Is it necessary to use a Network Isolation Choke with an FT 5000 Smart Transceiver?
No. The FT 5000 Smart Transceiver can communicate reliably in the presence of over 3Vrms of common mode noise (EN61000-4-6 Level 2). This level of immunity will eliminate the need for a network isolation choke in most light industrial applications. By implementing the modifications to the standard FTT-10A ESD/surge protection circuitry (see the 5000 Series Chip Data Book), the FT 5000 Smart Transceivers will be able to communicate reliably in the presence of 10Vrms of common mode noise (EN61000-4-6 Level 3) without the need for a network isolation choke.
