precautions while using power supply

Safety precautions
 1. Read the Users Guide and other accompanying documents carefully before handling the motor, installing it in a device or operating it in order to ensure correct usage. Make sure that you have fully familiarized yourself with all the information about the motor, including safety information and precautions before using the motor. The following warnings and cautions are provided in order to ensure safe and correct usage of this product as well as to .....
Grounding
 2. Connect the ground completely. Electric shock may occur if the ground is not connected completely. .....
Operating environment
 3. Use each Product within the rated range for ambient operating temperature, ambient operating humidity, and storage temperature specified for that Product.Use the Power Supply within the ranges specified for vibration and shock resistance.Do not use the Power Supply in locations subject to excessive amount of dust or where liquids, foreign matter, or corrosive gases may enter the interior of the Product.Install the Power Supply well away from devi .....
Mounting
 4. The installation screws can be tightened into the Power Supply only to a limited depth. Make sure that the lengths of the screws protruding into the Power Supply are within the specified dimensions.Refer to the dimensional diagrams for each model for specific dimensions. .....
Wiring
 5. Use caution when connecting the input cable to the Power Supply. The Power Supply Unit may be destroyed if the input cable is connected to the wrong terminals. Use caution when using a model with a DC input. The Power Supply Unit may be destroyed if the polarity is reversed. .....
Wiring materials
 6. Use a wire size that suits the rated output current of the Power Supply to be used in order to prevent smoking or ignition caused by abnormal loads.Caution is particularly required if the output current from one Power Supply is distributed to multiple loads.If thin wiring is used to branch wiring, the Power Supplys overload protection circuit may fail to operate depending on factors such as the impedance of the load wiring even when the load is s .....
Precautions against Ingress of Metal Fragments
 7. Drilling on the upper section of an installed Power Supply may cause drilling fragments to fall onto the PCB, thereby short circuiting and destroying the internal circuits. Whether the Power Supply cover is attached or not, cover the Power Supply with a sheet to prevent ingress of fragments when performing work on the upper section of the Power Supply.Be sure to remove the sheet covering the Power Supply for machining before power ON so that it d .....
Load
 8. Internal parts may possibly deteriorate or be damaged if a short circuited or overcurrent state continues during operation. .....
Fan equipped Power Supplies
 9. Power Supplies equipped with a fan have forced air cooling. Do not block the ventilation holes on the fan installation surface and the opposite surface. The cooling effect will decrease if the holes are blocked.Always secure the finger guard when replacing the fan. Always turn OFF the input power before replacing the fan. The input power terminals and internal circuits have a high voltage.Do not touch the internal parts when replacing the fan. In .....
Disassembly
 10. Do not disassemble the Power Supply except when replacing the fan. The products original performance may not be maintained. .....
Output and Ground Connections
 11. The Power Supply output is a floating output i.e., the primary side and secondary side are separated , so the output line i.e., +V or V can be connected externally directly to a ground. Through the ground, however, the insulation between the primary side and secondary side will be lost. Confirm that no loops are created in which the Power Supply output is short circuited through the internal circuits of the load. .....
Warning
 12. WARNING indicates a potentially dangerous situation that will cause death or heavy wound unless it is avoided. .....
Caution
 13. CAUTION indicates a potentially dangerous situation that will cause a slight injury or a medium degree injury or property damage unless it is avoided. .....
Warnings for AC Power Supply
 14. If the attached AC power cable does not fit the receptacle, do not alter the AC power cable and do not plug it forcibly. Failure to comply may cause electric shock and/or fire. .....
Connection
 15. The driver is designed for a DC power supply. To prevent fire, be sure to connect the driver using correct polarity.To prevent fire, use the driver within the rated input voltage range.To prevent fire, follow the wiring diagram when connecting the motor and driver. To prevent fire, do not forcefully bend, pull or pinch the cables.To prevent electric shock, when connecting the driver use a direct current power supply with reinforced insulation bet .....
Operation
 16. In the event of a power failure, cut off the drivers power supply. Failure to turn off the power may result in the motor suddenly starting up when the power comes back on, possibly causing personal injury or damage to equipment.Do not use the product for lifting and lowering devices. Movable components may fall, resulting in personal injury or damage to equipment. .....
General
 17. To avoid injury or damage to equipment, do not use the motor and driver beyond their specification values.Do not touch the motor and driver while in operation or immediately after operation has ceased. The surface of the motor and driver is hot and may cause burn injuries. .....
Use the driver power supply correctly
 18. Using the wrong polarity when connecting the DC power supply or using an AC power supply will damage the driver. .....
Do not exceed the input voltage range
 19. The power supplys input voltage range must be 24 VDC ?10%. Do not use a power supply with excessive voltage or high ripple voltage. When using anything other than a commercially produced DC power supply unit consisting of a transformer, diodes and condenser, make sure that the power supply waveform is flat in addition to testing the power supply in order to avoid failure. .....
