TSF000 Powering Options
This chapter contains information on powering options supported by TSF000 switch.
Power socket
The switch has a 3-pin industrial DC power socket and can be powered by a 7-57 VDC power supply unit (PSU). Refer to the image below for the power socket's pinout information:
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If you decide not to use the standard 9 VDC power supply unit and want to power the device with other voltages (7-57 VDC), please make sure that you choose a power supply of high quality. Some power supplies can produce voltage peaks significantly higher than the declared output voltage, especially during connection and disconnection.
While the device is designed to accept input voltage of up to 57 VDC peaks, high voltage power supplies can harm the device. If you want to use high voltage power supplies it is recommended to also use additional safety equipment to suppress voltage peaks from the power supply.
Note that TSF000 PoE ports works properly when switch is powered using PSU, which can supply 44 VDC or higher voltages. If TSF000 switch is powered with voltages ranging from 7 VDC to 43 VDC, it will work as standard switch, without PoE capabilities.
Disclaimer: TSF000 and Passive PoE devices
There are a couple of options to stay safe when using TSF000 Active PoE with devices that only support Passive PoE:
- Connect TSF000 and Passive PoE device only via non-PoE Ethernet ports (for example, do not use TSF000 PoE ports with LAN1 ports on Teltonika devices).
- If there is a need to use LAN1 port on the end device, make sure that TSF000 and the end device are powered from different voltage sources (for example, power both devices from different PSUs, or different batteries).
If TSF000 and a Passive PoE device are connected with common ground, do not use LAN1 port, other ports can be used (refer to image below):
Ground loops
Do not connect the power supply negative terminal of our device to the chassis or earth exclusively.
This connection could cause ground loops. For example, if the antenna shield and power supply negative terminal are connected to the chassis or earth, it forms a ground loop, therefore unwanted current could flow through a device PCB ground and may cause damage.
In networking switches connecting our device power supply negative terminal to the chassis or earth could cause damage to other devices connected to the switch or unintentional power up of other devices.
