NEW Product Temperature Monitoring Relay K8AK-TH Compact and Slim Relay Ideal for Temperature Alarms and Monitoring • Excessive temperature increases can be prevented and abnormal temperatures can be monitored. • Temperature monitoring in slim design with a width of just 22.5 mm. • Rotary switches simplifies temperature settings. • Universal-input support for thermocouple or platinum resistance thermometer sensor input. • Change the output relay between normally open and normally closed operation. • Alarm status identification with LED indicator. • Self-holding output. • Alarm output status can be retained even if the power supply is turned OFF. Refer to Safety Precautions on page 8. For the most recent information on models that have been certified for safety standards, refer to your OMRON website. Ordering Information K8AK-TH (Temperature Input Models) Power supply voltage Type Output relays Input types Setting units (setting range) Model 100 to 240 VAC Temperature 1 relay input Thermocouple or platinum Setting unit: 1°C or 1°F (0 to 999°C/°F) K8AK-TH11S 100-240VAC resistance thermometer 24 VAC/DC Thermocouple or platinum Setting unit: 1°C or 1°F (0 to 999°C/°F) K8AK-TH11S 24VAC/DC resistance thermometer Thermocouple Thermocouple Setting unit: 10°C/°F* Setting unit: 10°C/°F* K8AK-TH12S 100-240VAC K8AK-TH12S 24VAC/DC * Refer to Setting Ranges on page 3 for the setting ranges. Note: When ordering, designate the power supply specification. Different Relay models are used for 100 to 240 VAC and 24 VAC/VDC. 1 K8AK-TH Specifications Ratings Item Power supply voltage Allowable voltage range Power consumption Sensor inputs 100 to 240 VAC 50/60 Hz 24 VAC 50/60 Hz or 24 VDC 85% to 110% of power supply voltage 5 VA max. 2 W max. (24 VDC), 4 VA max. (24 VAC) K8AK-TH11S Thermocouple: K, J, T, E; Platinum-resistance thermometer: Pt100, Pt1000 K8AK-TH12S Thermocouple: K, J, T, E, B, R, S, PLII Contact input ON: 1 kΩ max., OFF: 100 kΩ min. Output relay One SPDT relay (5 A at 250 VAC, resistive load) External inputs (for latch setting) Non-contact input ON residual voltage: 1.5 V max., OFF leakage current: 0.1 mA max. Leakage current: Approx. 10 mA Setting method Rotary switch setting (set of three switches) Indicators Power (PWR): Green LED, Relay output (ALM): Red LED Other functions Alarm Mode (upper limit/lower limit), non-fail safe/fail safe selection, output latch, setting protection, temperature unit °C/°F Ambient operating temperature −20 to 55°C (with no condensation or icing) Ambient operating humidity Relative humidity: 25% to 85% Storage temperature −25 to 65°C (with no condensation or icing) Characteristics Measurement accuracy K8AK-TH11S: ±1% of the setting range or ±4°C, whichever is larger K8AK-TH12S: ±1% of the setting range (±1% FS) hysteresis width 2°C Output relay 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/30 VDC: 100,000 operations Sampling cycle 100 ms Insulation resistance 20 MΩ (at 500 V) between charged terminals and exposed uncharged parts 20 MΩ (at 500 V) between any charged terminals (i.e., between input, output, and power supply terminals) 20 MΩ (at 500 V) between contacts (open) Dielectric strength 2,300 VAC, 50/60 Hz for 1 min between terminals of different charge Vibration resistance Vibration of 10 to 55 Hz and acceleration of 50 m/s2 for 5 min with 10 sweeps each in X, Y, and Z directions Shock resistance 100 m/s2, 3 times each in 6 directions along 3 axes Weight Approx. 160 g Degree of protection IP20 Memory protection Non-volatile memory (number of writes: 1 million) Safety Standards Approved standards UL 61010-1 Installation environment (pollution level 2, installation category II) EMC EN 61326-1 Industrial electromagnetic environment Application standards 2 UL 61010-1 (Recognition), Korean Radio Waves Act (Act 10564), CSA: C22.2 No.14, CCC: GB14048.5 Terminal screw tightening torque 0.49 to 0.59 N·m Crimp terminals Two solid wires of 2.5 mm2 or two ferrules of 1.5 mm2 with insulation sleeves can be tightened together. Case color N1.5 Case material PC and ABS, UL 94 V-0 Mounting Mounts to DIN Track. Dimensions 22.5 × 100 × 90 mm (W × D × H) K8AK-TH Setting Ranges ●K8AK-TH11S Centigrade Input 1,000 800 600 400 200 0 Setting temperature range K J T E Pt100 Pt1000 999 850 400 600 850 850 0 0 0 0 0 0 Minimum setting increment 1°C Fahrenheit Input 1,000 800 600 400 200 0 Setting temperature range K J T E Pt100 Pt1000 999 999 700 999 999 999 Å@ Å@ Å@ Å@ Å@ 0 0 0 0 0 0 Minimum setting increment 