Multiple Limit Switch VB A New Monoblock Multiple Limit Switch Incorporating a Head Box with a Tough Head and Ensuring High Sealing Performance and a Mechanical Durability of 5,000,000 Operations • Used for the sequential control of a variety of engineering machines and belt conveyor lines. • Built-in oil filter shuts out oil and water. • Approved by EN, IEC, and CCC (Chinese standard). (Ground terminal models only.) • Ground terminal models bear the CE mark. Model Number Structure ■ Model Number Legend VB-@@@@@@ 1 2 3 4 5 6 1. Number of Plungers 2: 2 plungers 3: 3 plungers 4: 4 plungers 5: 5 plungers 6: 6 plungers 2. Actuator 1: Bevel plunger 2: Roller plunger 3. Switch Box 1: Flange switch box with two conduit holes on the side 2: Flange switch box with four conduit holes 4: Non-flange switch box with two conduit holes on the side 5: Non-flange switch box with four conduit holes Replaceable Switch Unit Rating Standard load model 192 Model VB-S101N Multiple Limit Switch VB 4. Scraper 1: NBR scraper 2: FPM scraper 5. Contact None: 10 A (standard) A: 0.1 A (micro load) 6. Ground Terminal None: Without ground terminal E: With ground terminal Ordering Information ■ List of Models Actuator Conduit Model With flange Roller plunger (with a 6.8-dia. roller) Two on the side Four Bevel plunger Two on the side Four Without flange VB-2211 VB-2241 VB-3211 VB-3241 VB-4211 VB-4241 VB-5211 VB-5241 VB-6211 VB-6241 VB-2221 VB-2251 VB-3221 VB-3251 VB-4221 VB-4251 VB-5221 VB-5251 VB-6221 VB-6251 VB-2111 VB-2141 VB-3111 VB-3141 VB-4111 VB-4141 VB-5111 VB-5141 VB-6111 --- VB-2121 VB-2151 VB-3121 VB-3151 VB-4121 VB-4151 VB-5121 --- VB-6121 --- Note: 1. Other than the above models, minute load models switching 0.1 A are available. When ordering a minute load model, add the suffix A to the model number (i.e., VB-2211A for example). 2. SC connectors can be connected to VB models. 3. Models with ground terminals are also available. When ordering a ground terminal model, add the suffix E to the model number (i.e., VB2211E for example). 4. Since the actuator is incorporated into the monoblock switch, the actuator cannot be replaced. Multiple Limit Switch VB 193 Specifications ■ Approved Standards Agency Standards File No. Approved models TÜV Rheinland EN60947-5-1 (IEC947-5-1) R9551017 Only models with ground terminals CCC (CQC) GB14048.5 2003010305077628 Ask your OMRON representative for information on approved models. Note: Ground terminal models only. ■ Approved Standard Ratings ■ General Ratings TÜV (EN60947-5-1) (Only Ground Terminal Models are Approved) Standard Load Rated voltage Resistive load Standard Load NC Applicable category and ratings AC-15 2 A/250 VAC DC-12 2 A/48 VDC Micro Load 125 VAC 10 A 250 VAC 10 A 125 VDC 0.6 A 250 VDC 0.3 A Inrush current Inrush current NC NO NO 24 A max. Note: The above currents are steady-state currents. Applicable category and ratings AC-14 0.1 A/125 VAC Micro Load Ratings Rated voltage DC-12 0.1 A/30 VDC CCC (GB14048.5) Applicable category and ratings Resistive load 125 VAC 0.1 A 8 VDC 0.1 A 30 VDC 0.1 A AC-15 2 A/250 VAC ■ Characteristics Degree of protection IP67 Durability (See note 2.) Mechanical: 5,000,000 operations min. Electrical: 300,000 operations min. (10 A at 250 VAC, resistive load) Operating speed 0.1 mm to 0.5 m/s Operating frequency Mechanical: 120 operations min. Electrical: 30 operations min. Rated frequency 50/60 Hz (AC) Insulation resistance 100 MΩ min. (at 500 VDC) Contact resistance 15 mΩ max. (initial value) Dielectric strength 1,000 VAC/Uimp 4,000 VAC between terminals of same polarity 1,500 VAC/Uimp 4,000 VAC between current-carrying metal parts and ground 1,500 VAC/Uimp 4,000 VAC between each terminal and non-current-carrying metal part Uimp 4 kV (EN60947-5-1) between terminals of different polarity Rated insulation voltage (Ui) 300 VAC (EN60947-5-1) Switching overvoltage 1,000 V max. (EN60947-5-1) Pollution degree (operating environment) 3 (EN60947-5-1) Short-circuit protective device (SCPD) 10 A fuse type gG or gI (IEC269) Conditional short-circuit current 100 A (EN60947-5-1) Conventional enclosed thermal current (Ithe) 5 A, 0.5 A (EN60947-5-1) Protection against electric shock Insulation class I (Use the grounding terminal or ground on the machine side.) Vibration resistance Malfunction: 10 to 55 Hz, 1.5-mm double amplitude Shock resistance Destruction: 1,000 m/s2 min. Malfunction: 200 m/s2 min. Ambient temperature Operating: –10°C to 80°C (with no icing) Ambient humidity Operating: 35% to 95% Weight Approx. 580 g (in the case of VB-4211) Note: 1. The above values are initial values. 2. The values are calculated at an operating temperature of 5°C to 35°C, and an operating humidity of 40% to 70%. Contact your OMRON sales representative for more detailed information on other operating environments. 