SRX5800 Services Gateway Chassis Grounding Specifications

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, the services gateway must be adequately grounded before power is connected. To ground AC-powered and DC-powered services gateways, you must connect a grounding cable to earth ground and then attach it to the chassis grounding points (see Figure 1 or Figure 2).

Figure 1: Grounding Point on an AC-powered Services Gateway

Figure 2: Grounding Point on a DC-powered Services Gateway

To ground AC-powered and DC-powered services gateways, connect a grounding cable to earth ground and then attach it to the chassis grounding points using two screws. The left pair of grounding points fits M6 screws (European), and the right pair fits UNC 1/4–20 screws (English). The grounding points are spaced at 0.625-in. (15.86-mm) centers. The accessory box shipped with the services gateway includes the cable lug that attaches to the grounding cable and two UNC 1/4–20 screws used to secure the grounding cable to the right pair of grounding points.

Warning: The services gateway is a pluggable type A equipment installed in restricted access location. It has a separate protective earthing terminal (Metric -M6 and English - ¼-20 screw ground lugs) provided on the chassis in addition to the grounding pin of the power supply cord. This separate protective earth terminal must be permanently connected to earth.

The 48 VDC facility shall be equipped with a circuit breaker rated 40 A (–48 VDC), or 60 A (–48 VDC), and the grounding cable must be minimum 10 AWG, or as required by the local code.

Note: Additional grounding is provided to an AC-powered services gateway when you plug its power supplies into grounded AC power receptacles.

Warning: The services gateway is installed in a restricted-access location. It has a separate protective earthing terminal (Metric [M6] and English [¼-20] screw ground lugs) provided on the chassis in addition to the grounding pin of the power supply cord. This separate protective earth terminal must be permanently connected to earth.