Fibre Optic Board; Figure 18: Fibre Optic Board - GE MiCOM P40 Technical Manual

Chapter 3 - Hardware Design
The IRIG-B facility is provided in combination with other functionality on a number of additional boards, such as:
Fibre board with IRIG-B
●
● Second rear communications board with IRIG-B
Ethernet board with IRIG-B
●
Redundant Ethernet board with IRIG-B
●
There are two types of each of these boards; one type which accepts a modulated IRIG-B input and one type
which accepts a demodulated IRIG-B input.
6.7

FIBRE OPTIC BOARD

Figure 18: 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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P446SV
P446SV-TM-EN-1