194 Multiple Limit Switch VB Connections ■ Contact Form COM NC NO Nomenclature (for the VB-2211) Plunger Scraper Box Cover Seal, gasket Switch assembly Engineering Data ■ Electrical Durability (with more than 300,000 Operations) (Ambient temperature: 5°C to 35°C; Ambient humidity: 40% to 70%) Durability (x 104 operations) 1,000 700 500 300 Operating frequency: 30 operations/min 250 VAC, cosφ = 1 200 100 70 50 30 10 0 Switching current (A) Multiple Limit Switch VB 195 Dimensions Note: All units are in millimeters unless otherwise indicated. Bevel Plunger VB-@111 Two, 6+0.1-dia. holes for positioning Four, 6.5 dia. holes FP OP PT Bevel Plunger VB-@141 Cable drawing hole with 3 threads min. (G1/2) Two screw caps 8-dia. hard stainless steel plunger Two, 8.5±0.1 dia. holes FP OP Cable drawing hole with 3 threads min. (G1/2) Two screw caps PT 8-dia. hard stainless steel plunger Two, 8.5±0.1 dia. holes 114±0.8 Filter 98±0.2 50±0.2 50±0.2 25° to 30° 25° to 30° Scraper Filter Four, M4 x 10 screws 28±0.3 23.5 to 24.5 Dog setting Dog range 14±0.2 12±0.2 30±0.2 10.5 to 11.5 Dog setting range Scraper Four, M4 x 10 screws Pitch 68±0.8 12±0.2 30±0.2 Dog 68±0.8 Roller Plunger VB-@211 Two, 6+0.1-dia. holes for positioning Four, 6.5 dia. holes FP OP PT Roller Plunger VB-@241 Cable drawing hole with 3 threads min. (G1/2) Two screw caps FP OP PT 6.8 dia. x 3.7 Stainless steel roller Two, 8.5 ±0.1 dia. holes 6.8 dia. x 3.7 Stainless steel roller Filter 114±0.8 Two, 8.5 ±0.1 dia. holes Cable drawing hole with 3 threads min. (G1/2) Two screw caps 50±0.2 98±0.2 50±0.2 25° to 30° 25° to 30° Filter Four, M4 x 10 screws 28±0.3 Four, M4 x 10 screws Scraper 14±0.2 12+0.2 Dog 30±0.2 29.5 to 30.5 Dog setting range Scraper 16.5 to 17.5 Dog setting range Pitch 68±0.8 12±0.2 30±0.2 Dog 68±0.8 Model VB-@211 VB-@241 14.71 N VB-@111 14.71 N VB-@141 OF max. 14.71 N 14.71 N RF min. 4.90 N 4.90 N 4.90 N 4.90 N PT max. 1.5 mm 1.5 mm 1.5 mm 1.5 mm OT (see note 2) (3.5 mm) (3.5 mm) (3.5 mm) (3.5 mm) MD max. 0.5 mm 0.5 mm 0.5 mm 0.5 mm OP 32±0.4 mm 19±0.4 mm 26±0.4 mm 13±0.4 mm FP (see note 2) (33 mm) (20 mm) (27 mm) (14 mm) Note: 1. The above operating characteristic values apply to a single switch. 2. The OT and FP values are reference values. 3. The actual model numbers of each of the above VB models have a figure 2 to 6, which indicate the number of plungers. Number of plungers H 2 58 mm 3 70 mm 4 82 mm 5, 6 (see note) 106 mm Note: When five plungers are mounted in series, no outer actuator will be provided. 196 Multiple Limit Switch VB Precautions Refer to the “Precautions for General-purpose Limit Switches (Including Multiple Limit Switches, Mechanical Touch Switches, High-precision Switches, Touch Switches, On-site Flexible Switches; Not Including Safety Switches)” on page 17. ■ Correct Use Operating Environment Sealing • Seal material may deteriorate if a Switch is used outdoor or where subject to special cutting oils, solvents, or chemicals. Always appraise performance under actual application conditions and set suitable maintenance and replacement periods. • Install Switches where they will not be directly subject to cutting chips, dust, or dirt. The Actuator and Switch must also be protected from the accumulation of cutting chips or sludge. The switch box and cover are made of die-cast aluminum and the mounting part of the Switch is covered with a seal cap, and ensure a sealing performance of more than 98×103 Pa for the VB Multiple Limit Switch. Not Suitable Suitable The filter on the side of the head prevents oil and water from penetrating into the interior of the VB Multiple Limit Switch while preventing the internal pressure of the VB Multiple Limit Switch from rising when the plunger is pressed. The seal scraper on the tip of the actuator prevents chips and dust from penetrating into the moving parts of the VB Multiple Limit Switch. Operating plunger • Constantly subjecting a Switch to vibration or shock can result in wear, which can lead to contact interference with contacts, operation failure, reduced durability, and other problems. Excessive vibration or shock can lead to false contact operation or damage. Install Switches in locations not subject to shock and vibration and in orientations that will not produce resonance. • The Switches have physical contacts. Using them in environments containing silicon gas will result in the formation of silicon oxide (SiO2) due to arc energy. If silicon oxide accumulates on the contacts, contact interference can occur. If silicon oil, silicon filling agents, silicon cables, or other silicon products are present near the Switch, suppress arcing with contact protective circuits (surge killers) or remove the source of silicon gas. Be sure to connect a fuse