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DATA INPUT / OUTPUT CONNECTIONS
Data input and output connections are made via terminal blocks on the back of the RR-482D-
1470/1490 unit. See the drawings below for proper orientation of input and output connections.
Please note that the far right pin on each connection drawing corresponds with the far right pin
when looking at the terminal block from the back of the unit.
TYPICAL SYSTEM DATA CONNECTIONS
The RS422 or RS485 four wire interconnection between the RR-985D-SL and the copper
device to which it is attached is based on industry standard EIA terminology for the transmission
of electronic data signals. Using this terminology, the driver of an electronic signal is labeled TX
or Data Out. Correspondingly, the receiver of an electronic signal is labeled RX or Data In.
Following this standard, the Data Out of the copper device is connected to the Data In of the
RR-985D-SL. The plus terminal of the copper device is connected to the plus terminal of the
RR-985D-SL and the minus is connected to the minus. The reverse flow of data from the RR-
985D-SL to the copper device follows the same pattern. Not all manufactures follow standard
EIA terminology. Consult the installation instructions for your copper device if you are unsure
which two wires are the drive (data out) wires and which two wires are the receive (data in)
wires.
Please note that Data In on the RR-985D-SL becomes Data Out on the RT-985D-SL after going
across the fiber. The reverse flow follows the same orientation.