Omron Z - User Manual

General-purpose Basic Switch Z F-157
Limit
Switches
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
General-purpose
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.
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
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.)
Basic models
Split-contact models
Maintained-contact models
General-purpose
Drip-proof Without terminal protective cover
With terminal protective cover
Molded terminal
General-purpose
Refer to page 3.
Refer to page 5.
Refer to page 4.
Refer to page 5.
General-purpose
Refer to individual datasheets.
(Contact your OMRON representative).
Refer to individual datasheets.
(Contact your OMRON representative).

Omron Z Specifications

General

Vibration Resistance	10 to 55 Hz, 1.5 mm double amplitude
Actuator Type	Pin Plunger
Contact Form	SPDT
Operating Force	0.49 N
Electrical Life	100, 000 cycles
Mechanical Life	10, 000, 000 cycles
Contact Resistance	100 mΩ max
Insulation Resistance	100 MΩ min
Operating Temperature	-25°C to +85°C (with no icing or condensation)
Storage Temperature	-40°C to 85°C
Operating Humidity	85% RH max.
Storage Humidity	85% RH max.
Mounting Type	Varies by model (e.g., Screw, Panel)

Summary

Model Number Structure

Configuration

Details the breakdown and meaning of characters in the OMRON Z series basic switch model numbers.

Model Number Legend

Specifications

Approved Standard Ratings

Ratings

Provides detailed electrical performance ratings for various load types and voltages.

Characteristics

Durability

Details the mechanical and electrical operational life expectancy of the switches.

Engineering Data

Mechanical Durability

Presents graphical data showing mechanical durability in relation to overtravel.

Electrical Durability

Shows graphical data illustrating electrical durability based on switching current.

Dimensions

Basic Models (General-purpose) & Split-contact Models

Provides dimensional drawings and specifications for standard and split-contact switch types.

Basic Models (Drip-proof) without Terminal Protective Cover

Offers dimensional data and diagrams for drip-proof switches without terminal protective covers.

Basic Models (Drip-proof) with Terminal Protective Cover

Maintained-contact Models

Precautions

Correct Use

Provides essential guidelines for the proper installation and operation of the switches.

Mounting

Explains the procedure for mounting the switch, including screw types and torque values.

Specific Model Precautions