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 switchi ng 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 ra ted (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
how to read and understand the bar chart the following example relates to a unit which has a snap action basic and which has a roller pin plunger actuator i.e. zlcb01c. when reading these bar charts follow these rules: 1. check what type of actuator was used to test the product, this is on the drawings which show the head style available. it will be one of two types: a) vertical travel plunger b) linear cam travel 2. start reading from top left of figure b, at the arrow labeled ??a??. 3. follow the black arrows and the black strip on the chart. the black strip indicates that there is a circuit between the terminals whose numbers are shown on the left and when white there is no circuit. all dimensions are in mm/(inches). figure a figure b look at figures a and b as examples. actuator type used for test is the linear cam travel type (b) shown left. the start point is at the arrow marked ??a?? (see fig. b). this shows the free position to be 5.3mm from the vertical center line of the unit. at this stage there is a circuit between the terminals 21-22 but no circuit between terminals 13-14. the unit can be actuated until it reaches the operating position which is 10.5 mm from the center line ? a travel distance of 10.5 ? 5.3 =5.2 mm from the free position. at this point the circuit arrangement changes ? no circuit between 21-22 but making a circuit between 13-14. if, however, the contacts of terminals 21-22 weld together and will not separate, a mechanical safety feature will ta ke effect if the switch is travelled past the point from which positive opening is assured, 13.9 mm. actuator can continue to travel to the end position (o.t. overtravel position) at total travel position 17.3mm. as the switch returns it reaches the release position at 8.9 mm from the center line. the circuit will change back to the original state and the difference between the operating position and the release position gives what is known as the differential travel i.e. 10.5 ? 8.9 = 1.6 mm. the asterisk (*) indicates the point from which the positive opening is assured. zla zlb zlc zld zle zlf standard en 50041 en 50041 en 50047 en 50047 en 50047 3-cable entry en 50047 2-cable entry enclosure metal plastic me tal plastic metal plastic operating temperature -25~ +120 c -25~ +80 c -25~ +80 c -25~ +80 c -25~ +80 c -25~ +80 c humidity <95%rh <95%rh <95%rh <95%rh <95%rh <95%rh shock/vibration 10 g / 50 g 10 g / 50 g 10 g / 50 g 10 g / 50 g 10 g / 50 g 10 g / 50 g operating speed 0.05mm-2m/s 0.05mm-2m/s 0.05mm- 2m/s 0.05mm-2m/s 0.05mm-2m/s 0.05mm-2m/s operating frequency 120 ops/min 120 ops/min 120 ops/min 120 ops/min 120 ops/min 120 ops/min contact resistance <25m <25m <25m <25m <25m <25m degree of protection ip67 ip65 ip67 ip65 ip67 ip65 electrical rating ac15 a600 dc13 q300 ac15 a300 dc13 q300 ac15 a300 dc13 q300 ac15 a300 dc13 q300 ac15 a600 dc13 q300 ac15 a300 dc13 q300 dielectric strength 2500v 2500v 2500v 2500v 2500v 2500v mechanical life 10 7 10 7 10 7 10 7 10 7 10 7 electrical life 5x10 5 5x10 5 5x10 5 5x10 5 5x10 5 5x10 5 zls series global limit switches
mounting dimensions zls series global limit switches
contact block type 01 07 06 04 03 30 31 34 35 32 33 r 01 a1b a zla contact block type (see below) selection guide pull reset enclosure type zla en50041(metal) zlb en50041(plastic) zlc en50047(metal) zld en50047(plastic) zle 3-cable entry (metal) zlf 2-cable entry (plastic) m20 c 1/2 npt a conduit sizes acutator style (se e next page) 1no/1nc snap action 1no/1nc break before make 1no/1nc make before break 2nc slow action 2no slow action 3nc slow action 3no slow action 2nc/1no break before make 2nc/1no make before break 2nc/1no break before make 1nc/2no make before break zls series global limit switches
zla, zlb zlc, zld zle, zlf fixed side rotary lever a1a (plastic roller) a1b (metal roller) adj. side rotary lever a2a (plastic roller) a2b (metal roller) adj. side rotary rod a4j (metal rod) 50mm side rotary lever a1y (fixed) a2y (adjustable) yoke lever v spring coil: e7b plastic rod, spring coil: e6a cat whisker, spring coil: e5g zls series global limit switches
zla, zlb zlc, zld zle, zlf b (plunger) c (roller plunger) d (roller lever) f (vertical roller lever) f1 (roller lever) zls series global limit switches
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