Operation; Led Status Monitors - Black Box Async 232 422/530 Manual

ASYNC 232↔422/530 CARD
Once you have configured each Async 232↔422/530 Card and connected
the cables, you are ready to operate the units.

5.1 LED Status Monitors

The Async 232↔422/530 Card features 13 front-panel LEDs that indicate
the condition of the modem and communication link. Figure 5-1 shows
the positions of the LEDs.
Figure 5-1. The Async 232↔422/530 Card front panel,
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5. Operation

Power
UNIT
A
UNIT
B
showing LED positions.
TD
RD
CD
TD
RD
CD