Sharp JW-20CM Manual de usuario descargar pdf (Pagina 117)

9·19

From the previous page

Set LT (termination resistance) switch

• When master module or slave module is at

either end the communication line, make sure

to set the termination resistance switch "ON."

Reference: Function of the termination resistance switch

If the communication line does not have a termination resistance, the high frequency signal will

be reflected at the ends of the cable. These reflected signals can collide with the original

communication signals, so that some stations will not be able to communicate normally. The

use of termination resistance suppresses reflected signals. If the termination resistance switch

on any of the stations in between the end of the cable is turned ON, the station will generate a

reflection wave signal or attenuate the original signal and may not communicate normally.

· When the trunk line has a branch in it, turn ON the termination resistance at the station on the

trunk cable.

· If you use a terminator (termination resistance made by Toko Denshi: ME-75) at the end of a

signal cable, turn OFF the termination resistance at the station on the end of the cable.

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(ON)

Turn ON the termination resistance

switches on these two stations.

Trunk cable

"T" branch

Termination

resistance (ON)

Drop cable

(branch line should

be less than 400 mm)

TerminatorTerminator

Less than 1 km

Terminator: ME-75

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Sharp JW-20CM Manual de usuario Pagina 117