Echelon LonWorks Twisted Pair Control Module Manuel d'utilisateur télécharger pdf (Page 29)

LonWorks Twisted Pair Control Module User's Guide 21

Wire Characteristics

Due to the many cabling and termination options available for the TP/FT-10

channel, please refer to the Series 5000 Chip Data Book, FTT-10 Free Topology

Transceiver User's Guide, or FTT-10A Free Topology Transceiver User's Guide, as

applicable, for information on wire characteristics and terminations.

The Junction Box and Wiring Guidelines for Twisted Pair LonWorks Networks

engineering bulletin (005-0023-01) provides a list of cable vendors for each type of

supported cable. This bulletin is available from the Echelon Web site

(www.echelon.com

Cable Terminations – Free Topology

In a TP/FT-10 free topology segment, only one termination is required and can be

placed anywhere on the free topology segment. There are two choices for the

termination:

1. RC network (see Figure 10), with R1 = 52.3 Ω.

2. LPI-10 or LPI-11 Link Power Interface, with jumper at "1 CPLR" setting.

Figure 10. RC Network Termination for TP/FT-10 Segments

Cable Terminations – Doubly Terminated Bus

In a TP/FT-10 doubly terminated bus topology, two terminations are required,

one at each end of the bus. There are two choices for each termination:

1. RC network (see Figure 10), with R1 = 105 Ω.

2. LPI-10 or LPI-11 Link Power Interface, with jumper at "2 CPLR" setting

if resident on a link power segment. Only one LPI-10 or LPI-11 Interface

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Echelon LonWorks Twisted Pair Control Module Manuel d'utilisateur Page 29