Cisco Catalyst 9400 Series Hardware Installation Manual page 27

Product Overview
Pressing the power button on and off turns the main 55-VDC output on and off, respectively. Standby
output power of 3.3-VDC is available whenever DC input is applied.
The power button has two modes of operation, which are described below. Press the power button for
10 seconds to toggle between modes; the LOCATE LED blinks for three seconds when you do.
• Has dual DC inputs.
Each input has an independent, isolated circuit. -A and +A form one DC-input; +B and -B form another.
Each DC input can be powered either from separate sources, or a suitable single source. The module has
one operational mode as a function of both inputs receiving power. When both the inputs are active, a
regulated 55-VDC PoE-compliant main output and 3.3-VDC standby output is provided.
• Has DC-input reversal protection such that the unit will survive DC-input reversal up to the full input
voltage rating.
• Supports redundant and combined configuration modes. A single (nonredundant) or a dual (redundant)
power supply configuration, can support the following loads:
Input Voltage (in Volts DC)
40-72 VDC (with an extended range to 75 VDC)
A voltage differential between inputs is acceptable,
as long as the value is within the above range. For
example, one DC input can have an input voltage
of 40 VDC and the other, 75 VDC.
• Has a built-in, front-facing, passive RFID tag that uses Ultra High Frequency (UHF) RFID technology
and requires an RFID reader with compatible software. Provides auto-identification capabilities for asset
management and tracking. The RFID tags are compatible with the Generation 2 GS1 EPC Global Standard
and are ISO 18000-6C compliant. They operate in the 860-MHz to 960-MHz UHF band. For more
information, see
• Auto-on: When in this mode, the power supply module automatically starts or restarts on application
or restoration of DC input power. This is the default mode.
For NEBS compliance, the power button must be in the auto-on mode. When power is restored after
a power failure, the power supply module recovers automatically.
• Protected: When in this mode, if the DC power source output voltage is zero, or drops out for more
than three seconds, you must press the power button for two seconds, to restore operation.
Radio Frequency Identification (RFID) on Cisco Catalyst 9000 Family
Output Power with C9400-PWR-3200DC (in Watts)
3200 W
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
Power Supply Module Overview
Switches.
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