September 2011
73
V1.44
Copyright © 2011 Adept Systems, Inc. and Control Network Solutions Ltd All Rights Reserved.
Fig.4.12: Functional Block On Drawing
5. FTT-10 XCVR LonTalk Network Termination
When using an FTT-10 XCVR, the network wiring should be terminated or performance may
suffer. This is especially true for long wire runs or noisy environments. Typically an external
terminator is used. The eNodeIV, however, does have an optional internal terminator for those
applications where it is desirable or convenient to terminate at the router. When the optional
internal terminator is installed, a jumper on header JP1 is used to configure the type of
termination. In order to do this the case must be opened. Disconnect the power and network
before opening the case. Use caution and appropriate electrostatic safety precautions
whenever working with the case removed. If the centre pin of JP1 is jumpered to the pin
labelled
Free
, then the terminator is set for free topology mode. If the centre pin of JP1 is
jumpered to the pin labelled
Bus
, then the terminator is set for bus mode. If the centre pin is
not jumpered to either the Bus or Free pins then the terminator is disabled. The following
figures show photos of JP1 with the jumper in the 3 different settings.
A. Bus