N2 Bus applications are self terminating and have no EOL setting. See the
N2 Bus rules
section for
more information on EOL requirements on an N2 Bus.
The NCE25 models that support MS/TP FC Bus applications or N2 Bus applications have an EOL
switch, which must be set according to the position of the NCE on the FC Bus or N2 Bus segment.
The NCE25 is shipped with the EOL switch in the factory default, ON (up) position (Figure 14).
Figure 14: FC bus EOL switch in the factory default ON (Up) position
See the following figure to determine the appropriate EOL switch setting for the NCE in your field
bus application.
Figure 15: EOL switch setting relative to NCE position on the N2 Bus or FC bus segment
Setting the network and device addresses
You must assign a new IP network address to the NCE25, so it can communicate on the IP Ethernet
network. The network engine MAC address on a label on the housing.
The network engine is always the SA Bus supervisor and, therefore, always has a fixed device
address of 0 on the SA Bus.
The supervisory controller on NCE25 models that support an (MS/TP) FC Bus is always an FC Bus
supervisor and has a fixed device address of 0 on the FC Bus. The field controllers in all the NCE25
models have fixed device addresses of 4 on the network engine FC Bus.
Refer to the
MS/TP Communications Bus Technical Bulletin (LIT-12011034)
for more information on
device addresses on (MS/TP) FC Buses and SA Buses.
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NCE25 Installation Instructions