GENERAL INFORMATION

ZLS series limit switches are specifically designed for world-

wide applications and is supported by Honeywell global

resources for sales and after sales service.

ZLS series limit switches are designed to the latest IEC

standard are available and include a wide range of EN50041

and EN50047 type switches. Miniature EN50047 limit

switches are available in metal and double insulated

enclosures and a metal enclosed 3-cable entry version

(EN50047 mounting compatible) is also offered.

Standard ZLS switch circuit variations include 2 and 3-circuit

versions with forced disconnect mechanism. ZLS includes

features to make quick installation easier and safer.

Customers will benefit from Honeywell’s vast experience in

serving world industries over many years.

Most ZLS versions are interchangeable with almost all other

makes of EN50041/47 switches.

TYPICAL APPLICATIONS

□ Machine tools: metal fabrication equipment, presses,

transfer lines and special machinery

□ Material handling equipment: conveyors, elevators, cranes

and hoists

□ Packaging machinery and process equipment

□ Textile machinery

□ Construction machinery and equipment, vehicles and lift

trucks

FEATURES

□ Designed to the new IEC standard for world-wide

applications

□ Positive opening of normal closed contact meets IEC947-

5-1-3 safety standard.

□ UL, CSA, and CE

□ Sealing up to IP/65/ IP 67

□ International conduit sizes

□ Design for ease of installation

□ Eleven basic switch versions, Wide choice of actuators

STANDARDS

IEC 947-1 explains the general rules relating to Low-voltage

switchgear and controlgear. The purpose of this standard is to

harmonize as much as possible the product performance and

test requirements for equipment where the rated voltage does

not exceed 1,000 VAC or 1,500 VDC.

IEC 947-5-1 is part 5 of the general rules which relates to

Controlcircuit devices and switching elements. Also within this

part there is a section which considers Special Requirements

For Control Switches With Positive Opening Operation. Any

control switch which has this positive opening operation and

conforms to these special requirements will be marked on the

outside of the product with this symbol:

The Contact Element Form defines the configuration of the

contacts and the number of contacts within the switch. e.g.

Form Za – both contact elements have the same polarity.

Form Zb – the two contact elements are electrically separated.

The Utilization Category defines the type of current carried (AC)

Alternating current, (DC) Direct current and the typical application

in which the switch is used e.g.

AC15 – Control of Electromagnetic Loads (less than 72VA)

DC13 – Control of electromagnets.

The contact rating Designation relates to the utilization

categories and defines the conventional thermal current lth (A),

rated operational current le (A) at rated operational voltages Ue

and the VA rating e.g.

A600 – The ‘‘A’’ denotes the maximum VA rating (AC) and the ‘‘600’’

denotes the maximum rated (AC) voltage.

Q300 – The ‘‘Q’’ denotes the maximum VA rating (DC) and the ‘‘300’’

denotes the maximum rated (DC) voltage.

These IEC standards have been adopted by CENELEC (The

European Commitee for Electrotechnical Standardization) and

have been identified by replacing IEC with EN 60 e.g.

IEC 947-5-1 then becomes EN 60947-5-1.

CENELEC has defined the dimensions and characteristics of two

types of limit switch in the standards EN 50041 and EN 50047.

These standards relate to Low voltage switchgear and

controlgear for industrial use and define the enclosure

dimensions, the operating point for various head actuators, the

earth terminal requirement, the terminal marking and the

minimum degree of IP protection.

ZLS Series Global Limit Switches