Fiber Optic Extender Boards - Honeywell LC13-510 Manual

3.3.7 Fiber Optic Extender Boards (LCNE/LCNE2, FOCT, FOCR, LCNFL, CS/R)
The LCNE2 board is a later revision of the LCNE board. They are functionally equivalent and
your system may include either or both types.
3.3.7.1 Normal Indicators
Under normal system operating conditions, the following indicators and switch settings are
present on the LCNE Extender Set.
• is out.
Red LED
• is on.
Green LED
• is either blinking on and off (indicating traffic) or stays on (heavy
Yellow LED
traffic).
•
RUN/RESET
3.3.7.2 Troubleshooting Indicators
If a remote segment has gone dead, check the following:
1. Red LED on all LCNE or LCNE2 boards should be off. If a red LED is on, the
Antijabber Flag is set. The failure that caused this to happen is on the board with
the LED on. Replace that board using the procedures in LCN Guidelines, part of
the LCN Installation binder. See Section 7, LCNE and Fiber Optic Link Service,
in that manual.
2. Green LED on LCNE or LCNE2, FOCR, LCNFL must be on steady. If a green
LED is not lit (or is flickering), there is not enough light power being received
from the fiber optic cable. Check the following:
a. Cable integrity: Check for cut, damaged, or kinked cable.
b. Light received: Measure the light power at the receiving end of the
cable. A minimum of 2.5 µW must be measured.
c. Light transmitted: Measure the light power at the transmitter, a
minimum of 50 µW must be measured, using a one-meter length of
fiber optic cable.
3. Yellow indicator should be on as data traffic is passed.
If a fiber optic connection that had previously worked ceases to do so, and no fault can be
found with the LCNE/LCNE2/FOCT/FOCR boards, make the power measurements
discussed in LCN Guidelines, part of the LCN Installation binder. See Section 5,
Post-Installation Power Measurement, in that manual.
Dual Node Module Service
NOTE
switch on the LCNE or LCNE2 is in the run position.
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