2. To prevent fire, note the following (2) Wiring CAUTION General-Purpose AC Servo CAUTION Install the servo amplifier and servo motor on incombustible material. Installing them directly or close to combustibles will lead to a fire. Always connect a circuit protector between the main circuit power supply and power input connector (CNP1) of the servo amplifier, and configure the wiring to be able to shut down the power supply on the side of the servo amplifier’s power supply. If a circuit protector is not connected, continuous flow of a large current may cause a fire when the servo amplifier malfunctions. Provide adequate protection to prevent screws and other conductive matter, oil and other combustible matter from entering the servo amplifier and servo motor. Always connect a molded-case circuit breaker to the power supply of the servo amplifier. J2-Jr Series MR-J2-03A5 MR-J2-03B5 MR-J2-03C5 Instructions and Cautions for Safe Use of AC Servos If this is the first time for you to use the MELSERVO-J2-Jr Series, the optionally available MR-J2-03 5 Servo Amplifier Instruction Manual and MELSERVO Servo Motor Instruction Manual are required. Always purchase them and use the MR-J2-Jr Series safely. F CAUTION Only the voltage specified in the Instruction Manual should be applied to each terminal. Otherwise, a burst, damage, etc. may occur. Connect the terminals correctly to prevent a burst, damage, etc. Ensure that polarity ( , ) is correct. Otherwise, a burst, damage, etc. may occur. During power-on or for some time after power-off, do not touch or close a parts (cable etc.) to the servo motor. Their temperatures may be high and you may get burnt or a parts may damaged. During operation, never touch the rotating parts of the servo motor. Doing so can cause injury. Tel/Fax USA Mitsubishi Electric Automation Inc. 500 Corporate Woods Parkway, Vernon Hills, IL 60061, USA Tel :+1-847-478-2100 Fax :+1-847-478-0327 Germany Mitsubishi Electric Europe B.V. German Branch Gothaer Strasse 8, D-40880 Ratingen, Germany Tel :+49-2102-486-0 Fax :+49-2102-486-1120 Mitsubishi Electric Europe B.V. Italian Branch Viale Colleoni 7 1-20041 Agrate Brianza (Milano), Italy Tel :+39-39-60531 Fax :+39-39-6053312 4. Additional instructions China Mitsubishi Electric Automation (China) Ltd. 4F Zhi Fu Plazz, No. 80 Xin Chang Road Shanghai 200003, China Tel :+86-21-6120-0808 Fax :+86-21-6121-2444 The following instructions should also be fully noted. Incorrect handling may cause a fault, injury, electric shock, etc. Taiwan Setsuyo Enterprise Co., Ltd. 6F, No.105 Wu-Kung 3rd Rd, Wu-Ku Hsiang, Taipei Hsine, Taiwan Tel :+886-2-2299-2499 Fax :+886-2-2299-2509 Korea Mitsubishi Electric Automation Korea Co., Ltd. 3F, 1480-6, Gayang-dong, Gangseo-gu, Seoul 157-200, Korea Tel :+82-2-3660-9552 Fax :+82-2-3664-8372 Singapore Mitsubishi Electric Asia Pte, Ltd. 307 Alexandra Road #05-01/02, Mitsubishi Electric Building Singapore 159943 Tel :+65-6470-2460 Fax :+65-6476-7439 IB(NA)67426-F(1306)MEE This guide uses recycled paper. Specifications are subject to change without notice. Printed in Japan Safety Instructions Indicates that incorrect handling may cause hazardous conditions, resulting in death or severe injury. Transport the products correctly according to their mass. Stacking in excess of the specified number of products is not allowed. Do not carry the servo motor by the cables, shaft or encoder. Do not hold the front cover to transport the servo amplifier. The servo amplifier may drop. Install the servo amplifier in a load-bearing place in accordance with the Instruction Manual. Do not climb or stand on servo equipment. Do not put heavy objects on equipment. The controller and servo motor must be installed in the specified direction. Leave specified clearances between the servo amplifier and control enclosure walls or other equipment. Do not install or operate the servo amplifier and servo motor which has been damaged or has any parts missing. Do not block intake and exhaust areas of the servo amplifier. Doing so may cause faults. Do not drop or strike servo amplifier or servo motor. Isolate from all impact loads. Use the servo amplifier and servo motor under the following environmental conditions. Item Ambient temperature Ambient humidity Operation Storage [ [ [ [ ] ] ] ] Operation Storage Altitude (Note) Vibration CAUTION Indicates that incorrect handling may cause hazardous conditions, resulting in medium or slight injury to personnel or may cause physical damage. Note that the CAUTION level may lead to a serious consequence according to conditions. Please follow the instructions of both levels because they are important to personnel safety. What must not be done and what must be done are indicated by the following diagrammatic symbols. : Indicates what must not be done. For example, "No Fire" is indicated by : Indicates what must be done. For example, grounding is indicated by . . In this guide, instructions at a lower level than the above, instructions for other functions, and so on are classified into "POINT". After reading this guide, always keep it accessible to the operator. 