precautions while using power supply

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.

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.

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 or batteries. Precautions regarding safety should be taken in a more strict way if the workplace has an explosive atmosphere due to the presence of flammable gases and aerosols.

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 replace it with a new one.Check if there are any overheating signs i.e. stains or burns on your electrical equipment. If you have any wires running on the ground, put them aside to prevent yourself and other people from tripping on them. If you are still afraid that the electrical equipment is not safe enough, call for someone professional to come and check it carefully for you.

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 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. Testing can also be done on the sockets of the electric power, but be careful that you use the most appropriate tester.

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.

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.

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 .

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.