Black Box Computer Hardware 802.3af PoE Gigabit Injector, 1-Port Prospecto
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4. Description of LED Functions
Table 1. LEDs and their functions.
LED
State
Function
Description
ON, CONNECT,
All three LEDS light
Power up
Upon power-up, all three LEDs will light for two seconds, as
FAULT LEDs
part of the self-test for the internal microprocessor software.
ON LED
Lights green after
DC output
After two seconds, the ON LED will light green, indicating that
two seconds
voltage available
the DC output voltage is available for powering an 802.3af
PoE compliant load.
CONNECT
Lights green
802.3af load
This green LED lights when a compliant load is attached to
LED
is attached
the output RJ-45 connector.
Blinking
802.3af load
If the load does not comply with 802.3af PoE standards,
is not attached
then the LEDs will blink a code indicating that the load was not
detected. See Table 2 for code descriptions.
detected. See Table 2 for code descriptions.
FAULT LED
Lights red
Overload or
If a fault, such as an overload or short circuit, occurs, then the
short circuit
red FAULT LED lights. See Table 2 for code descriptions.
Lights red for
Power supply is
The red LED will light for two seconds and then go off as the
two seconds,
trying to re-detect
power supply tries to re-detect a valid load. If a compliant
then goes off
a valid load
802.3af PoE load is NOT detected, the LED will indicate the problem
as described in Table 2.
as described in Table 2.
Table 2. Failure detection codes.
Code
Name
Description
1
Incorrect resistive signature
The green CONNECT and red FAULT LEDs blink three times.
2
Incorrect capacitive signature
The green ON LED blinks three times.
3
Incorrect V offset
The green CONNECT and green ON LEDs blink three times.
4
Unstable current measurement
The green ON LED blinks three times.
5
Low voltage sensed during detection (overload)
The red FAULT LED blinks three times.
NOTE: After the LEDs blink three times, the power injector will continue to try to detect a valid load. Until the correct load is applied, the LEDs
will continue to blink. If an open circuit is connected to the output RJ-45 connector, then the LEDs will not blink but the power injector will
continue to try to detect a valid load.
continue to try to detect a valid load.
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Figure 3. Cable connections to the power injector.
LPJ001A-F, version 2