SM500A—Automatic Switching System
Black Box Corporation
24
990-000-0001-E8
Figure 3.3A. Connecting the AC Redundant Power Supply (SM535A) to the power inputs on the
Control Card.
d. Outside Power Source, -48VDC at 1A DC
Use an outside source for Power Supply/Control Card SM532-C and Advanced Control
Card SM534-C. Connect leads from the outside power source to the control card two-pin
terminal strip connector, which is provided with the card (figure 3.3B). Also, verify that
the PS1 LED on the SM500A chassis front panel is illuminated.
