6-27
Cisco PIX Security Appliance Hardware Installation Guide
78-15170-03
Chapter 6 PIX 525
Installing a DC Power Supply
Figure 6-28 Inserting Cable Clamp to the Fan
Step 9
Reconnect the two-pin fan cables to the remaining fan, as shown in
. Fan wiring colors are
listed in
Step 10
Route the fan wire on the top surface of the fans. Place the fan wires straight, and do not twist the wires
together. Locate the connectors in the gap between the fans. (See
Step 11
Starting with the fan farthest away from the power supply, bend the cable clamps over the wires and into
the gap between the chassis and fan housing.
Step 12
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 13
Be sure the PIX 525 power is off by checking the power switch at the rear of the unit.
Step 14
As shown in
, the PIX 525 is equipped with two grounding studs at the back of the unit,
which you can use to connect a two-hole grounding lug to the PIX 525. Use the 10-32 nuts provided with
the PIX 525 to connect a copper standard barrel grounding lug to the studs. The PIX 525 requires a lug
where the distance between the center of each hole is 0.56 inches. A lug is not supplied with the PIX 525.
Table 6-4
Fan Wiring Colors
Fan Number
Wire Colors
1 (closest to power supply)
Purple and black
2
Green and black
3
Blue and black
4 (farthest away from power
supply)
Brown and black
Front panel
31335
Wiring clamp
