Connect Earth Ground to ACX7509 Routers

date_range 08-Mar-22

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To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the ACX7509 router to an earth ground before you connect it to power.

You must install the ACX7509 router in a restricted-access location and ensure that the chassis is always properly grounded. The ACX7509 router has a two-hole protective grounding terminal on the chassis. Always use this grounding connection to ground the chassis. For AC-powered systems, you must 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 electromagnetic compatibility (EMC) regulatory requirements with the two-hole protective grounding terminal.

Before you connect an earth ground to the protective earthing terminal of an ACX7509 router, ensure that a licensed electrician has attached an appropriate grounding lug to the grounding cable.

CAUTION:

Using a grounding cable with an incorrectly attached lug can damage the ACX7509 router.

Note:

An AC-powered ACX7509 router chassis gains additional grounding when you plug the power supply into a grounded AC power outlet by using an AC power cord appropriate for your geographical location.

Before connecting the router to an earth ground, ensure that you have the following parts and tools available:

An electrostatic discharge (ESD) grounding strap (provided).
Protective earthing terminal lug (provided).
Grounding cable for your router—The grounding cable must be 4 AWG (21.2 mm²) stranded wire should be rated 90° C or per local electrical code.
Grounding lug for your grounding cable (not provided)—This bracket attaches to the lower left corner of the router chassis next to the bottom power supply, providing a protective earthing terminal for the router. The grounding lug required is a Panduit LCD6-14A-L or equivalent.
A Phillips screwdriver (not provided) to tighten the two screws that are mounted on the chassis.

The Panduit LCD4-14A-L terminal lugs, or equivalent are sized for 4 AWG (21.1 mm2) power source cables. The 4 AWG (21.1 mm²) stranded wire should be rated 90° C or per local electrical code. We recommend that you install heat-shrink tubing insulation around the crimped section of the power cables and lugs.

To ground the ACX7509 router:

Verify that a licensed electrician has attached the cable lug provided with the router to the grounding cable.
Ensure that all grounding surfaces are clean and shiny before making the grounding connections.
Connect the grounding cable to a proper earth ground, such as the rack in which the router is mounted.
Wrap and fasten one end of the ESD grounding strap around your bare wrist and connect the other end of the strap to one of the ESD points on the chassis. See Figure 1.
Figure 1: ESD Point on the Rear of the Chassis

1
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ESD point
Remove the two M6 screws with attached washers on the chassis using a Phillips screwdriver.
Place the chassis grounding lug and cable over the screw holes with the cable connection pointing to the left.
Place the two screws with attached washers over the grounding lug and grounding cable.
Secure the grounding cable lug with the M6 screws attached with washers. See Connect Earth Ground to ACX7509 Routers
Figure 2: Connect a Grounding Cable to the ACX7509 Router
Verify that the grounding cable does not touch or block access to router components, and make sure that it does not trail across the floor where people could trip over it.

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Connect Earth Ground to ACX7509 Routers

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