1°F ●K8AK-TH12S Centigrade Input Setting temperature range 1,800 1,700 1,600 1,500 1,400 1,300 1,200 1,100 1,000 900 800 700 600 500 400 300 200 100 0 K J T E B R S 1,700 1,700 PLII 1,800 1,300 1,300 850 600 400 100 0 0 0 0 Minimum setting increment 0 0 0 R S PLII 3,000 3,000 10°C Fahrenheit Input Setting temperature range 3,200 3,100 3,000 2,900 2,800 2,700 2,600 2,500 2,400 2,300 2,200 2,100 2,000 1,900 1,800 1,700 1,600 1,500 1,400 1,300 1,200 1,100 1,000 900 800 700 600 500 400 300 200 100 0 K J T E B 3,200 2,300 2,300 1,500 1,100 700 300 0 0 0 0 Minimum setting increment 0 0 Upper limit 1320 870 420 620 1820 1720 1720 1320 Lower limit −40 −40 −40 −40 0 −40 −40 −40 0 10°F ●Temperature Input Range TH11S Input type K J T E Pt100 Pt1000 ----- °C Lower limit −20 −20 −20 −20 −20 −20 ----- °F Upper limit 1019 870 420 620 870 870 ----- Lower limit −40 −40 −40 −40 −40 −40 ----- Upper limit 1039 1039 740 1039 1039 1039 ----- TH12S Input type K J T E B R S PLII °C Lower limit −20 −20 −20 −20 0 −20 −20 −20 °F Upper limit 2340 1540 740 1140 3240 3040 3040 2340 3 K8AK-TH Connections Wiring Diagrams K8AK-TH11S K8AK-TH12S Power supply voltage*1 Power supply voltage*1 Not used. A1 Relay output Not used. A2 Power supply 14 11 12 Relay output Power supply A1 A2 14 11 12 *1 The input power supply depends on the model: 100 to 240 VAC or 24 VAC/VDC (no polarity) External input (LATCH_RST)*2 Sensor input 4 5 6 1 2 3 + Thermocouple B Sensor input − B A + Timing Charts Temperature Alarm: Hysteresis: 2°C/°F Temperature setting 2°C (°F) 2°C (°F) Temperature alarm upper limit (11) to (14) Temperature alarm lower limit (11) to (14) Changing between Normally Open and Normally Closed Power supply Temperature alarm or other error Relay output (normally open) (11) to (14) Relay output (normally closed) (11) to (14) * Other errors: sensor open circuit error, sensor input error, temperature setting error, and memory error. Latched Operation: Relay outputs remain latched even after the alarm or error is reset. Power supply Temperature alarm or other error LATCH_RST or external inputs (4) to (5) Relay output (latched) (11) to (14) 0.02 s * If LATCH_RST is enabled, the alarm status is retained even if the power supply is cycled. To clear the alarm status, press the LATCH_RST button or turn ON the external input. (Default: Latching enabled.) Operation of Indicators Power supply SV Protect Mode Flashing PWR indicator Power supply Temperature alarm Other error 4 4 5 6 Not used. 1 2 3 Not used. − Thermocouple Pt resistance thermometer input ALM indicator *2 External input (LATCH_RST)*2 Not used. Flashing Wiring of the external input terminals is as shown below. K8AK-TH Nomenclature Front Operations ●Error (ALM indicator: Flashing) Power supply Relay output R_SW3 Temperature unit (Black out the unnecessary label: °C or °F) PWR Indicator (Green) R_SW2 ALM indicator (Red) R_SW1 LATCH_RST button* External input (LATCH_RST) Sensor input One of the following items 1 to 3 has occurred. 1. The sensor circuit is disconnected or the temperature setting is out of the specified range. 2. The temperature setting is out of the specified range. 3. There is a problem in the internal circuits. Corrections 1. Disable SV Protect Mode. 2. Disable the latch. 3. Check for incorrect wiring, circuit disconnections, short circuits, and whether the input type and temperature settings are correct. 4. If the wiring and settings are correct, reset the power supply. If the Unit resumes normal operation, the problem may have been caused by noise. If the Unit does not resume normal operation, it must be replaced. * The non-volatile memory stores the event when a latched output is disabled, or the SV Protect Mode is enabled or disabled. An error may occur if the data is updated more than one million times. * If you press and hold the LATCH_RST button for 5 seconds or longer, the SV Protect Mode will go into effect. When SV Protect Mode is enabled, the PWR indicator flashes. To disable the SV Protect Mode, press and hold the LATCH_RST Button for at least 5 seconds. ●Alarm Setting Rotary Switch Point the arrow to the required number. Note: 1. Use solid-core wires of 2.5-mm2 max. or ferrules with an insulation sleeve to wire to this terminal. To ensure the dielectric strength of the connection, do not expose more than 8 mm of wire for insertion into the terminal. For a solid wire of 2.5-mm2 of max. For ferrules with an insulation sleeve. 8 mm max. 