Typical System Data Connections; Data Configuration Switches - AFi MT-944C-SL Instruction Manual

TYPICAL SYSTEM DATA CONNECTIONS

The RS422 or RS485 four-wire interconnection between the MT-944C-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 MT-944C-SL. The plus terminal of
the copper device is connected to the plus terminal of the MT-944C-SL and the minus is connected to
the minus. The reverse flow of data from the MT-944C-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 MT-944C-SL becomes Data Out on the MR-944C-SL or the RR-944C-
SL after going across the fiber. The reverse flow follows the same orientation.

DATA CONFIGURATION SWITCHES

NOTE: This unit is shipped with Data Channel 1 in the RS485 4-wire configuration.
For other configurations of data channel 1, please refer to the drawing below for changes to the default
switch settings. These configuration switches are located on the right side of the unit and can be
modified without opening the unit.
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