The communication backplane PCB is made of isola 370hr material. The communication backplane bus is a high-speed data path between the PLC host and the I / O expansion module, supporting the I / O data refresh between the host and the expansion module.

Technical specifications
Build parameters for this board.
| Layers | 4 |
| Hybrid press | RO4350B + FR4 |
| Impedance | ±5% |
| Application | Antenna feeds |
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