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-TH Operation Method Function Selection DIP Switch Settings K8AK-TH11S R_SW3 100°C/°F units (0 to 9) R_SW2 10°C/°F units (0 to 9) R_SW1 1°C/°F units (0 to 9) K8AK-TH12S occurs if this switch is set to a value from 4 to 9. * Default: 0°C SW 1 2 3 4 Switch (SW) ON OFF * Default settings: All OFF Turn OFF the power to the Temperature Monitoring Relay before you change the switch settings on the side panel. The switch settings made on the side panel take effect when the power is turned ON. Use a precision screwdriver to manipulate the switches and button. R_SW2 100°C/°F units (0 to 9) R_SW1 10°C/°F units (0 to 9) * Default: 0°C 5 6 7 Upper limit alarm Input type Lower limit alarm K With latching J Without latching T Normally open E ON Pt100 OFF Normally closed 1,000°C/°F units (0 to 3) R_SW3 * A temperature setting error SW 1 2 3 4 5 6 7 Upper limit alarm Input type Lower limit alarm K With latching J Without latching T °C Pt1000 Normally open E ON °F Not used. Normally closed B OFF Not used. °C R * Default: All OFF. * SW8: Not used. S °F PLII * Default: All OFF. * SW8: Not used. Safety standards EN 61010-1 EMC 6 EMI EN 61326-1 EMS EN 61326-1 K8AK-TH Functions ●SV Protection This function protects (i.e., prohibits changing) the alarm setting, operating method, and modes for the Temperature Monitoring Relay that have been set on the rotary switches and DIP switch. The protection function is activated by pressing the output latch reset button on the Temperature Monitoring Relay for at least 5 s or by turning ON the input to the external input terminal for at least 5 s. The power indicator will flash when the protection is activated. The protection function can be released by pressing the output latch reset button on the Temperature Monitoring Relay for at least 5 s or by turning ON the input to the external input terminal for at least 5 s. The power indicator will light while the protection is being reset. Dimensions (Unit: mm) Note: All units are in millimeters unless otherwise indicated. Temperature Monitoring Relay K8AK-TH 22.5 100 90 5 Track Mounting Products (Sold Separately) ●DIN Tracks PFP-100N PFP-50N 7.3±0.15 4.5 35±0.3 15 25 10 25 25 1000 (500) (See note.) 10 25 15 (5) (See note.) 27±0.15 1 * Dimensions in parentheses are for the PFP-50N. 7 K8AK-TH 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 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 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 to warn of the risk of electric shock under specific conditions. 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 for general prohibitions for which there is no specific symbol. Loose screws may cause fires. Tighten terminal screws to the specified torque of 0.49 to 0.59 N·m. Used to indicate prohibition when there is a risk of minor injury from electrical shock or other source if the product is disassembled. 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. If the setting does not match the element to be monitored, the product may behave unexpectedly and damage the machine or cause accidents. Set the Temperature Monitoring Relay as described below. • Adjust each set value on the Temperature Monitoring Relay correctly for the element that is to be monitored. • Turn OFF the power to the Temperature Monitoring Relay before you change the switch settings on the side panel. The switch settings made on the side panel take effect when the power is turned ON. If the Temperature Monitoring Relay fails, monitoring and alarm outputs may fail to operate. This may result in physical damage to the facilities, equipment, or other devices that are connected to it. To reduce this risk, inspect the product regularly. To make the product fail-safe, take alternative safety measures, such as the installation of monitoring devices on a separate circuit. 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. 8 K8AK-TH Precautions for Safe Use 1. Do not use or store the product in the following locations. • Locations subject to water or oil • Locations subject to direct radiant heat from heating equipment • 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 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 type of the thermocouple matches the input type that the Temperature Monitoring Relay is designed for. 8. If you need to extend the length of the lead wires on the thermocouple, make sure to match the type of thermocouple and always use compensating conductors. 