Trendnet TC-NTP1 User's Guide

TC-NTP1 Inline PoE Tester

Common Terms

Power over Ethernet (PoE) System: A typical PoE system comprises a Power Sourcing Equipment (PSE)

and Powered Device (PD).

PSE: Devices that provide power over the Ethernet cable, such as PoE Switches and PoE Injectors.

PD: Devices that receive power from PSE or Injector, such as IP cameras, IP phones, and Wireless Access

Points.

Passive PoE

These type of injectors do not follow IEEE standard and they transmit power at all times.
To prevent damaging the PD, before making a connection, check to make sure that you are using the
correct injector for the PD.

Inline Testing: Connecting both PSE and PD to the tester to monitor the PD’s power usage.

Standards

IEEE 802.3af (PoE), IEEE 802.3at (PoE+), and IEEE 802.3bt 4PPPoE (type 3 & 4)
IEEE standard PSE only transmits power when it detects IEEE standard PD.

Mode A
Uses RJ-45 port pin 1, 2, 3, and 6 to transmit power. DC+ on 1 and 2. DC- on 3 and 6.
Reversed Polarity: DC+ on 3 and 6. DC- on 1 and 2

Mode B
Uses RJ-45 port pin 4, 5, 7, and 8 to transmit power. DC+ on 4 and 5. DC- on 7 and 8.
Reversed Polarity: DC+ on 7 and 8. DC- on 4 and 5.

Precautions

- Use the TC-NTP1 (tester) to test standard PoE devices from 36V ~ 60V and Passive PoE (non-standard)

devices from 11V ~ 60 volts. Maximum current 990mA/50W per mode.

- Always test the PSE first, make sure the PSE and PD are compatible, and then connect the PD to the
tester.

- Please test with Cat 5 or higher network cables.

- During the testing, if you see “HI” on the tester’s display, this means the tester detects voltage of over
60V. When this happens, disconnect all the cables from the tester to avoid damaging the tester.

- Never connect a reversed or unprotected PSE to the tester’s PD port, doing so can damage the PoE
equipment and the tester.

- When performing testing in “T-Mode”, limit the testing time to less than 20 minutes to avoid
overheating the tester.

- For long duration real-time inline testing, please select the “I-Mode”.

- Network cable’s length and quality may affect the test result. Always perform the testing at the jack
where you plan to connect the PD.

TC-NTP1 Front Panel

LED Indicators

Note: When testing with IEEE 802.3bt devices, both Mode A and Mode B should show readings. The total
power consumption is the combine of the two readings.

STEP Button: During inline testing (tester connects to both PSE and PD), by default the tester’s display

shows voltage, amperage, and then wattage in sequence repeatedly. Pressing the STEP button once
allows you to manually go through these readings one at a time starting from the voltage. This is useful
for monitoring a desired reading in real-time.

Ports
PSE: Connection from PSE
PD: Connection to PD

TC-NTP1 Back Panel

Testing Mode Selector

I - Mode: For inline testing over a long period of time. In this mode, the tester measures PD’s power

consumption (Watts) by connecting the PSE’s port to the tester’s PSE port and then connect the tester’s
PD port to a compatible PD. The tester’s display shows the voltage, current, and power consumption in
sequence. Press the “STEP” button at the front panel to stop the cycle and select the desired reading to
monitor in real-time.

T - Mode: The tester acts like a PD and detects PSE’s PoE standard, PoE mode, and measures the voltage
(no reading for current and power). In this mode, you can also perform inline test by connecting tester’s
PD port to a PD that matches PSE’s specification, but limit the testing time to less than 20 minutes to
avoid overheating the tester. For inline testing over a long period of time, please use “I-Mode”.