• Supported Platforms
• T1600 Routers

• Related Topics
• T1600 Power System Description
• Maintaining the T1600 Power Supplies
• Troubleshooting the T1600 Power System
• T1600 Preventing Electrostatic Discharge Damage
• T1600 General Electrical Safety Guidelines

Installing a T1600 DC Power Supply Cable

You can use this procedure to install a DC power cable on either a three-input 240-A DC power supply or a four-input 240-A DC power supply. To install a DC power supply cable:

1. Locate a DC power cable that meets the specifications defined in T1600 DC Power Cables and Lugs.

   Caution: A licensed electrician must attach a cable lug to the power cable that you supply. A cable with an incorrectly attached lug can damage the router.

2. Route the power cable through the cable restraint.
3. Attach the lug on the DC source power cable to the terminal stud.
   1. Attach a positive (+) DC source power cable lug to the RETURN (return) terminals.
   2. Attach a negative (–) DC source power cable lug to the –48V (input) terminals.

   Secure the cable lug to the terminal stud, first with a washer, then with a nut (see Figure 1 and Figure 2). Use a 7/16-in. (11-mm) nut driver to tighten the nut. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each nut.

   Caution: You must use an appropriate torque-controlled tool to tighten the nuts. Applying excessive torque damages the terminal studs and the power supply. The absolute maximum torque that may be applied to this nut is 45 in-lb (5.0 Nm).

   Figure 1: Connecting a Power Cable to a Three-Input 240-A DC Power Supply

   

   Figure 2: Connecting a Power Cable to a Four-Input 240-A DC Power Supply

   

4. Tighten the cable restraint captive screw or screws to hold the power cable in place.
5. Replace the clear plastic cover over the terminal studs on the faceplate.
6. Verify that the DC source power cabling is correct, that the power cable is not touching or blocking access to router components, and it does not drape where people could trip on it.
7. Attach the other end of the power cable to the external DC power source.
8. Switch on the customer site circuit breakers.
9. Verify that the INPUT PRESENT LEDs on the power supply faceplate are lit steadily, indicating that the inputs are receiving voltage.
10. Switch the circuit breakers on the power supply to the ON position (|).

    Note: After a power supply is powered on, it can take up to 60 seconds for status indicators—such as the LEDs on the power supply, the command output displays, and messages on the LED display on the craft interface—to indicate that the power supply is functioning normally. Ignore error indicators that appear during the first 60 seconds.

11. Verify that the CB ON LEDs on the power supply faceplate are lit steadily, indicating that the circuit breakers are on..
12. Verify that the DC OK LED on the power supply faceplate is lit steadily, indicating that the power supply is correctly installed and is functioning properly. The DC OK LED blinks momentarily, then lights steadily.