Optical Systems OSD1250, Руководство оператора

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OPTICAL SYSTEMS DESIGN
OSD1250 OPERATOR MANUAL
PAGE 12 DOC ID: 10106110
2.5 ALARMS
The OSD1250 has an open drain MOSFET rated at 200mA @ 50V max on pin 26 of the DB26 connector. Output at pin26 is
0Ω when unit is powered and ring/bus fiber link present. The output at pin26 becomes high impedance on all units on ring/bus
when any fiber link is broken or the unit is off along the ring/bus. The output can be connected to a relay coil as shown.
FIGURE 4: CONTACT CLOSURE OUTPUT
2.7 FIBER OPTIC CABLE CONNECTION
The OSD1250 supports all commonly available multimode and singlemode optical fibers. Remove the protective caps from the
optical output and optical input ports.
Before inserting the optical connectors ensure they are free from any contamination. If they need cleaning use alcohol and lint
free tissues. Connect the already terminated cables to the output/input ports. Ensure that the optical output port of one
OSD1250 connects to the optical input port of an OSD1250 at the other end.
Remember that the optical transmit channel of one modem connects to the optical receive channel of the next unit of the
system and vice versa.
Figure 6 shows the set up for a typical bus configured system and Figure 7 shows a typical ring configured system.
DB26
Pin26
OSD1250
50V
(max)
External
Relay