MICRO SWITCH™ Environmentally Sealed Limit Switches, EN Series
STANDARD SWITCHES (see pages 4 and 5)
TERMINATION
While the standard EN Series provides a wide variety of products, Termination is specified in the order guides. Leadwires are
Honeywell offers a miniature EN Series and a special EN Series
per the following descriptions.
generally six feet long, and of the gage and military specifications
noted in the order guides.
MINIATURE SWITCHES (see pages 6 through 8)
MOUNTING
Miniature type EN switches meet the demand for smaller size
and lighter weight without sacrificing performance or electrical
capacity. These types are of the same construction, seal, and
materials as the standard size EN switches.
Plunger actuator switches mount through 5⁄8 in [Ø 0.625 in] or
15⁄32 in [Ø 0.469 in] holes. Lock washer, keyed washer, and wire
lock hexagon mounting nuts lock the switches in their mounting
holes.
Type 400EN switches are directly interchangeable with their
standard size EN counterpart, yet the housings are smaller in
diameter and lighter in weight. The miniature-size housing is 7,92
mm [0.312 in] smaller in diameter, and the switch weighs 9,1 g
[0.3 oz] less.
Rotary-actuated switches mount through 15⁄32 in [Ø 0.469 in]
holes. A lock washer, wire lock hexagon nut, and locating pins on
the top of the housing prevent switch rotation.
Figure 1. Typical EN Switch Construction
SWITCHES WITH SPECIAL REQUIREMENTS
(see page 9)
High velocity actuation
This switch (1EN231-6) is designed to withstand near ‘‘hammer-
blow’’ actuation as is found in over-center locking mechanisms. It
is dimensionally interchangeable with standard listing 1EN1-6.
Low force operation
Special spring construction within this switch (1EN51-6) reduces
the normal 6 lb to 12 lb (26,7 N to 53,4 N) EN operating force to
3 lb to 6 lb (13,3 N to 26,7 N). This switch is also dimensionally
interchangeable with the standard size 1EN1-6.
Figure 2. Circuitry Diagrams
Increased overtravel
A longer plunger and bushing on the switch (1EN61-6) extends
the EN overtravel capabilities from the normal 6,35 mm to
21,8 mm [0.25 in to 0.86 in]. The longer bushing also permits
additional adjustment of the plunger position or installations
where an increased bushing length is required.
High impact shock
Catalog listing, 1EN75-R3 (M8805/65-001), has been qualified
to MIL-PRF-8805, including high impact shock class H. Other
switches rated for high impact shock applications incorporate
the same plunger mechanism and internal switch design as
used in the 1EN75-R3 and are expected to conform to the same
requirements.
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