YASKAWA MP920 User Manual page 312

Control panel
Optical Repeater
Terminal box
Optical connector
Optical connector: FC
Direct Connection Method
This method directly connects optical fiber cables outside a control panel to optical connec-
tors inside the control panel.
Control panel
Optical Repeater
Optical connector
Calculating the Maximum Transmission Distance
The maximum transmission distance differs according to the method for connecting optical
fiber cables inside a control panel to optical fiber cables outside the control panel or connect-
ing optical fiber cables between control panels (fusing connection or connector relay connec-
tion) as well as the connection position.
Calculating the Maximum Transmission Distance for the 215IF
Repeater-TS2
PL - Ps - Pa (dB)
L = (km)
Pc (dB / km)
Where,
PL = Po - Pi - Pm (dB)
= -18 + 28 - 1.5
= 8.5 (dB)
PL: Allowable loss for optical sending and receiving (8.5 dB)
Po: Optical sending level (-18 dBmp)
Pi: Optical receiving level (-28 dBmp)
Two-core crystal glass
optical fiber cable
Terminal box
Conversion Adapter: 0D-9384, manufactured by NEC
Two-core crystal glass
optical fiber cable
D-21
D.4 Wiring Optical Fiber Cables
Control panel
Optical Repeater
Control panel
Optical Repeater
D