1. To prevent electric shock, note the following WARNING Before wiring or inspection, switch power off and wait for more than 15 minutes. Then, confirm the voltage is safe with voltage tester. Otherwise, you may get an electric shock. Connect the servo amplifier and servo motor to ground. Any person who is involved in wiring and inspection should be fully competent to do the work. Do not attempt to wire the servo amplifier and servo motor until they have been installed. Otherwise, you may get an electric shock. Operate the switches with dry hand to prevent an electric shock. The cables should not be damaged, stressed loaded, or pinched. Otherwise, you may get an electric shock. To avoid an electric shock, insulate the connections of the power supply terminals. V Servo amplifier V U U V V M W Servo motor M W W Do not connect AC power directly to the servo motor. Otherwise, a fault may occur. The surge absorbing diode installed to the DC relay for control output should be fitted in the specified direction. Otherwise, the emergency stop and other protective circuits may not operate. Servo amplifier COM (24VDC) Control output signal Control output signal RA [m/s2] [ft/s2] Environment Servo amplifier Servo motor 0 to 55 (non-freezing) 0 to 40 (non-freezing) 32 to 131 (non-freezing) 32 to 104 (non-freezing) 20 to 65 (non-freezing) 15 to 70 (non-freezing) 4 to 149 (non- freezing) 5 to 158 (non-freezing) 90 RH or less 80 RH or less (non-condensing) (non-condensing) 90%RH or less (non-condensing) Indoors (no direct sunlight) Free from corrosive gas, flammable gas, oil mist, dust and dirt Max. 1000m (3280 ft) above sea level HC-AQ 5.9 or less X Y : 19.6 Series 19.4 or less HC-AQ Series X Y : 64 n DISPOSAL OF WASTE n Please dispose a servo amplifier, battery (primary battery) and other options according to your local laws and regulations. SOUTH KOREA COMPLIANCE This product complies with the Radio Wave Law (KC mark). Please note the following to use the product. 이 기기는 업무용 (A급) 전자파적합기기로서 판 매자 또는 사용자는 이 점을 주의하시기 바라며， 가정외의 지역에서 사용하는 것을 목적으 로 합니다. (The product is for business use (Class A) and meets the electromagnetic compatibility requirements. The seller and the user must note the above point, and use the product in a place except for home.) 1.1 Introduction to the manuals RA If this is the first time for you to use the MELSERVO-J2-Jr series, the manuals of the following numbers are required. Always purchase them and use the MELSERVO-J2-Jr series safely. Manual Model CAUTION MR-J2-03A5 MR-J2-03B5 MR-J2-03C5 Servo Amplifier Instruction Manual Servo Motor Instruction Manual EMC Guidelines SH(NA)3200 SH(NA)030005 SH(NA)3209 SH(NA)3181 (Ver-D or later) IB(NA)67310 1.2 Contents of the packing After unpacking, check the rating plate to confirm that the servo amplifier you received are as you ordered. (4) Usage CAUTION Provide an external emergency stop circuit to ensure that operation can be stopped and power switched off immediately. Any person who is involved in disassembly and repair should be fully competent to do the work. Before resetting an alarm, make sure that the run signal is off to prevent an accident. A sudden restart is made if an alarm is reset with the run signal on. Do not modify the equipment. Use a noise filter, etc. to minimize the influence of electromagnetic interference, which may be caused by electronic equipment used near the servo amplifier. Use the servo amplifier with the specified servo motor. The electromagnetic brake on the servo motor is designed to hold the motor shaft and should not be used for ordinary braking. For such reasons as service life and mechanical structure (e.g. where a ball screw and the servo motor are coupled via a timing belt), the electromagnetic brake may not hold the motor shaft. To ensure safety, install a stopper on the machine side. Contents CAUTION When it is assumed that a hazardous condition may take place at the occur due to a power failure or a product fault, use a servo motor with electromagnetic brake or an external brake mechanism for the purpose of prevention. Configure a circuit so that the electromagnetic brake activates with the external emergency stop switch at the same time. Circuit must be opened during emergency stop switch. Servo amplifier Servo motor CNP2 When any alarm has occurred, eliminate its cause, ensure safety, and deactivate the alarm before restarting operation. When power is restored after an instantaneous power failure, keep away from the machine because the machine may be restarted suddenly (design the machine so that it is secured against hazard if restarted). (6) Maintenance, inspection and parts replacement CAUTION With age, the electrolytic capacitor will deteriorate. To prevent a secondary accident due to a fault, it is recommended