Does anyone know how I can power a PTP 400 without the PIDU. We have a very specialized application and need to use our own 48V source without the PIDU. We want to inject the 48V directly into the ethernet cable. Just splitting off the wires, tying together the two +48 volt wires and the two ground wires does not work. It appears that some low level signaling is done on the power lines between the PIDU and the PTP 400. Any suggestions?
SDnPhoenix wrote: Does anyone know how I can power a PTP 400 without the PIDU. We have a very specialized application and need to use our own 48V source without the PIDU. We want to inject the 48V directly into the ethernet cable. Just splitting off the wires, tying together the two +48 volt wires and the two ground wires does not work. It appears that some low level signaling is done on the power lines between the PIDU and the PTP 400. Any suggestions?
The correct impedance is critical on the pairs and is part of the turn up and verification of the BH radio. You are correct in assuming that there is extra signaling going on there, namely "recovery mode" on the radio if you short one of the pairs.
I don't recall if there was a wiring/signaling schematic on those radios in the manual, might be worth checking the Orthogon site (probably under motorola now).
There is a 48VDC input on the PIDU.