Single-phase Overvoltage/Undervoltage Relay K8AK-VW Ideal for Voltage Monitoring for Industrial Facilities and Equipment. * Monitor for overvoltages and undervoltages simultaneously. Separate settings and outputs supported for overvoltages and undervoltages. * Manual resetting and automatically resetting supported by one Relay. * Pre-alarm Monitoring Mode. * Two SPDT output relays, 5 A at 250 VAC (resistive load). * Process control signal (0 to 10 V) and current splitter input supported. * Output status can be monitored using LED indicator. * Input frequency of 40 to 500 Hz supported. * Inputs are isolated from the power supply. For the most recent information on models that have been certified for safety standards, refer to your OMRON website. Refer to Safety Precautions on page 9. Refer to page 8 for commonly asked questions. Ordering Information List of Models Setting range Power supply voltage Model 1 to 10 V AC/DC 3 to 30 V AC/DC 15 to 150 V AC/DC 24 VAC/DC K8AK-VW2 24 VAC/DC 100 to 240 VAC K8AK-VW2 100-240 VAC 20 to 200 V AC/DC 30 to 300 V AC/DC 60 to 600 V AC/DC 24 VAC/DC K8AK-VW3 24 VAC/DC 100 to 240 VAC K8AK-VW3 100-240 VAC Ratings and Specifications Input Range Model K8AK-VW2 K8AK-VW3 Range* Connection terminal 0 to 10 V AC/DC V1-COM 0 to 30 V AC/DC V2-COM 0 to 150 V AC/DC V3-COM 0 to 200 V AC/DC V1-COM 0 to 300 V AC/DC V2-COM 0 to 600 V AC/DC V3-COM Setting range 1 to 10 V AC/DC 3 to 30 V AC/DC 15 to 150 V AC/DC 20 to 200 V AC/DC 30 to 300 V AC/DC 60 to 600 V AC/DC Input impedance Overload capacity Approx. 120 k Approx. 320 k Approx. 1.6 M Approx. 1.2 M Approx. 1.7 M Continuous input at 115% of maximum input. 10 s at 125% (up to 600 VAC) Approx. 3.1 M * The range is selected using connected terminals. 1 K8AK-VW Ratings Power supply voltage Isolated power supply Power consumption 24 VAC/DC 100 to 240 VAC 24 VAC/DC: 2.0 VA/1.1 W max. 100 to 240 VAC: 4.6 VA max. 10% to 100% of the maximum value of the setting range K8AK-VW2: 1 to 10 V AC/DC 3 to 30 V AC/DC Operating value setting range (AL1 and AL2) 15 to 150 V AC/DC K8AK-VW3: 20 to 200 V AC/DC 30 to 300 V AC/DC 60 to 600 V AC/DC 2 Operating value 100% operation at set value Reset value 5% of operating value (fixed) Reset method Manual reset/automatic reset (switchable) Note: Manual reset: Turn OFF power supply for 1 s or longer. Operating time setting range (T) 0.1 to 30 s Power ON lock time (LOCK) 1 s or 5 s (Switched using DIP switch.) Indicators Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (AL1, AL2): Red Input impedance Refer to Input Range on previous page. Output relays Two SPDT relays (NC operation) Output relay ratings Rated load Resistive load 5 A at 250 VAC 5 A at 30 VDC Maximum switching capacity: 1,250 VA, 150 W Minimum load: 5 VDC, 10 mA (reference values) Mechanical life: 10 million operations min. Electrical life: 5 A at 250 VAC or 30 VDC: 50,000 operations 3 A at 250 VAC or 30 VDC: 100,000 operations Ambient operating temperature -20 to 60C (with no condensation or icing) Storage temperature -25 to 65C (with no condensation or icing) Ambient operating humidity 25% to 85% (with no condensation) Storage humidity 25% to 85% (with no condensation) Altitude 2,000 m max. Terminal screw tightening torque 0.49 to 0.59 N*m Terminal wiring method Recommended wire Solid wire: 2.5 mm2 Twisted wires: AWG16, AWG18 Note: 1. Ferrules with insulating sleeves must be used with twisted wires. 2. Two wires can be twisted together. Recommended ferrules Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact Al 1-8RD (for AWG18) manufactured by Phoenix Contact Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact Case color N1.5 Case material PC and ABS, UL 94 V-0 Weight Approx. 150 g Mounting Mounts to DIN Track. Dimensions 22.5 x 90 x 100 mm (WxHxD) K8AK-VW Specifications Allowable operating voltage range 85% to 110% of rated power supply voltage Allowable operating frequency range 50/60 Hz 5 Hz Input frequency range 40 to 500 Hz Overload capacity Continuous input at 115% of maximum input, 10 s at 125% (up to 600 VAC). Repeat error Applicable standards Operating value 0.5% full scale (at 25C and an ambient humidity of 65% at the rated power supply voltage, DC and 50/60 Hz sine wave input) Operating time 50 ms (at 25C and 65% humidity, rated power supply voltage) Conforming standards EN 60947-5-1 Installation environment (pollution level 2, installation category III) EMC EN 60947-5-1 Safety standards UL 