Connecting Power to the Services Router

J2300 and J4300 Services Routers have a single fixed power supply. The J6300 Services Router has one or two field-replaceable power supplies. For more information about the J-series power specifications, see Power Guidelines, Requirements, and Specifications.

DC-powered J2300 Services Routers are intended for installation in a dedicated equipment room where they are accessible by trained personnel only. DC-powered J4300 and J6300 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.

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 screw and washer from the PEM nut 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 24, Figure 25, and Figure 26.
   5. Secure the cable lug to the grounding point, first with the washer, then with the screw.
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 24, Figure 25, and Figure 26.
   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 J6300 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.

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 screw and washer from the PEM nut 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 27, Figure 28, and Figure 29.
   5. Secure the cable lug to the grounding point, first with the washer, then with the screw.

   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: (For cable requirements, see DC Power, Connection, and Power Cable Specifications.)
   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 used 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.
   6. Using the other removed screw, secure the negative (–) DC source power cable lug to the –48 VDC terminal.
   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.