Application ET Series Magnetically Held Toggle Switches Sheet Operation and Electrical Ratings PRINCIPLE OF OPERATION THREE 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 A holding coil in ET toggle switches replaces transferred and switch (B) circuit is unchanged. In mechanical holding mechanisms to maintain the the other extreme position, switch (B) circuit is toggle in an operate position. The toggle is released tranferred while switch (A) circuit is unchanged. 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. 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 ControlET Series Magnetically Held Toggle Switches Operation and Electrical Ratings ELECTRICAL RATINGS Amperage Sea Level (Sealed) 19,812 m 65,00 Feet Series Voltage Resistive Inductive Motor Resistive Inductive Motor 26ET 28 Vdc 4 2.5 4 4 2 4 25ET 28 Vdc 4 3 4 4 2.5 4 27ET 28 Vdc 7 2 - 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, Honeywells 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 Buyers 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 Printed with Soy Ink on 50% Recycled Paper 005419-1-EN IL50 GLO 1199 Printed in USA