508 (Recognition), Korean Radio Waves Act (Act 10564), CSA: C22.2 No.14, CCC: GB14048.5 Insulation resistance 20 M min. Between all external terminals and the case Between all power supply terminals and all input terminals Between all power supply terminals and all output terminals Between all input terminals and all output terminals Dielectric strength 2,000 VAC for 1 min Between all external terminals and the case Between all power supply terminals and all input terminals Between all power supply terminals and all output terminals Between all input terminals and all output terminals Noise immunity 1,500 V power supply terminal common/normal mode Square-wave noise of 1 s/100 ns pulse width with 1-ns rise time Vibration resistance Frequency: 10 to 55 Hz, acceleration 50 m/s2 10 sweeps of 5 min each in X,Y, and Z directions Shock resistance 100 m/s2, 3 times each in 6 directions along 3 axes Degree of protection Terminals: IP20 Connections Terminal Diagram K8AK-VW2 100-240VAC A B Control Output Relay Output Relay output 250 VAC, 5 A (resistive load) 30 VDC, 5 A (resistive load) Common 21 A Voltage Input AL2 24 21 24 22 V1 V2 V3 22 VW3 VW2 V2 V1 V3 V2 V1 V3 600 V max. 150 V max. 300 V max. 30 V max. 200 V max. 10 V max. C C B Power Supply Voltage 100 to 240 VAC A1 A2 24 VAC/DC A1 A2 A1 A2 C 11 12 14 Relay Output AL1 Common (No polarity) 11 Note: 1. 2. 3. 4. 12 14 There is no polarity for the DC power supply input. For the voltage input, you can input only from the C terminal and one other terminal. Refer to Setting Ranges and Wiring Connections for information on the V1, V2, and V3 voltage input terminals. Use the recommended ferrules if you use twisted wires. 3 K8AK-VW Wiring Example Single-phase power supply Load 21 24 22 V1 V2 V3 Power supply AC/DC A2 Power supply voltage A1 A1 A2 C 11 12 14 Timing Charts Overvoltage and Undervoltage Operation Diagram Undervoltage and Undervoltage Operation Diagram (Undervoltage Pre-alarm Mode) DIP switch settings: SW3 and SW4 both ON or both OFF. DIP switch settings: SW3 OFF and SW4 ON. Power supply voltage Power supply voltage Input Hysteresis: Fixed at 5% Undervoltage set value (AL1) Overvoltage set value (AL1) Hysteresis: Fixed at 5% Hysteresis: Fixed at 5% Undervoltage set value (AL2) Input Hysteresis: Fixed at 5% Undervoltage set value (AL2) Flashing AL1 alarm indicator Flashing t Lit AL2 alarm indicator Overvoltage (AL1) relay (11-14) Undervoltage (AL2) relay (21-24) t t1 Flashing Lit t: Operating time (0.1 to 30 s) Overvoltage and Overvoltage Operation Diagram (Overvoltage Pre-alarm Mode) DIP switch settings: SW3 ON and SW4 OFF. Power supply voltage Overvoltage setting (AL1) Hysteresis: Fixed at 5% Overvoltage setting (AL2) Hysteresis: Fixed at 5% Input Flashing Lit AL2 alarm indicator Overvoltage (AL1) relay (11-14) Overvoltage (AL2) relay (21-24) Lit t1: Power ON lock (1 s or 5 s) t1 Note: 1. The K8AK-VW@ output relay is normally operative. 2. The power ON lock prevents unnecessary alarms from being generated during the instable period when the power is first turned on. There is no relay output during timer operation. 4 Undervoltage (AL1) relay (11-14) Undervoltage (AL2) relay (21-24) Lit t1: Power ON lock (1 s or 5 s) t1 Note: 1. The K8AK-VW@ output relay is normally operative. 2. The power ON lock prevents unnecessary alarms from being generated during the instable period when the power is first turned on. There is no relay output during timer operation. Flashing Flashing AL2 alarm indicator t1: Power ON lock (1 s or 5 s) AL1 alarm indicator Lit AL1 alarm indicator t: Operating time (0.1 to 30 s) Note: 1. The K8AK-VW@ output relay is normally operative. 2. The power ON lock prevents unnecessary alarms from being generated during the instable period when the power is first turned on. There is no relay output during timer operation. K8AK-VW Nomenclature Indicators Front Item Terminal block (See notes 1 and 2.) Meaning Power indicator (PWR: Green) Lit when power is being supplied. Relay status indicator (RY: Yellow) Lit when relay operates (Not light when both AL1 and AL2 are in error status) (Normally lit) Alarm indicators (AL1 and AL2: Red) Lit when there is an overvoltage or undervoltage. The indicator flashes to indicate the error status after the input has exceeded the set value while the operating time is being clocked. Voltage knob (AL1) Power indicator Voltage knob (AL2) Relay status indicator Alarm indicator Operating time knob (T) Setting Knobs Item Terminal block (See notes 1 and 2.) Usage Voltage knob (AL1) Used to set the voltage to 10% to 100% of maximum setting range. Voltage knob (AL2) Used to set the voltage to 10% to 100% of maximum setting range. Operating time knob (T) Used to set the operating time to 0.1 to 30 s. Note: 1. Use either a solid wire of 2.5 mm2 maximum or a ferrule with insulating sleeve for the terminal connection. The length of the exposed current-carrying part inserted into the terminal must be 8 mm or less to maintain dielectric strength after connection. For 2.5 mm2 or smaller solid wires 8 mm max. For ferrules with an insulation sleeve. 