to replace the electrolytic capacitor every 10 years when used in general environment. Please contact your local sales office. Quantity Servo Amplifier Earth (E) terminal AERSBAN-JR M4 screw MELSERVO-J2-Jr Series Instructions and Cautions for Safe Use of AC Servos (This guide) CNP1 connector 5557-08R (Molex make) CNP1 terminal 5556 (Molex make) 1 1 3 1 1 10 1.3 Model code definition (1) Rating plate The year and month of manufacture Model Capacity Applicable power supply Rated output current Serial number KC certification number Country of origin (5) Corrective actions Note. Except the servo motor with reduction gear. Securely attach the servo motor to the machine. If attach insecurely, the servo motor may come off during operation. The servo motor with reduction gear must be installed in the specified direction to prevent oil leakage. For safety of personnel, always cover rotating and moving parts. Never hit the servo motor or shaft, especially when coupling the servo motor to the machine. The encoder may become faulty. Do not subject the servo motor shaft to more than the permissible load. Otherwise, the shaft may break. When the equipment has been stored for an extended period of time, contact your local sales office. When treating the servo amplifier, be careful about the edged parts such as the corners of the servo amplifier. The servo amplifier must be installed in the metal cabinet (control box). When fumigants that contain halogen materials such as fluorine, chlorine, bromine, and iodine are used for disinfecting and protecting wooden packaging from insects, they cause malfunction when entering our products. Please take necessary precautions to ensure that remaining materials from fumigant do not enter our products, or treat packaging with methods other than fumigation (heat method). Additionally, disinfect and protect wood from insects before packing products. To illustrate details, the equipment in the diagrams of this guide and instruction manual may have been drawn without covers and safety guards. When the equipment is operated, the covers and safety guards must be installed as specified. Operation must be performed in accordance with this guide and Instruction Manual. 1 INTRODUCTION Servo amplifier COM (24VDC) Before operation, check the parameter settings. Improper settings may cause some machines to perform unexpected operation. The parameter settings must not be changed excessively. Operation will be instable. CAUTION Ambience WARNING U Servo motor U (3) Test run adjustment (1) Transportation and installation (Please read the instructions carefully before using the equipment.) Install, and peruse all this guide and attached documents before the drive and maintenance and the check. After that, use these correctly. Use it after it is skilled of the knowledge of the equipment, information on safety, and all of notes. In this guide, the safety instruction levels are classified into "WARNING" and "CAUTION". Servo amplifier 3. To prevent injury, note the following Sales office HEAD OFFICE: TOKYO BLDG MARUNOUCHI TOKYO 100-8310 Wire the equipment correctly and securely. Otherwise, the servo motor may operate unexpectedly. Do not install a power capacitor, surge killer or radio noise filter between the servo motor and servo amplifier. Connect the wires to the correct phase terminals (U, V, W) of the servo amplifier and servo motor. Otherwise, the servo motor does not operate properly. Connect the servo motor power terminal (U, V, W) to the servo motor power input terminal (U, V, W) directly. Do not let a magnetic contactor, etc. intervene. W Country/Region Italy (7) General instruction (2) Model Series name Rated output 30[W] HC-AQ0135 Applicable Servo Motor HC-AQ0235 HC-AQ0335 Corresponding Symbol Corresponding General-purpose interface A SSCNET (Note) B Positioning functions built-in C Note. BH is also available for particular customers. Software special specification Blank, Sn, or Un (n=00 to 999) Hardware special specification Blank or 2 to 5 digit alphanumeric (RJ, ED, PX, RU, RZ, etc.) 24VDC power supply specification 1.4 Connection of CNP1 connector (packed with the servo amplifier) (b) The sizes of the cables described in the MELSERVO-J2-Jr Series Servo Amplifier Instruction Manual meet the following requirements. To meet the other requirements, follow Table 5 and Appendix C in EN 60204-1. (1) Signal arrangement CNP1 1 5 RDP P24M MELSERVO OPEN CN1A 6 Ambient temperature: 40 (104) [ ( )] Sheath : PVC (polyvinyl chloride) Installed on wall surface or open cable tray MITSUBISHI CN1B 2 RDN P24G 7 3 SDP P24L 8 CNP1 CNP2 4 SDN TRE CNP3 (2) Connection diagram (Note 1) RS-422 communication This servo amplifier complies with UL 508C and CSA C22.2 No.14 standard. Refer to section 1.3 (2) for the servo amplifier model names described in the tables and figures. The standard models of the servo amplifier and servo motor comply with the UL/cUL standard. When using 24VDC power supply, options and auxiliary equipment, use those which conform to the UL/cUL standard. (Note 2) 87 6 5 4 3 2 1 CNP1 87 6 5 4 3 2 1 CNP1 Axis 1 servo amplifier Last axis servo amplifier Note: 1. Cannot be used with the MR-J2-03B5. 