Hardware reference guide

Modbus Plus NOM
282
35013379 11/2011
The following figure shows the mixed fiber optic/copper network.
The following figure shows the pure fiber optic network.
NOTE: The distance between nodes on fiber is limited by the maximum allowable
power loss from end-to-end (3 km over 62.5 mm fiber). Power loss includes the fiber
optic cable attenuation, connector losses at the Fiber Optic Receiver and
Transmitter ports, and the system margin of 3 dB.
The end NOM25200 in this configuration will have the FRNGoff LED active and will
display the Cable B Framing error in the MBPSTAT (in ladder logic).