Sens NRG24-20 Specifications download pdf (Page 65)

POWERCOMMAND NETWORKS

ETWORK CABLING AND CONNECTIONS FOR FTT-10 NETWORKS

Table 2 Double-Terminated Bus Topology

Maximum Bus length (Ft)

Belden 8471 8800

Belden 85102 8800

NEMA Level IV 4500

TIA Category 5 2900

A double-terminated bus may have stubs of up to 10 feet from the bus to each device.

Cable Termination

FTT-10 network segments require termination for proper data transmission performance. Free

topology and Double-terminated Bus topology networks differ in their termination requirements.

Free topology segments only require one terminator per segment. This terminator can be placed

anywhere in the segment, but is recommended to be placed near the middle of the segment. All

PowerCommand network interface modules (i.e. GCM, NCM, GLC), Control Communications

Modules (CCM), Digital I/O Modules (DIM) and Lonworks Annunciators have an on-board free

topology terminator. It is recommended that this be used on a free topology segment. Optionally an

external free topology terminator (Onan P/N 0300-5669) can be used.

Double-terminated Bus segments must be terminated at both ends of the segment. An FTT-10 Bus

terminator (Onan P/N 0300-5729) must be used.

This information was accurate on the date published but Page 2 July 25, 2003

could change without notice.

* Optimal Cable

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Sens NRG24-20 Specifications Page 65