8 mm max. Recommended ferrules Phoenix Contact * Al 1,5-8BK (for AWG16) * Al 1-8RD (for AWG18) * Al 0,75-8GY (for AWG18) 2. Screw tightening torque: 0.49 to 0.59 N*m 5 K8AK-VW Operation Methods Setting Ranges and Wiring Connections Model K8AK-VW2 K8AK-VW3 Setting range Wiring connection 1 to 10 V AC/DC V1-COM 3 to 30 V AC/DC V2-COM 15 to 150 V AC/DC V3-COM 20 to 200 V AC/DC V1-COM 30 to 300 V AC/DC V2-COM 60 to 600 V AC/DC V3-COM Connections Input Single-phase power Connect the input between terminals V1-COM, V2-COM, or V3-COM, depending on the input voltage. Malfunctions may occur if the input is connected to unused terminals and the Unit will not operate correctly. Power Supply Power supply voltage Connect the power supply to terminals A1 and A2. A1 A2 Outputs V1 AL1 (SPDT relay) is output to terminals 11, 12, and 14. AL2 (SPDT relay) is output to terminals 21, 22, and 24. Note: Use the recommended ferrules if using twisted wires. Voltage input V2 C (COM) V3 14 Signal output 12 24 Signal output 22 Load 11 AL1 relay signal output 21 AL2 relay signal output DIP Switch Settings The power ON lock time, resetting method and operating mode are set using the DIP switch located on the bottom of the Unit. DIP Switch Functions OFF OFF OFF 1 2 3 4 Pin ON ON SW4 SW3 SW2 SW1 DIP switch pins Power ON lock time --- --- --- 5s --- --- --- Resetting method Manual reset --- --- --- Operating mode --- --- --- Operating mode AL1 AL2 Overvoltage Undervoltage --- --- Overvoltage Overvoltage --- --- Undervoltage Undervoltage --- --- Overvoltage Undervoltage --- --- Note: All pins are set to OFF at the factory. 6 ON 1s K8AK-VW Setting Method Setting Voltage Operating Time The voltage knob (AL1 and AL2) is used to set the voltage. The voltage can be set to 10% to 100% of the maximum setting range. Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the set value and the input have reached the same level.) Use this as a guide to set the voltage. The maximum setting range will differ depending on the model and the input terminal. Example: K8AK-VW3 Using Input Terminal V3-COM The maximum setting range will be 600 VAC/VDC and the setting range will be 60 to 600 V. The operating time is set using the operating time knob (T). The operating time can be set to between 0.1 and 30 s. Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the set value and the input have reached the same level.) Use this as a guide to set the operating time. If the input exceeds (or drops lower than) the voltage set value, the alarm indicator will start flashing for the set period and then stay lit. Dimensions (Unit: mm) Single-phase Overvoltage/Undervoltage Relays K8AK-VW2 K8AK-VW3 22.5 100 90 72 5 Optional Parts for DIN Track Mounting DIN Tracks PFP-100N PFP-50N 7.30.15 4.5 350.3 15 25 10 25 25 1,000 (500)* 10 25 15 (5)* 270.15 1 *Dimensions in parentheses are for the PFP-50N. 7 K8AK-VW Questions and Answers Q Q Checking Operation Overvoltages Gradually increase the input from 80% of the set value. The input will equal the operating value when the input exceeds the set value and the alarm indicator starts flashing. Operation can be checked by the relay outputs that will start after the operating time has passed. Undervoltage Gradually decrease the input from 120% of the set value and check the operation using the same method as for overvoltage. Example: Overvoltage Operating Mode, Undervoltage Operating Mode and an Operating Time of 5 s Note: K8AK-VW@ output relays are normally operative. Set value Input voltage Flashing Alarm indicator Lit 5s Relay output Connection Diagram 200 VAC V 0 to 300 V Variable autotransformer C 200 V Cycle counter 8 Input terminals Power supply A1 A2 How to Measure the Operating Time Overvoltage Change the input suddenly from 0% to 120% of