Qlogic QLA 2310F Specifications download pdf (Page 53)

Chapter B Using DC Power 45

Connecting Power Cables

To use the DC power option (–48-VDC) to power the array module, review the

following points.

■ Ensure that you use a separate power source for each optional DC power

connector on the array module. Connecting to independent power sources

maintains power redundancy.

■ It is not mandatory that the second DC power connection on each of the array

module’s DC power-fan CRUs be connected. The second DC power connection

is for additional redundancy only and may be connected to a second DC power

bus.

Caution – A qualified service person is required to make the DC power

connection per NEC and CEC guidelines. A two-pole 20-amp circuit breaker is

required between the DC power source and the array module for over-current and

short-circuit protection. Before turning off any power switches on a DC-powered

module, you must disconnect the two-pole 20-amp circuit breaker.

Caution – Ensure that you do not turn on power to the array module or the

connected drive modules until this guide instructs you to do so. For the proper

procedure for turning on the power, see ““Connecting Power Cables” on page 45.”

Caution – Electrical grounding hazard – This equipment is designed to permit the

connection of the D.C. supply circuit to the earthing conductor at the equipment.

▼ Connecting the Cables

1. Disconnect the two-pole 20-amp DC circuit breaker for the storage array.

2. Ensure that all DC power switches on the DC-powered array module and all

DC power switches on any connected, DC-powered drive modules are turned

off.

3. Connect the DC power connector cable to the DC power connector on the back

of the array module.

Caution – The three source wires on the DC power connector cable (–48 VDC)

connect the array module to centralized DC power plant equipment, typically

through a bus bar located above the cabinet.

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Qlogic QLA 2310F Specifications Page 53