Specifications

PL 3120/PL 3150/PL 3170 Power Line Smart Transceiver Data Book 151
It is important to be aware that the PL Smart Transceiver used in conjunction with some of the coupling circuits listed in
this chapter might experience a reset event when subjected to higher surge levels. The system designer must determine if
their application can tolerate a reset event under high surge conditions.
The level of immunity to reset events under surge conditions varies from one coupling circuit to another – as well as with
specific layout. Samples of the example coupling circuits in this chapter have been demonstrated to operate without reset
when subjected to surge levels of 2kV. The greatest immunity levels can generally be achieved by locating D101 and
C103 such that positive surge currents return to ground without passing close to the PL Smart Transceiver.
If a non-isolated coupling application requires greater reset immunity then the optional components shown in Figure 4.28
can be added. The corresponding optional components to increase reset immunity with isolated coupling circuits are
shown in Figure 4.29. Samples of coupling circuits that include these optional components have been demonstrated to
not reset when subjected to 6kV surge events.
Figure 4.28 Optional Components for Non-Isolated Coupling Circuits