Connect Alarm Contact
Connect wires from the equipment monitoring the Serial Data Fiber Link to the alarm terminals located on the top
of the unit next to the power terminals. The alarm relay offers a Common, Normally Open, and Normally Closed
position.
When the system is communicating and properly functioning the Fiber LED will turn ON and the alarm relay will
energize. If DC Power is lost, Fiber is broken, or one side of the system stops functioning the alarm relay will
de-energize and the FIBER LED will be OFF.
Front Panel LED Indicators and Dip Switches
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Troubleshooting
If problems occur, please follow the troubleshooting steps below prior to contacting technical support.
POWER LED Indicator OFF
•
Check power supply voltage and rated device voltage.
•
If correct, check connections at the power terminals.
FIBER LED Indicator Off
•
Optic port connection may be incorrect.
•
Make sure fiber cable from the TX optic is connected to the RX optic on both ends of the system.
•
Make sure single-mode equipment is using single-mode fiber and multimode equipment
is using multimode fiber.
•
Check to ensure the fiber path is within the dB Loss and distance specifications of the model being installed.
TX and RX LED Indicators Off
•
Verify serial data pinouts of each end device.
•
The fiber optic media converters must always be set to DTE on one side, and DCE on the other.
•
Null or straight through cables will need to be appropriately used to connect to the end devices.
If all connections and indicators has been verified please contact the RLH support team for further assistance.
FIBER LINK
RS-232
SERIAL
DATA
FIBER LINK
RS-232
SERIAL
DATA
RLH Industries, Inc.
RS-232
FIBER
TX
RX
POWER
RX
FIBER
TX
N/A
N/A
DTE
DCE
Indicator
Color
LED
Description
POWER
Green
OFF
System has NO power
ON
System has power
FIBER
Green
OFF
No Fiber Link detected
ON
Fiber Link detected
TX
Green
OFF
No activity
ON/BLINKING
Copper signal transmitting
RX
Green
OFF
No activity
ON/BLINKING
Copper signal receiving
Detail of LED Indicators
RLH Industries, Inc. • Tel. 866-DO-FIBER • Fax 714 532-1885 • www.fiberopticlink.com
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