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Cisco PIX Security Appliance Hardware Installation Guide
78-15170-03
Chapter 7 PIX535
Installing the PIX 535 DC Model
Step 3 Terminate the DC input wiring on a DC source capable of supplying at least 15 amps. A 15-amp circuit
breaker is required at the -48 VDC facility power source. An easily accessible disconnect device should
be incorporated into the facility wiring.
Step 4 Be sure the PIX 535 power is off by checking the power switch at the rear of the unit.
Step 5 As shown in Figure 7-16, the PIX 535 is equipped with two grounding holes at the back of the unit,
which you can use to connect a two-hole grounding lug to the PIX 535. Use M3.5 x 7 mm thread-forming
screws to connect a copper standard barrel grounding lug to the holes. The PIX 535 requires a grounding
lug where the distance between the center of each hole is 0.56 inches. A grounding lug is not supplied
with the PIX 535.
Figure 7-16 Attaching a Grounding Lug to the PIX 535 DC
Step 6 Ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit
breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position,
and tape the switch handle of the circuit breaker in the OFF position.
Step 7
Strip the ends of the wires for insertion into the power connect lugs, located to the left of the power switch.
Step 8 Refer to Figure 7-17 and insert the ground wire into the connector for the earth ground and tighten the
screw on the connector. Using the same method as for the ground wire, connect the negative wire and
then the positive wire.
Figure 7-17 Attaching DC Power Cables
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Chassis grounding receptacles
Grounding wire
Grounding lug
Screws
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