Do not use the motor for load lowering operations
 20. The 24DCM series motors are not intended for use in operations where the motor output shaft is turned from the load side i.e. load lowering operation . In such operations, motor speed cannot be controlled, and the motors protection function may be activated to automatically stop the motor from running, causing the load to drop. .....
Take noise cancellation measures
 21. The driver controls the motor via pulse width modulation PWM . PWM noise may affect other devices installed in its vicinity. When installing a sensor or microcomputer near the driver power supply, take appropriate noise cancellation measures. .....
Take fail safe measures
 22. While the driver has a built in protection circuit, it can operate only when its clear of faults. Install a fuse on the lead wire connected with the power supply to reduce the risk of failure. .....
Checking the Suitability Of the Equipment
 23. First of all, you need to check whether the electrical equipment is appropriate for the job. Make sure that the construction of the equipment makes it safe enough. Define any safety hazards that there might be and decide which is the best solution for them.It is inappropriate to use electrical equipment in a damp environment. It is a better idea if you use air powered equipment instead, or any other equipment that runs on low voltage transformers .....
Checking the Condition of the Equipment
 24. After you confirm that the electrical equipment is appropriate for the job, you need to check whether its condition is good or not. A simple inspection can be performed by switching off the equipment and checking the plug, wires and the fuse. You must make sure that the plug and cable are working properly. There should be no protruding wires in the cable. In case you find that the cable is damaged, call for someone professional to come and replac .....
Checking the Power of the Equipment
 25. The electrical equipment must be powerful enough to be connected to your power supply. You must also see that the power supply is adjusted to the correct voltage so that it would provide all the electric power that the equipment requires in order to work properly. .....
Checking the Safety Of the Power Supply
 26. Checking that the electrical equipment is safe is not enough. You must also check that the power supply is safe as well. The help of a professional is needed here. The professional must test the power supply on a regular basis to confirm that it is safe enough to be used for electrical equipment.You must never connect electrical equipment to the power supply if it is damaged. Wait until it has been properly repaired by professional people. Testin .....
Making Use Of a Residual Current Device
 27. The residual current device often abbreviated as RCD is a very important tool to enhance safety when using electrical equipment. It reduces the potential risk of being electrocuted. Do not use an RCD to reduce the risk of explosion in an explosive atmosphere. .....
Power supply components
 28. Each J4400 Array contains two hot swappable, redundant power supplies. If one power supply is turned off or malfunctions, the other power supply maintains electrical power. Each power supply contains two internal fans that provide cooling for the J4400 Array components. .....
Removing a Power Supply
 29. 1. Locate the respective disk tray and failed power supply. The Power fault or Fan fault LED is amber. 2. Ensure the power supply on/off switch is in the O position. 3. Disconnect the power cord tie strap from the power cord. 4. Unplug the power cord from the power supply. 5. Using your thumb and forefinger, unscrew both ejection arm captive screws until loose and swing the ejection arms out until they are fully open . .....
Before you begin
 30. Review static electricity, disassembly, and safety considerations. Power down the server tray using one of the three methods detailed below. Put on your electrostatic discharge ESD wrist strap to avoid damaging any circuitry. Remove the server tray from its enclosure and place on a flat, level surface. .....
Pre servicing procedure
 31. Turn off the server and all the peripherals connected to it. Unplug all cables from the power outlets to avoid exposure to high energy levels that may cause burns when parts are short circuited by metal objects such as tools or jewelry. During disassembly, label each cable as you remove it, noting its position and routing. This will make the replacement of the cables much easier, and will ensure that the cables are rerouted properly to protect th .....
Post installation instructions
 32. Observe the following items after removing/replacing a server component Be sure all components are installed according to the described step by step instructions. Check to make sure you have not left loose tools or parts inside the server. Reinstall the PCI riser, peripherals, and system cables that you have removed. Reinstall the server into the chassis. Connect all external cables to the system. Press the power button on the front panel to tur .....
Server warnings and cautions
 33. Before installing a server, be sure that you understand the following warnings and cautions. .....
Always Turn the Power OFF
 34. Any time youre working on an electrical circuit in your home, turn the power off at the circuit breaker to ensure no voltage is flowing through the wires. If for some reason you cannot turn off power to the circuit, you may want to have a licensed electrician do the job if you are nervous about working on live electricity. .....
Ensure Your Tools are Functional
 35. When it comes to working on your homes electricity, a multi tester is going to be your best friend and your go to tool for ensuring safe working conditions. But, before you place your trust in this instrument, you need to make sure it is working properly. Do this by using it to test a circuit that you already know is working, like a receptacle in another room. Since digital multi testers use batteries, performing this test will let you know that .....
