Yaskawa MP920 Communications Module - Manual (Page 314)

Appendix D Wiring Communications
D.4.2 Indoor and Outdoor Panel-to-Panel Optical Wiring
D-22
Pm: System margin (1.5 dBmp)
Ps: Fusing connection loss (0.2 dB per position)
Pa: Connector relay loss (1.2 dB per position)
Pc: Optical fiber cable (GI-50/125, λ = 850 nm) loss (2.5 or 3.0 dB/km)
Calculating the Maximum Transmission Distance for the CP-215
Repeater-TS5
Where,
PL = Po - Pi - Pm (dB)
= -22 + 29 - 1.5
= 5.5 (dB)
PL: Allowable loss for optical sending and receiving (5.5 dB)
Po: Optical sending level (-22 dBmp)
Pi: Optical receiving level (-29 dBmp)
Pm: System margin (1.5 dBmp)
Ps: Fusing connection loss (0.2 dB per position)
Pa: Connector relay loss (1.2 dB per position)
Pc: Optical fiber cable (GI-50/125, λ = 1,300 nm) loss (0.7 or 1.0 dB/km)
(km)
Pc (dB / km)
PL - Ps - Pa (dB)
= L