ZLS Series Global Limit Switches STANDARDS GENERAL INFORMATION IEC 947-1 explains the general rules relating to Low-voltage ZLS series limit switches are specifically designed for world- switchgear and controlgear. The purpose of this standard is to wide applications and is supported by Honeywell global harmonize as much as possible the product performance and resources for sales and after sales service. test requirements for equipment where the rated voltage does ZLS series limit switches are designed to the latest IEC not exceed 1,000 VAC or 1,500 VDC. standard are available and include a wide range of EN50041 IEC 947-5-1 is part 5 of the general rules which relates to and EN50047 type switches. Miniature EN50047 limit Controlcircuit devices and switching elements. Also within this switches are available in metal and double insulated part there is a section which considers Special Requirements enclosures and a metal enclosed 3-cable entry version For Control Switches With Positive Opening Operation. Any (EN50047 mounting compatible) is also offered. control switch which has this positive opening operation and Standard ZLS switch circuit variations include 2 and 3-circuit conforms to these special requirements will be marked on the versions with forced disconnect mechanism. ZLS includes outside of the product with this symbol: features to make quick installation easier and safer. Customers will benefit from Honeywells vast experience in The Contact Element Form defines the configuration of the serving world industries over many years. contacts and the number of contacts within the switch. e.g. Most ZLS versions are interchangeable with almost all other Form Za both contact elements have the same polarity. makes of EN50041/47 switches. Form Zb the two contact elements are electrically separated. The Utilization Category defines the type of current carried (AC) TYPICAL APPLICATIONS Alternating current, (DC) Direct current and the typical application Machine tools: metal fabrication equipment, presses, in which the switch is used e.g. transfer lines and special machinery AC15 Control of Electromagnetic Loads (less than 72VA) DC13 Control of electromagnets. Material handling equipment: conveyors, elevators, cranes The contact rating Designation relates to the utilization and hoists categories and defines the conventional thermal current lth (A), Packaging machinery and process equipment rated operational current le (A) at rated operational voltages Ue Textile machinery and the VA rating e.g. Construction machinery and equipment, vehicles and lift A600 The A denotes the maximum VA rating (AC) and the 600 trucks denotes the maximum rated (AC) voltage. Q300 The Q denotes the maximum VA rating (DC) and the 300 FEATURES denotes the maximum rated (DC) voltage. Designed to the new IEC standard for world-wide These IEC standards have been adopted by CENELEC (The applications European Commitee for Electrotechnical Standardization) and Positive opening of normal closed contact meets IEC947- have been identified by replacing IEC with EN 60 e.g. 5-1-3 safety standard. IEC 947-5-1 then becomes EN 60947-5-1. UL, CSA, and CE CENELEC has defined the dimensions and characteristics of two Sealing up to IP/65/ IP 67 types of limit switch in the standards EN 50041 and EN 50047. International conduit sizes These standards relate to Low voltage switchgear and Design for ease of installation controlgear for industrial use and define the enclosure Eleven basic switch versions, Wide choice of actuators 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 Look at Figures A and B as examples. Actuator type The following example relates to a unit which has a snap action used for test is the linear Cam travel type (b) shown basic and which has a roller pin plunger actuator i.e. ZLCB01C. left. The start point is at the arrow marked A (See fig. When reading these bar charts follow these rules: B). This shows the free position to be 5.3mm from the 1. Check what type of actuator was used to test the product, this is vertical center line of the unit. At this stage there is a on the drawings which show the head style available. It will be one circuit between the terminals 21-22 but no circuit of two types: between terminals a) Vertical travel plunger 13-14. The unit can be actuated until it reaches the b) Linear cam travel operating position which is 10.5 mm from the center 2. Start reading from top left of figure B, at the arrow labeled A. line a travel distance of 10.5 5.3 =5.2 mm from the 3. Follow the black arrows and the black strip on the chart. The free position. At this point the circuit arrangement black strip indicates that there is a circuit between the terminals changes no circuit between 21-22 but making a whose numbers are shown on the left and when white there is no circuit between 13-14. If, however, the contacts of circuit. terminals 21-22 weld together and will not separate, a All dimensions are in mm/(inches). mechanical safety feature will take 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 Figure A differential travel i.e. 10.5 8.9 = 1.6 mm. The asterisk (*) indicates the point from which the positive opening is assured. Figure B ZLA ZLB ZLC ZLD ZLE ZLF Standard EN 50041 EN 50041 EN 50047 EN 50047 EN 50047 EN 50047 3-cable entry 2-cable entry Enclosure Metal Plastic Metal Plastic Metal Plastic Operating -25~ +120 C -25~ +80 C -25~ +80 C -25~ +80 C -25~ +80 C -25~ +80 C Temperature 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- 0.05mm-2m/s 0.05mm-2m/s 0.05mm-2m/s 2m/s Operating 120 ops/min 120 ops/min 120 ops/min 120 ops/min 120 ops/min 120 ops/min Frequency Contact Resistance <25m <25m <25m <25m <25m <25m Degree of Protection IP67 IP65 IP67 IP65 IP67 IP65 Electrical Rating AC15 A600 AC15 A300 AC15 A300 AC15 A300 AC15 A600 AC15 A300 DC13 Q300 DC13 Q300 DC13 Q300 DC13 Q300 DC13 Q300 DC13 Q300 Dielectric Strength 2500V 2500V 2500V 2500V 2500V 2500V 7 7 7 7 7 7 Mechanical Life 10 10 10 10 10 10 5 5 5 5 5 5 Electrical Life 5X10 5X10 5X10 5X10 5X10 5X10