9. To extend the lead wires on the platinum resistance thermometer, use lead wires with a low resistance (5 Ω or less per wire), and make the resistance equal on all three lead wires. 10.Make sure the crimp terminals for wiring are of the specified size. 11.Do not connect anything to terminals that are not being used. 12.Use a power supply that will reach the rated voltage within 1 second after the power is turned ON. 13.After you turn ON the power, it takes 2 seconds for the outputs of the Temperature Monitoring Relay to stabilize. Take this time into account when you design the control panel. 14.Allow at least 30 minutes for the product to warm up. During this time, the temperature measurements will be incorrect. 15.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. 16.Do not install the product near equipment that generates high frequencies or surges. 17.The product may cause incoming radio wave interference. Do not use the product near radio wave receivers. 18.Install an external switch or circuit breaker and label it clearly so that the operator can quickly turn OFF the power supply. 19.When cleaning the product, do not use thinners or solvents. Use commercial alcohol. 20.When discarding the product, properly dispose of it as industrial waste. 21.Make sure the power and output indicators operate correctly. Depending on the application environment, the indicators and other plastic parts may wear prematurely and become difficult to see. Check and replace these parts regularly. 22.The terminal blocks may heat up to 65°C. Use care when handling them. 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 rotary switches. Correct Mounting Direction, Mounting, and Removing • Mounting to DIN Track 1. Attach the product to the DIN Track with the tab at the top and the hooks at the bottom. 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) 9 MEMO 10 Terms and Conditions Agreement Read and understand this catalog. Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments. Warranties. (a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron disclaims all other warranties, express or implied. (b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the Products or otherwise of any intellectual property right. (c) Buyer Remedy. Omron’s sole obligation hereunder shall be, at Omron’s election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty, repair, indemnity or any other claims or expenses regarding the Products unless Omron’s analysis confirms that the Products were properly handled, stored, installed and maintained and not subject to contamination, abuse, misuse or inappropriate modification. Return of any Products by Buyer must be approved in writing by Omron before shipment. Omron Companies shall not be liable for the suitability or unsuitability or the results from the use of Products in combination with any electrical or electronic components, circuits, system assemblies or any other materials or substances or environments. Any advice, recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above warranty. See http://www.omron.com/global/ or contact your Omron representative for published information. Limitation on Liability; Etc. OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY. Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted. Suitability of Use. 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. 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 ADDRESS THE RISKS, AND THAT THE OMRON PRODUCT(S) 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. Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is assumed for clerical, typographical or proofreading errors or omissions. OMRON Corporation Industrial Automation Company Authorized Distributor: Tokyo, JAPAN Contact: www.ia.omron.com Regional Headquarters OMRON EUROPE B.V. Wegalaan 67-69-2132 JD Hoofddorp The Netherlands Tel: (31)2356-81-300/Fax: (31)2356-81-388 OMRON ELECTRONICS LLC One Commerce Drive Schaumburg, IL 60173-5302 U.S.A. Tel: (1) 847-843-7900/Fax: (1) 847-843-7787 OMRON ASIA PACIFIC PTE. LTD. No. 438A Alexandra Road # 05-05/08 (Lobby 2), Alexandra Technopark, Singapore 119967 Tel: (65) 6835-3011/Fax: (65) 6835-2711 OMRON (CHINA) CO., LTD. Room 2211, Bank of China Tower, 200 Yin Cheng Zhong Road, PuDong New Area, Shanghai, 200120, China Tel: (86) 21-5037-2222/Fax: (86) 21-5037-2200 © OMRON Corporation 2014 All Rights Reserved. In the interest of product improvement, specifications are subject to change without notice. CSM_4_1_0715 Cat. No. N187-E1-01 0513 0314 (0314)