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Chapter B Using DC Power 93
■ “Ship Kit Changes” on page 93
■ “DC Power LEDS” on page 93
■ “Connecting Power Cables” on page 94
■ “Turning Off the DC Power During an Emergency” on page 96
■ “Relocation Cautions” on page 96
Ship Kit Changes
If the DC power option is ordered, two DC power connector cables are provided
with each controller tray for connection to centralized DC power plant equipment.
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.
DC Power LEDS
FIGURE B-3 shows the LEDs, on/off power switch, and power cable receptacle on the
back of the DC power module.
FIGURE B-3 DC Power Module LEDs, Power Switch, and Power Cable Receptacle.