7
·
1
7
7-1 Cable trunk and branch lines
①
On the illustration of the cable wiring below, a bold line means a trunk and the thin lines branched
from the trunk with a “T” shape are called branch lines.
②
The length of branch lines branched from the trunk should be within 400 mm.
③
Total cable length should be within 1 km.
7-2 Relaying of trunk cables
①
To relay trunk cables, use the straight joint (ME-JJ-01).
②
Relaying of trunk cables should be limited to indispensable cases only. Inadvertent relaying of
trunk cables may cause a communication fault such as a weakened signal level due to contact
resistance in the junction connector (straight).
400
mm
ME-JJ-01
400 mm max.
Branch line
Trunk cable
Branch line
Trunk cable
Chapter 7 Wiring
Junction
Junction