the set value and measure the time until the Unit operates. Undervoltage Change the input suddenly from 120% to 0% of the set value and measure the time until the Unit operates. Q Setting the Pre-alarm Monitoring Mode Use the DIP switch to set the operating mode pins both to overvoltage (SW3 ON and SW4 OFF) or both to undervoltage (SW3 OFF and SW4 ON). Example: Both Pins Set to Overvoltage AL1 can be used as the pre-alarm for AL2 by setting a smaller voltage set value for AL1 than for AL2. K8AK-VW Safety Precautions Be sure to read the precautions for all models in the website at the following URL: http://www.ia.omron.com/. Warning Indications WARNING Indicates a potentially hazardous situation which, if not avoided, will result in minor or moderate injury, or may result in serious injury or death. Additionally there may be significant property damage. CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury or in property damage. Precautions for Safe Use Supplementary comments on what to do or avoid doing, to use the product safely. Precautions for Correct Use Supplementary comments on what to do or avoid doing, to prevent failure to operate, malfunction, or undesirable effects on product performance. Meaning of Product Safety Symbols Used to warn of the risk of electric shock under specific conditions. WARNING Electrical shock may occasionally cause serious injury. Confirm that the input voltage is OFF before starting any wiring work and wire all connections correctly. CAUTION Electrical shock may cause minor injury. Do not touch terminals while electricity is being supplied. There is a risk of minor electrical shock, fire, or device failure. Do not allow any pieces of metal, conductors, or cutting chips that occur during the installation process to enter the product. Explosions may cause minor injuries. Do not use the product in locations with inflammable or explosive gases. Used for general prohibitions for which there is no specific symbol. There is a risk of minor electrical shock, fire, or device failure. Do not disassemble, modify, repair, or touch the inside of the product. Used to indicate prohibition when there is a risk of minor injury from electrical shock or other source if the product is disassembled. Loose screws may cause fires. Tighten terminal screws to the specified torque of 0.49 to 0.59 N*m. Used for general mandatory action precautions for which there is no specified symbol. Use of excessive torque may damage the terminal screws. Tighten terminal screws to the specified torque of 0.49 to 0.59 N*m. Use of the product beyond its life may result in contact welding or burning. Make sure to consider the actual operating conditions and use the product within its rated load and electrical life count. The life of the output relay varies significantly with the switching capacity and switching conditions. 9 K8AK-VW Precautions for Safe Use 1. Do not use or store the product in the following locations. * Locations subject to water or oil * Outdoor locations or under direct sunlight * Locations subject to dust or corrosive gases (particularly sulfurizing gases, ammonia, etc.) * Locations subject to rapid temperature changes * Locations prone to icing and dew condensation * Locations subject to excessive vibration or shock * Locations subject to wind and rain * Locations subject to static electricity and noise * Habitats of insects or small animals 2. Use and store the product in a location where the ambient temperature and humidity are within the specified ranges. If applicable, provide forced cooling. 3. Mount the product in the correct direction. 4. Check terminal polarity when wiring and wire all connections correctly. The power supply terminals do not have polarity. 5. Do not wire the input and output terminals incorrectly. 6. Make sure the power supply voltage and loads are within the specifications and ratings for the product. 7. Make sure the crimp terminals for wiring are of the specified size. 8. Do not connect anything to terminals that are not being used. 9. Use a power supply that will reach the rated voltage within 1 second after the power is turned ON. 10.Keep wiring separate from high voltages and power lines that draw large currents. Do not place product wiring in parallel with or in the same path as high-voltage or high-current lines. 11.Do not install the product near equipment that generates high frequencies or surges. 