GE L60 Instruction Manual page 73

3 HARDWARE
c) 10BASE-FL AND 100BASE-FX FIBER OPTIC PORTS
ENSURE THE DUST COVERS ARE INSTALLED WHEN THE FIBER IS NOT IN USE. DIRTY OR SCRATCHED
CONNECTORS CAN LEAD TO HIGH LOSSES ON A FIBER LINK.
CAUTION
OBSERVING ANY FIBER TRANSMITTER OUTPUT MAY CAUSE INJURY TO THE EYE.
CAUTION
The fiber optic communication ports allow for fast and efficient communications between relays at 10 or 100Mbps. Optical
fiber may be connected to the relay supporting a wavelength of 820 nm in multi-mode or 1310 nm in multi-mode and single-
mode. The 10 Mbps rate is available for CPU modules 9G and 9H; 100Mbps is available for modules 9J, 9K, 9L, and 9M.
The 9H, 9K and 9M modules have a second pair of identical optical fiber transmitter and receiver for redundancy.
The optical fiber sizes supported include 50/125 µm, 62.5/125 µm and 100/140 µm for 10 Mbps. The fiber optic port is
designed such that the response times will not vary for any core that is 100 µm or less in diameter, 62.5 µm for 100 Mbps.
For optical power budgeting, splices are required every 1 km for the transmitter/receiver pair. When splicing optical fibers,
the diameter and numerical aperture of each fiber must be the same. In order to engage or disengage the ST type connec-
tor, only a quarter turn of the coupling is required.
GE Multilin
Figure 3–21: RS485 SERIAL CONNECTION
L60 Line Phase Comparison Relay
3.2 WIRING
3
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