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FiberLink 3334 Series User’s Manual
FiberLink 3334 Series
Data Configuration | Notes
Data Circuit Notes:
Even when installed exactly as directed, it is possible that the data function may fail to
operate properly when using FiberLink units in either the RS-485 2-Wire Auto Tx/Rx more or
the RS-485 4-Wire Multi-Drop mode .
If this problem occurs, it may be that your units are attempting to interface with other
manufacturers’ products that have resting states opposite to the way in wich the FiberLink
units are programmed . (No standard for this exists .) You can compensate for this problem
by switching the polarities of the (+) and (-) pins . To do this, first swap the TX (+) and TX (-)
with one another and then do the same for the RX (+) and RX (-) pins . Make sure to do this
on both the transmitter and the receiver .