5
TYPICAL SYSTEM DATA CONNECTIONS
The RS422 or RS485 four wire interconnection between the RR-984C-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 TX or Data Out of the copper device is connected to the RX or Data In of the RR-984C-SL. The
plus terminal of the copper device is connected to the plus terminal of the RR-984C-SL and the minus
is connected to the minus. The reverse flow of data from the RR-984C-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 received (data in) wires.
DATA CONFIGURATION
The RR-984C-SL is factory shipped with the data channel configured in the RS485-4 wire mode.
In order to reconfigure the data channel, the configuration switch bank on the top of the unit needs to
be modified.
See the tables below for a summary of the switch settings.
Data Switch Off=Up On=Down
1 2 3
4 5
Off
Off
Off
Off
Off
RS485-4W / Manchester
On Off On
Off Off
RS485-2W
Off On Off
On Off
RS422
On On On
On Off
RS232
RR-984C-SL STATUS INDICATORS
The RR-984C-SL transmitter provides the following LED status indicators to aid in installation and
troubleshooting:
DATA TX
A green LED indicator is provided to monitor the input data from the electrical interface and out onto the
fiber. The intensity of this indicator will vary with input data patterns. However, in typical applications it
will cycle on and off as data is transmitted. Data status associated with this LED is summarized below.
Data TX LED
Data Status
Green
Data Flow Present
Off
Data Flow Not Detected
DATA RX
A green LED indicator is provided to monitor the data coming in from the fiber and out onto the
electrical interface. The intensity of this indicator will vary with input data patterns. However in typical
applications it will cycle on and off as data is received. Data status associated with this LED is
summarized below.
Data RX LED
Data Status
Green
Data Flow Present
Off
Data Flow Not Detected