Specifications
Fiber Modem between Two Segments
If you need to place the 2110 modem between two segments of MS/TP bus, wire a stub length of 6 inches or fewer
as shown in Figure 19, and terminate the two pairs of MS/TP bus cable at the end of the stub length.
If the fiber modem is at the end of a segment, set the EOL to In.
Figure 19: Connecting 2110 Modem in between Two MS/TP Bus Segments
Setting Termination on Fiber Modems
The 2110 modem does not have an EOL jumper. Instead, establish EOL termination on a 2110 modem by properly
terminating the FC bus wires to the 9-pin connector. Soldering the wires to specific pins and soldering two jumper
wires configures the modem as an end-of-line device (see Figure 20, Figure 21, and Table 15 for more information).
Do not set the fiber modem as an EOL device on the SA bus.
Modem Set EOL to In
To set the modem as an end-of-line device, wire the 9-pin connector using solder connections as shown in Figure
20.
Note: The following figure shows the 9-pin female connector. The pin numbers on the 9-pin male connector are
reversed.
42MS/TP Communications Bus Technical Bulletin: Appendix: FC Bus Auxiliary Devices