2
Honeywell Sensing and Control
Enclosed Basic Series Limit Switches
ISSUE 5
88173
FIELD ADJUSTABLE ACTUATOR MODELS
Some enclosed basic switches are field adjustable. This in-
cludes models with the nomenclature “2RN2”, ”2RQ2”, ”2RN28”,
”2RQ28”, “2RN62”, “2RQ62”, “RQ2X2”, “RN2X1”.
ADJUSTABLE RANGE
ADJUSTABLE RANGE
360~ ABOUT THE PLUNGER AXIS
LEVER BASE
RETAINING NUT
LEVER
RETAINING NUT
The lever can be adjusted in two ways. The following process
details how to perform the adjustments.
Adjusting the horizontal position of the lever.
1. Loosen the lever base retaining nut, so that the lever assem
-
bly is free to rotate about the axis of the plunger.
2. Rotate the lever to the desired position. The lever is adjust
-
able 360 degrees about the axis.
3. Once the desired position is reached re-tighten the lever
base retaining nut. The lever base should not be able to
rotate when properly tightend.
Adjusting the vertical position of the lever.
1. Loosen the lever retaining nut, so that the lever freely rotates.
2. Set the position of the lever to the desired position. Roller
levers should be positioned so that they are able to actuate
the plunger.
3. Once the desired position is reached re-tighten the lever re-
taining nut. When pushed the lever should act upon the lever
mechanism to actuate the switch.
N18 TYPES
If actuator or basic switch is replaced, the actuator may need
adjustment to duplicate original switch operating point. To adjust
operating point, remove lower seal band from base of seal boot.
“Peel back” seal boot to expose bushing. With basic switch
unoperated,
slowly turn bushing clockwise until basic switch op-
erates.
Do not turn further after operating click is heard.
Turn
bushing back 1/2 turn. Tighten jam nut on bushing.
MAINTAINED CONTACT (RESET) MODELS
Listings with an “X” in their part number are maintained contact
switches. These switches remain actuated after the operating
force on either plunger has been applied. The actuated plunger
will “reset” when the opposing plunger is actuated.
NOTE: The top plungers (the plungers on the stationary portion
of the housing) provide more accurate and uniform operation
than the “reset” plungers and should be used when closely held
operating characteristics are required.
Vertical Adjustment Range
N2 & Q2 - Roller lever
225°
To adjust: loosen
hex nut, adjust arm
to desired position,
tighten hexnut.
N4 & Q4 - Hand op.
180°
N62 & Q62 - Rod lever
225°
N28 & Q28 - One way
180°
1. One lever arm serration: 8.18°.
2. One serration of lever arm and fluted washer as a unit: 8°.
3. One serration of lever arm with one serration of fluted washer
in opposite direction: 0.18°.
LUBRICATING INSTRUCTIONS for Roller Plunger
Switches only (N80, N81, Q8, Q9, Q81)
For maximum life, periodically put a drop or two of lightweight
oil on the roller. Specific application conditions will determine
lubricating frequency.
