Optical Systems Design OSD138, Operator'S Manual, Page: 11 / 20

OPTICAL SYSTEMS DESIGN
DOC ID: 10105510
OSD138 OPERATOR MANUAL
PAGE 9
2.2.3 POWER SUPPLY CONNECTIONS
The OSD138 card version is powered from the OSD370 or OSD350 chassis. DC power on the OSD138
card version is connected via the DB9 connector. The card version of the OSD138 should be fixed into
the chassis using the captivated screws and can be plugged in or out of the chassis with power on or
off.
The OSD138 module requires external DC or AC power. The voltage range of the OSD138 is +11V
DC
to +35V
DC
or 22 to 28V
AC
with maximum current requirement of 1.8VA. Power should be connected to
the power connector located at the back of the case (see Figure 5), and as indicated in Table 4.
TABLE 4: DC POWER CONNECTION
External Power Pin Specification
Pin 1
+11V to +35V DC or
22 to 28V AC
Pin 2 Ground
FIGURE 5: OSD138C POWER SUPPLY CONNECTIONS
NOTE:
1. The OSD138 card version should be fixed into the OSD370 or OSD350 chassis using the
captivated screws
2. The cards can be plugged in or out of the chassis with power on or off.
2.2.4
BASIC CONNECTIONS
Data signals are connected to the 8-way terminal block connector as set out in Table 3.
The optical fiber cable must be terminated with the appropriate optical connector. Before connection,
inspect the ends of the connectors to ensure that no dust or dirt is present as it could contaminate the
modem connector and result in poor performance.
If it is necessary to clean the cable connectors, use isopropyl alcohol and lint free tissue to remove
contamination.
1 2 3 4 5 6 7 8
8-Way Data Connector
Power Connector
1 2