" hex head
set screw
1/16" hex head
set screw
Double contact
block actuator
Lock washer
Material used
only with
#6 – 32 screw
double
contact
block
arrangement
Mounting Plate
(e.g. DEV12-S769
#4 – 40 x 1/4 screw
Figure 7. Assembly of Maintained Mushroom Head
Pushbutton Operator
Copyright © 2005, Cooper Industries, Inc.
Mushroom head
pushbutton operator
assembly
Spring Washer
Legend plate
Cover
(cut-away shown)
Mounting block
Double contact
block actuator
Lock washer
#6 – 32 screw
Mounting Plate
#4 Lock Washers
#4 – 40 x 1/4 screw
Page 4