You can install up to four 3KW AC power supplies in the chassis. Ensure all power connection wiring conforms to the rules and regulations in the National Electrical Code (NEC) as well as local codes.

This table summarizes the list of power supplies' input and output power ranges for different input applications:

When connecting AC-input Power Supply Units (PSUs) to the site power source, observe the guidelines described here.

Warning

Statement 1028—More Than One Power Supply This unit might have more than one power supply connection. To reduce risk of electric shock, remove all connections to de-energize the unit.

• Ensure that the AC-input power supply module has a detachable power cord.

• Each chassis power supply should have a separate, dedicated branch circuit.

  • North America

    • 85-3KW-HVPI —Power supply modules require a 20 A circuit.

  • International—Circuits should be sized according to local and national codes.

• If you are using a 208 or 240 VAC power source in North America, note that such lines are considered hot and the circuit must be protected by a two-pole circuit breaker.

  Warning

  Statement 1005—Circuit Breaker This product relies on the building’s installation for short-circuit (overcurrent) protection. To reduce risk of electric shock or fire, ensure that the protective device is rated not greater than: 20A.

  • 20 A (North America) and 16 A (Europe) circuit breaker for an AC-input power supply module.

  • 80 A DC-rated circuit breaker for each input of a DC-input power supply module, for safety purposes - irrespective of whether the inputs are power from a single or separate DC sources.

  Warning

  Statement 1022—Disconnect Device To reduce the risk of electric shock and fire, a readily accessible disconnect device must be incorporated in the fixed wiring.

• The source AC outlet must be within 9.84 to 14 feet (3.0 to 4.293 meters) of the system - depending on the length of the power cord, and should be easily accessible.

• The AC power receptacles used to plug in the chassis must be the grounding type. The grounding conductors that connect to the receptacles should connect to protective earth ground at the service equipment level.

When connecting DC-input Power Supply Units (PSUs) to the site power source, observe the guidelines described here.

Warning

Statement 1003—DC Power Disconnection To reduce risk of electric shock or personal injury, disconnect DC power before removing or replacing components or performing upgrades.

Warning

Statement 1046—Installing or Replacing the Unit To reduce risk of electric shock, when installing or replacing the unit, the ground connection must always be made first and disconnected last. If your unit has modules, secure them with the provided screws.

Warning

Statement 1022—Disconnect Device To reduce the risk of electric shock and fire, a readily accessible disconnect device must be incorporated in the fixed wiring.

Warning

Statement 1024—Ground Conductor This equipment must be grounded. To reduce the risk of electric shock, never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available.

Warning

Statement 1033—Safety Extra-Low Voltage (SELV)—IEC 60950/ES1–IEC 62368 DC Power Supply To reduce the risk of electric shock, connect the unit only to a DC power source that complies with the SELV requirements in the IEC 60950-based safety standards or the ES1 requirements in the IEC 62368-based safety standards.

• All power connection wiring should conform to the rules and regulations prescribed by the National Electrical Code (NEC), as well as local codes, if any.

• The DC return must remain isolated from the system frame and the chassis (DC-I).

  The color coding of the source DC power cable leads depends on the color coding of the site DC power source. Typically, green or green and yellow stripes indicate that the cable is a ground cable. Since there is no color code standard for source DC wiring, you must ensure that the power cables are connected to the DC-input power supply terminal block in the proper + and - polarity.

  In some cases, the source DC cable leads might have a positive (+) or a negative (–) label. This label is a relatively safe indication of polarity, but you must verify the polarity by measuring the voltage between the DC cable leads. When measuring, ensure that the positive lead and the negative lead always match the "+" and "-" labels on the DC-input power supply terminal block, respectively.

• DC power cables use the M-CRPS connector at the power supply end.

• The circuit must be protected by a dedicated two-pole DC-rated circuit breaker.

  The circuit breaker is considered to be the disconnect device and must be easily accessible. For DC-input power supply units with multiple inputs, each DC input must be protected by a dedicated DC-rated circuit breaker or a fuse.

  The circuit breaker or fuse should be sized according to the power supply input rating and local or national code requirements.

• If the DC inputs are powered from separate sources, the cables must be wired straight across to their respective sources and terminals.

  Crossed cables in a setup where the DC source has floating outputs means that no damage will occur, but the LEDs will not light up, and the module will not operate.

  Crossed cables in a setup with a positive ground or a negative ground power system constitute a severe safety hazard that includes causing electric shock and generating excessive EMI and RFI.

  Note	In the illustration, the red and black cables do not interconnect. The two black cables are connected to the same negative output of the DC source; the two red cables are connected to the same positive output of the DC source.