Irig-B - GE L30 Instruction Manual

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.
NOTE
The fiber optic communication ports allow for fast and efficient communications between relays at 10 Mbps or 100 Mbps.
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,
and 9N. The 9H and 9K modules have a second pair of identical optical fiber transmitter and receiver for redundancy.
IRIG-B is a standard time code format that allows stamping of events to be synchronized among connected devices. The
IRIG-B code allows time accuracies of up to 100 ns. Using the IRIG-B input, the L30 operates an internal oscillator with 1
µs resolution and accuracy. The IRIG time code formats are serial, width-modulated codes which can be either DC level
GE Multilin L30 Line Current Differential System
3.2 WIRING

3.2.10 IRIG-B

3
3-25