Connecting Power

J4350 Services Routers have a single fixed power supply. J6350 Services Routers have one or two field-replaceable power supplies. For more information about the J-series power specifications, see Power Guidelines, Requirements, and Specifications.

DC-powered Services Routers are intended for installation only in a restricted access location.

Connecting AC Power

The router must be connected to earth ground during normal operation. The protective earthing terminal on the rear of the chassis is provided to connect the router to ground. Additional grounding is provided to an AC-powered router when you plug its power supply into a grounded AC power receptacle.

The AC power cord shipped with the router connects the router to earth ground when plugged into an AC grounding-type power outlet. The router must be connected to earth ground during normal operation.

For power cord requirements, see AC Power, Connection, and Power Cord Specifications

To connect AC power to the router:

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strip to the ESD point on the chassis. For more information about ESD, see Preventing Electrostatic Discharge Damage.
2. Use a grounding cable to connect the router to earth ground: (For cable requirements, see Chassis Grounding.)
   1. Verify that a licensed electrician has attached an appropriate grounding cable lug to the grounding cable.
   2. Connect one end of the grounding cable to a proper earth ground, such as the rack in which the router is installed.
   3. With a Phillips screwdriver, remove the screws and washers from the PEM nuts at the grounding point on the rear of the chassis.
   4. Place the grounding lug at the other end of the cable over the grounding point, as shown in Figure 37.
   5. Secure the cable lug to the grounding point, first with the washers, then with the screws.
3. Locate the power cord or cords shipped with the router, which has a plug appropriate for your geographical location. For power cord specifications, see Power Guidelines, Requirements, and Specifications.
4. For each power supply:
   1. Insert the appliance coupler end of a power cord into the appliance inlet on the power supply faceplate, as shown in Figure 37.
   2. Insert the plug into an AC power source receptacle.
5. Verify that the power cord does not block access to router components or drape where people can trip on it.

Connecting DC Power

If your J6350 Services Router includes an optional redundant DC power supply, connect each of the two power supplies to different input power sources. Failure to do so makes the router susceptible to total power failure if one of the power supplies fails.

The router must be connected to earth ground during normal operation. The protective earthing terminal on the rear of the chassis is provided to connect the router to ground.

For DC cable requirements, see DC Power, Connection, and Power Cable Specifications.

To connect DC power to the router:

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strip to the ESD point on the chassis. For more information about ESD, see Preventing Electrostatic Discharge Damage.
2. Use a grounding cable to connect the router to earth ground: (For cable requirements, see Chassis Grounding.)
   1. Verify that a licensed electrician has attached an appropriate grounding cable lug to the grounding cable.
   2. Connect one end of the grounding cable to a proper earth ground, such as the rack in which the router is installed.
   3. With a Phillips screwdriver, remove the screws and washers from the PEM nuts at the grounding point on the rear of the chassis.
   4. Place the grounding lug at the other end of the cable over the grounding point, as shown in Figure 38.
   5. Secure the cable lug to the grounding point, first with the washers, then with the screws.

   A DC power supply in a Services Router becomes grounded when you connect a grounding cable between the router and earth ground.

3. For each power supply:
   1. Ensure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cable leads might become active during installation.

      There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the terminal studs on each power supply. You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and (–) to indicate their polarity.

   2. Verify that a licensed electrician has attached the appropriate power cable lugs to the negative and positive DC source power cables.
   3. Use a Phillips screwdriver to remove the clear plastic cover protecting the terminal block.
   4. Within the terminal block, remove the two center screws next to the labels –48 VDC and RTN.

      Each screw contains a captive washer to secure a DC source power cable lug to the terminal block.

   5. Using one of the removed screws, secure the positive (+) DC source power cable lug to the RTN terminal. Tighten the screw until snug. Do not overtighten. Apply between 8 lb-in. (0.9 Nm) and 9 lb-in. (1.02 Nm) of torque to the screw.
   6. Using the other removed screw, secure the negative (–) DC source power cable lug to the –48 VDC terminal. Tighten the screw until snug. Do not overtighten. Apply between 8 lb-in. (0.9 Nm) and 9 lb-in. (1.02 Nm) of torque to the screw.
   7. Dress the power cables appropriately.
   8. Replace the clear plastic cover over the terminal block.
4. Verify that the power cables do not block access to router components or drape where people can trip on them.