Table 3-1. Power Status Indications
Indicator
Color
Main Power Status
Remarks
Power Indicator
Off
Power supply unit is
unplugged.
—
Green
Power input is active.
Power supply voltage is within limits.
Green light blinks
once every second
(only if power backup
is connected).
Midspan power supply
failure (disconnected or out
of voltage range).
Unit receives backup power and
continues to function normally.
Maintenance measures must be taken
whenever possible.
Table 3-2. Port Status Indications for PD-90XX Series
Port LED Color
Port Load Conditions
Port Voltage
Off
Inactive load or unplugged port.
Power to port is disconnected. No DC voltage
present on port output lines.
Green
Active load is plugged in
and complies with normal load
conditions.
Continuous nominal DC voltage is present on
spare pairs.
Green blinks once every
second.
Overload or short circuit.
Power to port is disconnected. No DC voltage is
present on port output lines.
Green blinks once every
0.5 seconds.
Valid load.
Total aggregated power exceeds
predefined power budget.
Power is not connected to port.
No DC voltage is present on port output lines.
PD-90XXG
10/100/1000BASE-TX Ports Definition
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2021 Microchip Technology Inc.
and its subsidiaries
User Guide
DS50003153B-page 8