Wear the Right Clothing and Gear
 36. Any time youre working on your homes electricity you should be wearing safety glasses if you dont already wear traditional glasses. Debris from drywall or sparks from an accidental short can easily get in your eye if you arent protected. As an extension of this, you should also wear ear protection when youre using power equipment like a reciprocating saw or a power drill.The clothing you wear can also impact the safety conditions of your work sit .....
Notifications are Important
 37. When youre working on your homes electricity, tell everyone in the residence that there may be power outages and to not to worry. You should also place a piece of electrical tape over any breaker s you turn off and tape a note to the electrical panel door as another notice that you are working on the electric. This will help prevent anyone from accidentally turning the circuit on while you are working on it. .....
Never Touch the Service Wires
 38. Inside the electrical panel, there are two types of wires the thick service wires coming in the top or bottom of the panel and the individual circuit wires that get connected to the breakers, neutral bar and grounding bar. Even when you turn the panels main breaker, the service cables remain hot, so you should never work on these cables. .....
Dangerous voltage
 39. Its actually the current that is important rather than the voltage, but due to the resistance of the body you cant get a dangerous current without there being sufficiently high voltage. You can work this out yourself using ohms law, but the important thing as far as this is concerned is to remember the safety principles. Generally you are relatively safe dealing with voltages of less than 50V, but anything above that can be dangerous.You are gene .....
AC vs DC
 40. You may have heard some people say that AC is more dangerous than DC power, or vice versa. Rather than get into too much debate over one vs. the other both AC and DC at high voltages can be lethal. AC is considered to be more likely to cause cardiac arrest by interrupting with the electrical signals controlling the heart, but DC can cause burns and both can still kill so debating the differences is pretty academic. Just remember electricity can k .....
Precautions to be taken before powering the circuit
 41. When connecting the power supply and load to the experimental board, the sequence of the connection to be made is from the load to the power supply, which helps to avoid any floating wire or connector to be charged or shorted to each other. Never let connection wires connected to the power supply or the out put port of the experimental board to be floating. .....
Precautions while switching ON the circuit
 42. Apply low voltages or low power to check proper functionality of circuits. Once functionality is proven, increase voltages or power, stopping at frequent levels to check for proper functioning of circuit or for any components is hot or for any electrical noise that can affect the circuits operation. .....
Precautions while switching off or shutting down the circuit
 43. Reduce the voltage or power slowly till it comes to zero.Switch of all the power supplies and remove the power supply connections.Let the load be connected at the output for some time, so that it helps to discharge capacitor or inductor if any, completely. .....
Precautions while modifying the circuit
 44. Switch off the circuit as per the steps in section 3.5.Modify the connections as per your requirement.Again check the circuit as per steps in section 3.3, and switch ON as per steps in section 3.4. .....
Startup and Maintenance Precautions
 45. Do not touch the terminals while power is on.Doing so could cause electric shock or erroneous operation.Switch all phases of the external power supply off when cleaning the module or retightening the terminal or module mounting screws.Not doing so could result in electric shock or erroneous operation.Do not charge, disassemble, heat, place in fire, short circuit, or solder the battery. Mishandling of battery can cause overheating or cracks which .....
Power precautions
 46. Make sure that the power source circuits are properly grounded, then use the power cord supplied with the device to connect it to the power source.If the installation requires a different power cord than the one supplied with the device, make sure you use a power cord displaying the mark of the safety agency that defines the regulations for power cords in your country. The mark is your assurance that the power cord can be used safely with the dev .....
Ac power supply
 47. Use the following procedures for installing AC power supplies in the ServerIron device. To install an AC power supply, do the following 1. If necessary, remove the power supply locking screw located in the center rear of the device illustrated below . 2. If the empty power supply bay has a cover plate, press inward on the two latches near the left and right edges of the cover plate to unlock the plate illustrated below , then remove the plate. .....
Prepare the Work Area
 48. The surface should be non conductive and non static. When building a system it is important to avoid static electricity, which can damage sensitive electronic components such as those used in a computer. To avoid static build up the person building the system should use a static reducing device such as an antistatic wrist strap. This is normally placed around the wrist and has a lead that attaches to a special plug or is connected to a known eart .....
Esd precautions
 49. Electrostatic discharge ESD is generated by two objects with different electrical charges coming into contact with each other. An electrical discharge is created to neutralize this difference, which can damage electronic components and printed circuit boards. Use a grounded wrist strap designed to prevent static discharge. .....
Testing and Tidying
 50. It is important once you have finished a task to ensure that the result meets the intended purpose and that no unwanted side effects have arisen. For example, if you have installed a sound card you should test that it is fully functional all functions such as midi, joystick, line in, speaker and microphone and that the installation has not affected any other components. It is possible that the installation of a sound card could affect other d .....
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