Fibre Optic Board; Figure 22: Fibre Optic Board - GE P4A Technical Manual

P54A/B/C/E Chapter 3 - Hardware Design
6.8

FIBRE OPTIC BOARD

Figure 22: Fibre optic board

This board provides an interface for communicating with a master station. This communication link can use all
compatible protocols (Courier, IEC 60870-5-103, MODBUS and DNP 3.0). It is a fibre-optic alternative to the metallic
RS485 port presented on the power supply terminal block. The metallic and fibre optic ports are mutually exclusive.
The fibre optic port uses BFOC 2.5 ST connectors.
The board comes in two varieties; one with an IRIG-B input and one without:
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