General-purpose Basic Switch Z Best-selling Basic Switch Boasting High Precision and Wide Variety • A large switching capacity of 15 A with high repeat accuracy. • A wide range of variations in contact form for your selection: ba- sic, split-contact, maintained-contact, and adjustable contact gap types. • A series of standard models for micro loads is available. • A series of molded terminal-type models incorporating safety terminal protective cover is available. Model Number Structure ■ Configuration Basic models Split-contact models General-purpose Drip-proofWithout terminal protective cover With terminal protective cover Molded terminal General-purpose Refer to page 3. Refer to individual datasheets. (Contact your OMRON representative). Refer to individual datasheets. (Contact your OMRON representative). Refer to page 5. Refer to page 4. Maintained-contact models Basic Models General-purpose General-purpose Refer to page 5. Maintained-contact Models The maintained-contact type has a reset button at the bottom of the switch case, in addition to the pushbutton (plunger) located on the A variety of actuators is available for a wide range of application. The contact mechanism of models for micro loads is a crossbar type with gold-alloy contacts, which ensures highly reliable operations for micro loads. Contact Gap: H: 0.25 mm (high-sensitivity, micro voltage current load) G: 0.5 mm (standard) E: 1.8 mm (high-capacity) F: 1.0 mm (split-contact models) Split-contact Models This type is identical in construction to the general-purpose basic switch except that it has two pairs of simultaneous acting contacts by splitting moving contacts. Since the moving contacts are connected to a common terminal, either parallel or series connection is possible. Highly reliable micro load switching is ensured if the model is used as a twin-contact switch. opposite side of the reset button. Use these buttons alternately. Since the Switch has greater pretravel than overtravel, it is suitable for use in reversible control circuits, manual reset circuits, safety limit circuits, and other circuits which are not preferable for automatic resetting. (For further details, refer to individual datasheets.) General-purpose Basic Switch Z F-157
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