with a breaking current 1.5 to 2 times larger than the rated current to the Switch in series in order to protect the Switch from damage due to short-circuiting. If the VB is used for EN ratings, use a gI or gG 10-A fuse approved by IEC269. Cap Seal cap Switch box Movable plunger Seal scraper Cap screw Cover Seal gasket O ring Standard switch Apply extra tightening to the cap screw on the conduit. In order to protect the plunger from abrasion and prolong its service life, apply a small amount of grease to the plunger and dog or cam that come into contact with the plunger. (Molybdenum disulfide grease is recommended.) Operation Make sure the notch of the plunger is not pressed into the scraper when operating the VB Multiple Limit Switch, otherwise chips or dust may penetrate into the VB Multiple Limit Switch. Multiple Limit Switch VB 197 Tightening Torque Wiring 1. Tighten each cover mounting screw to a torque of 1.18 to 1.37 N·m. 2. Tighten each switch terminal screw to a torque of 0.20 to 0.49 N·m if the mounting screw is M3 in size. Connect a cable with a thickness of 0.75 mm2 to the VB Multiple Limit Switch through the M3 round solderless terminals with insulation covers. Dimensions of Round Solderless Terminal D dia. dZ dia. Be sure to wire each solderless terminal correctly with a screw as shown below. Solderless terminal Correct Incorrect dz dia.: D dia.: B: L: F: l: 3.2 1.9 5.2 16.4 5.8 8.0 (mm) Wiring (Ground Terminal Models) SC connector Terminal screw 3. Apply a torque of 5.88 to 6.86 N·m to tighten each mounting bolt of the casing if the mounting bolt is an Allen-head bolt that is M6 in size. Apply a torque of 8.04 to 9.22 N·m instead if the mounting bolt is an Allen-head bolt that is M8 in size. Built-in switch Ground terminal ■ Mounting VB Mounting Holes Note: Consult your OMRON representative for details on models with 3 to 6 plungers. With a Flange Switch Box Four, 6.5-dia. or M6 mounting holes Two, 8.5-dia. or M8 mounting holes Others Carefully connect a conduit to each conduit hole and apply a seal or tape to seal the conduit hole so that cuttings or other materials will not penetrate through the conduit hole. Use the SC Connector. Consult your OMRON representative for details on SC Connectors. Two, 6 dia. -0.05/−0.15 protruding positions Make sure that the position of the actuator that is traveling does not exceed the overtravel (OT) position. Without a Flange Switch Box Two, 8.5-dia. or M8 mounting holes 198 Multiple Limit Switch VB Make sure that the operating stroke is 70% to 100% of the specified OT distance. Terms and Conditions of Sale 1. Offer; Acceptance. These terms and conditions (these "Terms") are deemed part of all quotes, agreements, purchase orders, acknowledgments, price lists, catalogs, manuals, brochures and other documents, whether electronic or in writing, relating to the sale of products or services (collectively, the "Products") by Omron Electronics LLC and its subsidiary companies (“Omron”). Omron objects to any terms or conditions proposed in Buyer’s purchase order or other documents which are inconsistent with, or in addition to, these Terms. 2. Prices; Payment Terms. All prices stated are current, subject to change without notice by Omron. 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Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine, system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases but the following is a non-exhaustive list of applications for which particular attention must be given: (i) Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this document. (ii) Use in consumer products or any use in significant quantities. (iii) Energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles, safety equipment, and installations subject to separate industry or government regulations. (iv) Systems, machines and equipment that could present a risk to life or property. Please know and observe all prohibitions of use applicable to this Product. NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO 2. 3. 4. 5. ADDRESS THE RISKS, AND THAT THE OMRON’S PRODUCT IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM. Programmable Products. Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence thereof. Performance Data. Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate it to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability. Change in Specifications. Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our practice to change part numbers when published ratings or features are changed, or when significant construction changes are made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at any time to confirm actual specifications of purchased Product. Errors and Omissions. 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