Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Navigation
Guide That Contains This Content
[+] Expand All
[-] Collapse All

    Replacing a C3000 or C5000 DC Power Cable

    Disconnecting a C3000 or C5000 DC Power Cable

    To disconnect a power cable for a DC power supply (see Figure 1):

    1. Switch off the dedicated customer site circuit breaker for the power supply being removed.
    2. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cables might become active during the removal process.
    3. Verify that the status LED on the power supply is not lit.
    4. Remove the power cable from the external DC power source.
    5. Remove the clear plastic shield covering the field-wiring terminals on the power supply.
    6. Remove the screws on the field-wiring and ground terminal.
    7. Carefully move the power cables out of the way.

    Figure 1: Disconnecting a C3000 or C5000 DC Power Cable

    Disconnecting
a C3000 or C5000 DC Power Cable

    Connecting a C3000 or C5000 DC Power Cable

    Warning: Before performing DC power procedures, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the off position, and tape the switch handle of the circuit breaker in the off position.

    To connect a power cable for a DC power supply:

    1. Locate a replacement power cable.
    2. Verify that a licensed electrician has attached a cable lug to the replacement power cable.

      Note: You must bend the cable lug that attaches to the DC power source cable at a 90° angle in order to properly install the clear plastic shield covering.

    3. Verify that the status LED is off.
    4. Insert the DC power and ground cable lugs into the appropriate terminals. Using a number 1 Phillips screwdriver, turn the screw on each terminal clockwise to secure the cable. Apply 8.68 lb-in. (.98 Nm) of torque to each screw.
      1. Insert the positive (+) source cable into the return terminal, which is labeled RTN.
      2. Insert the negative (–) source cable into the input terminal, which is labeled –48V.
      3. Align the ground cable with the ground terminal.

      Caution: Ensure that each cable lug seats flush against the surface of the terminal block as you tighten the screws.

    5. Verify that the DC source power and grounding cables are correct, that they are not touching or blocking access to controller components, and that they do not drape where people could trip on them.
    6. Replace the clear plastic shield over the field-wiring terminals.
    7. Attach the power cable to the DC power source.
    8. Turn on the dedicated customer site circuit breaker to the power supply.
    9. Verify that the status LED on the power supply is lit steadily. If the power supply is correctly installed and functioning normally, the status LED lights green steadily.

    Figure 2: Connecting a C3000 or C5000 DC Power Cable

    Connecting a C3000
or C5000 DC Power Cable

    Published: 2014-06-12