12.The product may cause incoming radio wave interference. Do not use the product near radio wave receivers. 13.Install an external switch or circuit breaker and label it clearly so that the operator can quickly turn OFF the power supply. 14.Make sure the indicators operate correctly. Depending on the application environment, the indicators may deteriorate prematurely and become difficult to see. 15.Do not use the product if it is accidentally dropped. The internal components may be damaged. 16.Be sure you understand the contents of this catalog and handle the product according to the instructions provided. 17.Do not install the product in any way that would place a load on it. 18.When discarding the product, properly dispose of it as industrial waste. 19.When using the product, remember that the power supply terminals carry a high voltage. 20.The product must be handled only by trained electrician. 21.Prior to operation, check the wiring before you supply power to the product. 22.Do not install the product immediately next to heat sources. 23.Perform periodic maintenance. Precautions for Correct Use Observe the following operating methods to prevent failure and malfunction. 1. Use the power supply voltage, input power, and other power supplies and converters with suitable capacities and rated outputs. 2. Use a precision screwdriver or similar tool to adjust the setting knobs. 3. Do not use the product in circuits with waveform distortion. Error will be large due to waveform distortion. 4. Error will be large if the product is used for thyristor or inverter control. 5. To reduce the error in the setting knob, always turn the setting knob from the minimum setting toward the maximum setting. 6. When cleaning the product, do not use thinners or solvents. Use commercial alcohol. Mounting and Removing * Mounting to DIN Track 1. Catch the upper hook on the DIN Track. 2. Push the product onto the Track until the hooks lock into place. A B * Removing from the DIN Track Pull down on the bottom hook with a flat-blade screwdriver and lift up on the product. Applicable DIN Tracks: PFP-100N (100 cm) PFP-50N (50 cm) Adjusting the Setting Knobs * Use a screwdriver to adjust the setting knobs. The knobs have a stopper that prevents them from turning beyond the full right or left position. Do not force a knob beyond these points. Setting knob 10 Terms and Conditions of Sale 1. 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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. 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OMRON AUTOMATION AND SAFETY * THE AMERICAS HEADQUARTERS * Chicago, IL USA * 847.843.7900 * 800.556.6766 * www.omron247.com OMRON CANADA, INC. * HEAD OFFICE Toronto, ON, Canada * 416.286.6465 * 866.986.6766 * www.omron247.com OMRON ARGENTINA * SALES OFFICE Cono Sur * 54.11.4783.5300 OMRON ELECTRONICS DE MEXICO * HEAD OFFICE Mexico DF * 52.55.59.01.43.00 * 01-800-226-6766 * mela@omron.com OMRON CHILE * SALES OFFICE Santiago * 56.9.9917.3920 OMRON ELECTRONICS DE MEXICO * SALES OFFICE Apodaca, N.L. * 52.81.11.56.99.20 * 01-800-226-6766 * mela@omron.com OTHER OMRON LATIN AMERICA SALES 54.11.4783.5300 OMRON ELETRONICA DO BRASIL LTDA * HEAD OFFICE Sao Paulo, SP, Brasil * 55.11.2101.6300 * www.omron.com.br OMRON EUROPE B.V. * Wegalaan 67-69, NL-2132 JD, Hoofddorp, The Netherlands. * +31 (0) 23 568 13 00 * www.industrial.omron.eu Authorized Distributor: Automation Control Systems * Machine Automation Controllers (MAC) * Programmable Controllers (PLC) * Operator interfaces (HMI) * Distributed I/O * Software Drives & Motion Controls * Servo & AC Drives * Motion Controllers & Encoders Temperature & Process Controllers * Single and Multi-loop Controllers Sensors & Vision * Proximity Sensors * Photoelectric Sensors * Fiber-Optic Sensors * Amplified Photomicrosensors * Measurement Sensors * Ultrasonic Sensors * Vision Sensors Industrial Components * RFID/Code Readers * Relays * Pushbuttons & Indicators * Limit and Basic Switches * Timers * Counters * Metering Devices * Power Supplies Safety * Laser Scanners * Safety Mats * Edges and Bumpers * Programmable Safety Controllers * Light Curtains * Safety Relays * Safety Interlock Switches /*& Note: Specifications are subject to change. Printed on recycled paper. (c) 2014 Omron Electronics LLC Printed in U.S.A. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Omron: K8AK-VW2 24VAC/DC K8AK-VW3 100-240VAC K8AK-VW2 100-240VAC K8AK-VW3 24VAC/DC