Thanks for contacting Teltonika Networks’ technical support team.
Both cables can be used to power Teltonika Networks’ deviceswhichhave a 4-pin power socket. The difference between PR2PL15B and PR2FK20M is the output connector they use.
PR2FK20M features a 4-pin connector with a 3mm pitch block, while PR2PL15B consists of simple cables without any extra connectors. Furthermore, both cables ensure the proper functioning of the digital input and output.
If we are talking about the differences in the wires themselves. Then PR2FK20M has 26 AWG gauge wires which have a total length of 2000 mm. While PR2PL15B has 20 AWG gauge wires which have a total length of 1500 mm.
The choice to use one cable or another depends on the use case and the installation you are planning to do.
For more technical information view their datasheets below: