ET Series Magnetically Held Toggle Switches
Operation and Electrical Ratings
PRINCIPLE OF OPERATION
Application
Sheet
THREE POSITION
A holding coil in ET toggle switches replaces
mechanical holding mechanisms to maintain the
toggle in an operate position. The toggle is released
by breaking the coil circuit.
When the hold in coil circuit is open, the ET
functions as a momentary contact switch. When the
coil is energized (through remote contacts), the
toggle lever will be held (maintained) in the operate
position. De-energizing the coil causes the lever to
snap back to the unoperated position. The lever can
also be released manually (overridden).
The solenoid has a hold in capacity only. It will not
pull the toggle lever into an operating position from
an unoperated position.
TWO POSITION.
ETs with two SPDT circuits have a magnetic hold
in capability in both directions from center. When
the lever is in the center position, the circuitry is as
shown in the illustration above. When the lever is
moved to one extreme position, switch (A) circuit is
transferred and switch (B) circuit is unchanged. In
the other extreme position, switch (B) circuit is
tranferred while switch (A) circuit is unchanged.
Photo 1
Photo 2
Photo 3
The illustration above shows the operating
sequence for an ET with one SPDT circuit. (1)
circuit closed manually; (2) energized solenoid
holds switch circuit closed; and (3) remote control
breaks solenoid circuit, releases the toggle, and
opens the switch circuit. (In ETs with two SPDT
circuits, both circuits transfer when the lever is
operated.)
Sensing and Control
ET Series Magnetically Held Toggle Switches
Operation and Electrical Ratings
ELECTRICAL RATINGS
Amperage
Series
26ET
25ET
27ET
Voltage
28 Vdc
28 Vdc
28 Vdc
Sea Level (Sealed)
Resistive Inductive
Motor
4
2.5
4
4
3
4
7
2
-
19,812 m [65,00 Feet]
Resistive Inductive
Motor
4
2
4
4
2.5
4
5
1.5
-
WARRANTY/REMEDY
Honeywell warrants goods of its manufacture as
being free of defective materials and faulty
workmanship. Commencing with date of shipment,
Honeywell’s warranty runs for 18 months. If
warranted goods are returned to Honeywell during
that period of coverage, Honeywell will repair or
replace without charge those items it finds
defective. The foregoing is Buyer’s sole remedy and
is
in lieu of all other warranties, expressed or
implied, including those of merchantability and
fitness for a particular purpose.
For application assistance, current specifications,
pricing or name of the nearest Authorized
Distributor, contact a nearby sales office. Or call:
1-800-537-6945 USA
1-800-737-3360 Canada
1-815-235-6847 International
FAX
1-815-235-6545 USA
INTERNET
www.honeywell.com/sensing
info@micro.honeywell.com
Sensing and Control
Honeywell Inc.
11 West Spring Street
Freeport, Illinois 61032
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