Maintenance Safety
Summit X440 Series Switches Installation Note
7
To ground the switch:
1
Identify the grounding lug on the back of the switch. The grounding lug is is the middle screw of the
power connector panel, identified by the international symbol for earth ground. (see
).
Figure 3: Location of the Grounding Lug on the power connector panel
2
Insert the spade terminal of the ground wire underneath the grounding lug (see
Figure 4: Attaching the Ground Wire to a Summit X440 DC Series Switch
3
Using a straight-tip torque screwdriver, tighten the retaining screw to 20 pound-inches
(2.25 Newton-meters).
4
Connect the other end of the wire to a known reliable earth ground point at your site.
Connecting the DC Power Cables on the Summit X440-24tDC and X440-48tDC
Switch to a -48V power source
To connect the DC power cables to the Summit X440 DC powered switches:
1
Verify that the DC circuit is de-energized.
2
Connect the DC power input cables as follows:
-48V
1
1=Grounding lug
1
-48 ~ -72V
2
1=Grounding lug
2=Tighten with screwdriver
