Section 300-Installation Chapter 3. Cabinet Installation576-13-300 DBS 576 (USA), issued 6/2/98 3-11-48 Volt Power Supply (VB-44022)Guidelines• Any cabinet that contains an E&M Tieline Card, Ground Start/Loop Start Card orDID Card must have a -48 Volt Power Supply.• Each cabinet must have a separate -48 Volt Power Supply.Installation1. Turn the power switch and the external breaker OFF, and disconnect the ACcable.2. Insert the -48 Volt Power Supply into the -48 volt power supply slot as shown inFigure 3-11.3. Secure the -48 Volt Power Supply into place by inserting the supplied lockwasher and screw into the front tab.4. Connect the provided 5-conductor power cable to the power connector on thefront of the -48volt power supply.5. Connect the green lead to the cabinet ground terminal as shown.6. Connect the black lead to the - 48 Volt terminal of the power supply.7. Connect the orange lead to the SG terminal of the power supply.8. Connect the red lead to the 24 Volt terminal of the power supply.9. Connect the blue lead to the GND terminal of the power supply.10. Connect the supplied green wire from the SG terminal of the power supply tothe upper Power Supply ground screw.11. Reconnect the AC cable, turn the external breaker to ON and turn the powerswitch to ON.CAUTION:• Turn the power switch and the external breaker OFF, and disconnect theAC cable before installing the -48V power supply.
