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Connect ACX710 to Power

Connect Earth Ground to ACX710 Routers

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, the router must be adequately grounded before power is connected.

You need a protective earthing terminal bracket for connecting the chassis to earth ground. This two-holed bracket is attached on the side of the chassis through the mounting rail, and provides a protective earthing terminal for the router. The grounding points are in the form of studs that are sized for M6 Torx screws. (You need to provide these screws with integrated washers as we do not ship them in the accessory kit).

You must install the ACX710 in a restricted-access location and ensure that the chassis is always properly grounded. The ACX710 has a two-hole protective grounding terminal provided on the chassis. See Figure 1. Under all circumstances, use this grounding connection to ground the chassis. For AC-powered systems, you must also use the grounding wire in the AC power cord along with the two-hole grounding lug connection. This tested system meets or exceeds all applicable EMC regulatory requirements with the two-hole protective grounding terminal.

To ground the ACX710 router:

  1. Verify that a licensed electrician has attached the cable lug provided with the router to the grounding cable.
  2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the other end of the strap to an approved site ESD grounding point. See the instructions for your site.
  3. Ensure that all grounding surfaces are clean and are brought to a bright finish before you make grounding connections.
  4. Connect the grounding cable to a proper earth ground.
  5. Place the grounding cable lug over the grounding points on the side of the chassis (see Figure 1).
    Figure 1: Connect the Grounding Cable to the ACX710 RouterConnect the Grounding Cable to the ACX710 Router
  6. Secure the grounding cable lug with the screws.
  7. Dress the grounding cable, and verify that it does not touch or block access to router components, and that it does not drape where people could trip on it.
Note:

  • Bare connectors and all grounding surfaces must be brought to a bright finish and coated with an antioxidant before crimp connections are made.

  • Non-conductive coatings on equipment that is to be bonded or grounded should be removed from threads and other contact surfaces to assure electrical continuity. To screw the box to its rack, use the thread-forming type unit mounting screws that remove any paint or non-conductive coatings to establish metal-to-metal contact.

DC Power Cabling

Before you connect the DC power cable, you must ensure that the polarity of the DC power cable installation is correct.

Figure 2, Figure 3, and Figure 4 show the DC power cabling styles for an ACX710 router.

Figure 2: DC Power Cable Style 1 DC Power Cable Style 1

Table 1 lists the DC power cables that follow the DC 3-wire power cable style 1.

Table 1: DC Power Cables for Power Cable Style 1
Juniper Part Number Power Cable Assembly
  Length Gauge

ACX700DC310  

10000 mm

14 AWG

ACX700DC32

 

2500 mm

14 AWG

ACX700DC35

5000 mm

14 AWG
Figure 3: DC Power Cable Style 2 DC Power Cable Style 2

Table 2 lists the DC power cable that follows DC 2-wire power cable style 2.

Table 2: DC Power Cable for Power Cable Style 2
Juniper Part Number Power Cable Assembly
  Length Gauge

ACX700DC21 

1800 mm

14 AWG
Figure 4: DC Power Cable Style 3 DC Power Cable Style 3

Table 3 lists the DC power cables that follow power cable style 3.

Table 3: DC Power Cables for Power Cable Style 3
Juniper Part Number Power Cable Assembly
  Length Gauge

ACX700DC22 

2500 mm

14 AWG

ACX700DC210 

10000 mm

14 AWG

ACX700DC25 

5000 mm

14 AWG

For DC-I (three-wire) power cable style 1, if PE is connected to –48 V DC at DC power sources, it will cause a short circuit and the circuit breaker on the DC power sources will be tripped.

For DC-C (two-wire) power cable style 3, if the –48 V DC return is connected to –48 V DC at DC power sources, it will cause a short circuit and the circuit breaker on the DC power source will be tripped.

Connect DC Power to an ACX710 Router

Before you begin connecting DC power to the router:

  • Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

  • Ensure that you have connected the router chassis to earth ground.

    CAUTION:

    Before you connect power to the router, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the router (for example, by causing a short circuit).

    To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the chassis to earth ground before you connect the chassis to power.

  • Ensure that you have the following parts and tools available:

    • DC power source cables

    • Multimeter (not provided)

To connect DC power to an ACX710 router:

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to the site ESD point.
  2. Power off the DC input appliance inlet on the source power supply.
  3. Connect the power cord to the power source outlet.
  4. Insert the power cord firmly into the inlet.
    Figure 5: Connect a DC Power Cord to an ACX710 RouterConnect a DC Power Cord to an ACX710 Router
  5. Route the power cord appropriately. Verify that the power cord does not block the air exhaust or access to router components, or drape where people could trip over it.
  6. Power on the source power supply.

See Also