2. Connect when the servo amplifier is the last axis. (1) Selection example of wires To comply with the UL/cUL Standard, use UL-approved copper wires rated at 60/75 (140/167 ) for wiring. 2. COMPLIANCE WITH CE MARKING 2.1 What is CE marking? The CE marking is mandatory and must be affixed to specific products placed on the European Union. When a product conforms to the requirements, the CE marking must be affixed to the product. The CE marking also applies to machines and equipment incorporating servos. When you need a copy of Declaration of Conformity of CE marking, contact your local sales office. EMC directive The EMC directive applies to the servo units alone. This servo is designed to comply with the EMC directive. The EMC directive also applies the servo-incorporated machines and equipment. This requires the EMC filters to be used with the servo-incorporated machines and equipment to comply with the EMC directive. For specific EMC directive conforming methods, refer to the EMC Installation Guidelines (IB(NA)67310). 2.2 Precautions for compliance Be sure to perform an appearance inspection of every unit before installation. In addition, have a final performance inspection on the entire machine/system, and keep the inspection record. The standard models of the servo amplifier and servo motor comply with the EN standard. (1) Structure Control box Reinforced insulation type 24VDC power supply Servo motor Circuit protector Servo amplifier SM (2) Environment Operate the servo amplifier at pollution degree 2 or 1 set forth in EN 60664-1. For this purpose, install the servo amplifier in a control box which is protected against water, oil, carbon, dust, dirt, etc. (IP54). (3) Power supply Use a 24VDC power supply which has been insulation-reinforced in I/O. (4) Grounding To prevent an electric shock, fit the supplied earth terminal (E) to the servo amplifier and always connect it to the earth (E) of the control box. (5) Auxiliary equipment and options (a) Use the following circuit protector. Servo amplifier Circuit protector MR-J2-03C5 CP-30BA 1P 1-M5A Note. Use the operation characteristic of "mid-speed type". 2 Wires [mm ] Servo Amplifier P24M P24G P24L MR-J2-03 5 Crimping terminal Applicable tool Manufacturer name 5556 57026-5000(for UL1007)/ 57027-5000(for UL1015) Molex AWG18 or AWG20 (2) Terminal block tightening torque Servo amplifier MR-J2-03 Tightening torque [N m] ([lb in]) PE 5 1.2 (10.6) (3) Overload protection characteristics An electronic thermal relay is built in the servo amplifier to protect the servo motor, servo amplifier and servo motor power line from overloads. The operation characteristics of the electronic thermal relay are shown below. It is recommended to use an unbalanced torque-generated machine, such as a vertical motion shaft, so that unbalanced torque is not more than 70 of the rated torque. Servo amplifier MR-J2-Jr series have servo motor overload protection. (The motor full load current is 115 rated current.) HC-AQ Series 1000 Do not perform insulation resistance test on the servo amplifier as damage may result. Do not disassemble and/or repair the equipment on customer side. CAUTION (b) Check the cables and the like for scratches and cracks. Perform periodic inspection according to operating conditions. (c) Check the servo motor shaft and coupling for misalignment. The following parts must be changed periodically as listed below. If any part is found faulty, it must be changed immediately even when it has not yet reached the end of its life, which depends on the operating method and envirdonmental conditions. Servo motor Part name Life guideline Smoothing capacitor 10 years Number of power-on and number of emergency stop times: 100,000 times 20,000 to 30,000 hours 20,000 to 30,000 hours Relay Bearings Encoder (a) Smoothing capacitor Affected by ripple currents, etc. and deteriorates in characteristic. The life of the capacitor greatly depends on ambient temperature and operating conditions. The capacitor will reach the end of its life in 10 years of continuous operation in normal air-conditioned environment (surrounding air temperature of 40 (104 ) or less). (b) Relays Their contacts will wear due to switching currents and contact faults occur. Relays reach the end of their life when the cumulative number of power-on and emergency stop times is 100,000, which depends on the power supply capacity. (c) Servo motor Bearings When the servo motor is run at rated speed under rated load, change the bearings in 20,000 to 30,000 hours as a guideline. This differs on the operating conditions. The bearings must also be changed if unusual noise or vibration is found during inspection. CAUTION 1 0.1 0 Indication 50 100 