Connecting the DC Power Cables to a -48 V Source

1. Verify that the DC circuit is de-energized.
2. Attach an ESD-preventive wrist strap to your bare wrist and connect the metal end to an appropriate ground point on the rack.
3. Verify that the ground wire is attached to the power supply.
   See Connecting the Ground Wire to a 300 W DC Power Supply.
4. Slide the cover off the terminal block.
5. Connect the DC power input cables as follows:
   1. On each terminal, loosen the screw enough to allow the spade terminal to slide underneath the captive square washer.
   2. Slide the spade terminal of the negative wire (–48 V) under the captive square washer on the negative terminal (labeled –48 V).
   3. Slide the spade terminal of the positive wire (–48 V RTN) under the captive square washer on the positive terminal (labeled RTN).
      See Connecting the DC Power Cables: Part 1.

      

      Connecting the DC Power Cables: Part 1

      
   4. Tighten both screws on the terminal block to 15.9 in-lb (1.8 N-m) as shown in Connecting the DC Power Cables: Part 2.
      

      Connecting the DC Power Cables: Part 2

      
6. Slide the cover into place over the terminal block.
7. Energize the DC circuit.