150 200 250 300 Load ratio [%] (4) Over-temperature protection for motor Motor Over temperature sensing is not provided by the drive. (5) About wiring protection For installation in United States, branch circuit protection must be provided, in accordance with the National Electrical Code and any applicable local codes. For installation in Canada, branch circuit protection must be provided, in accordance with the Canada Electrical Code and any applicable provincial codes. (6) Installation The MR-J2-Jr series have been approved as the products which have been installed in the electrical enclosure. The minimum enclosure size is based on 150 of each MR-J3 combination. And also, design the enclosure so that the ambient temperature in the enclosure is 55˚C (131˚F ) or less. The servo amplifier must be installed in the metal cabinet (control box). For environment, the units should be used in open type (UL 50). The converter unit and servo amplifier (drive unit) need to be installed at or below of pollution degree 2. For connection, use copper wires. (7) Short-circuit current rating (SCCR) Suitable For Use On A Circuit Capable Of Delivering Not More Than 100 kA rms Symmetrical Amperes, 500 Volts Maximum. (8) Capacitor discharge time To ensure safety, do not touch the charging section for 15 minutes after power-off. 10 Name 11 Board error1 12 Memory error1 Indication 24 31 Name Motor output ground Indication 37 Name Parameter error fault 50 Overload1 Overspeed 51 Overload2 13 Clock error 32 Overcurrent 52 Error excessive 15 Memory error2 33 Overvoltage 61 Operation alarm 16 Encoder error1 34 CRC error 17 Board error2 18 Board error3 20 Encoder error2 35 36 Command pulse frequency error Transfer error 8A 8E 88 Serial communication time-out Serial communication error Watchdog 5.2 Warnings Indication 90 96 98 Name Home position incomplete warning Home position setting warning Software limit warning Indication E1 E4 E6 (3) Even during the term of warranty, the repair cost will be charged on you in the following cases; (i) : a failure caused by your improper storing or handling, carelessness or negligence, etc., and a failure caused by your hardware or software problem (ii) : a failure caused by any alteration, etc. to the Product made on your side without our approval (iii) : a failure which may be regarded as avoidable, if your equipment in which the Product is incorporated is equipped with a safety device required by applicable laws and has any function or structure considered to be indispensable according to a common sense in the industry (iv) : a failure which may be regarded as avoidable if consumable parts designated in the instruction manual, etc. are duly maintained and replaced (v) : any replacement of consumable parts (battery, fan, smoothing capacitor, etc.) (vi) : a failure caused by external factors such as inevitable accidents, including without limitation fire and abnormal fluctuation of voltage, and acts of God, including without limitation earthquake, lightning and natural disasters (vii) : a failure generated by an unforeseeable cause with a scientific technology that was not available at the time of the shipment of the Product from our company (viii) : any other failures which we are not responsible for or which you acknowledge we are not responsible for 2. Term of warranty after the stop of production (1) We may accept the repair at charge for another seven (7) years after the production of the product is discontinued. The announcement of the stop of production for each model can be seen in our Sales and Service, etc. (2) Please note that the Product (including its spare parts) cannot be ordered after its stop of production. 3. Service in overseas countries Our regional FA Center in overseas countries will accept the repair work of the Product. However, the terms and conditions of the repair work may differ depending on each FA Center. Please ask your local FA center for details. 4. Exclusion of responsibility for compensation against loss of opportunity, secondary loss, etc. Whether under or after the term of warranty, we assume no responsibility for any damages arisen from causes for which we are not responsible, any losses of opportunity and/or profit incurred by you due to a failure of the Product, any damages, secondary damages or compensation for accidents arisen under a specific circumstance that are foreseen or unforeseen by our company, any damages to products other than the Product, and also compensation for any replacement work, readjustment, start-up test run of local machines and the Product and any other operations conducted by you. 5. Change of Product specifications Specifications listed in our catalogs, manuals or technical documents may be changed without notice. (1) For the use of our General-Purpose AC Servo, its applications should be those that may not result in a serious damage even if any failure or malfunction occurs in General-Purpose AC Servo, and a backup or fail-safe function should operate on an external system to General-Purpose AC Servo when any failure or malfunction occurs. When any alarm has occurred, eliminate its cause, ensure safety, then reset the alarm, and restart operation. Otherwise, injury may occur. Undervoltage (1) You are requested to conduct an initial failure diagnosis by yourself, as a general rule. It can also be carried out by us or our service company upon your request and the actual cost will be charged. However, it will not be charged if we are responsible for the cause of the failure. 6. Application and use of the Product 5.1 Alarms During stop [Limitations] (2) This limited warranty applies only when the condition, method, environment, etc. of use are in compliance with the terms and conditions and instructions that are set forth in the instruction manual and user manual for the Product and the caution label affixed to the Product. (2) Life Servo amplifier We will repair any failure or defect hereinafter referred to as "failure" in our FA equipment hereinafter referred to as the "Product" arisen during warranty period at no charge due to causes for which we are responsible through the distributor from which you purchased the Product or our service provider. However, we will charge the actual cost of dispatching our engineer for an on-site repair work on request by customer in Japan or overseas countries. We are not responsible for any on-site readjustment and/or trial run that may be required after a defective unit are repaired or replaced. The term of warranty for Product is twelve (12) months after your purchase or delivery of the Product to a place designated by you or eighteen (18) months from the date of manufacture whichever comes first (“Warranty Period”). Warranty period for repaired Product cannot exceed beyond the original warranty period before any repair work. 5. ALARMS AND WARNINGS 10 Warranty [Term] (1) Inspection It is recommended to make the following checks periodically. During rotation 100 The number of write times to the EEP-ROM, which stores parameter settings, etc., is limited to 100,000. If the total number of the following operations exceeds 100,000, the servo amplifier may fail when the EEP-ROM reaches the end of its useful life. Writing to the EEP-ROM due to parameter setting changes. Home position setting in the absolute position detection system. 1. Warranty period and coverage (a) Check the servo motor bearings, brake section, etc. for unusual noise. 3 CONFORMANCE WITH UL/cUL STANDARD + - Operation time [s] 24VDC power supply Before starting maintenance and/or inspection, make sure that the charge lamp is off more than 15 minutes after power-off. Then, confirm that the voltage is safe in the tester or the like. Otherwise, you may get an electric shock. Any person who is involved in inspection should be fully competent to do the work. Otherwise, you may get an electric shock. For repair and parts replacement, contact your safes representative. WARNING (6) Performing EMC tests When EMC tests are run on a machine/device into which the servo amplifier has been installed, it must conform to the electromagnetic compatibility (immunity/emission) standards after it has satisfied the operating environment/electrical equipment specifications. For the other EMC directive guidelines on the servo amplifier, refer to the "EMC Installation Guidelines". - MR-J2-Jr Series are not intended to be used on a low-voltage public network which supplies domestic premises; - radio frequency interference is expected if used on such a network. The installer shall provide a guide for Installation and use, including recommended mitigation devices. EEP-ROM life 4 INSPECTION Name Overload warning Parameter warning Servo forced stop warning Indication E7 E9 Name Controller emergency stop warning Main circuit off warning (2) Our General-Purpose AC Servo is designed and manufactured as a general purpose product for use at general industries. Therefore, applications substantially influential on the public interest for such as atomic power plants and other power plants of electric power companies, and also which require a special quality assurance system, including applications for railway companies and government or public offices are not recommended, and we assume no responsibility for any failure caused by these applications when used. In addition, applications which may be substantially influential to human lives or properties for such as airlines, medical treatments, railway service, incineration and fuel systems, man-operated material handling equipment, entertainment machines, safety machines, etc. are not recommended, and we assume no responsibility for any failure caused by these applications when used. We will review the acceptability of the abovementioned applications, if you agree not to require a specific quality for a specific application. Please contact us for consultation.