Juniper SRX 5600 Getting Started Manual page 17

Figure 10: Connect DC Power Cables
CAUTION: You must ensure that power connections maintain the proper polarity.
The power source cables might be labeled
is no standard color coding for DC power cables. The color coding used by the external
DC power source at your site determines the color coding for the leads on the power
cables that attach to the terminal studs on each power supply.
Ensure that the voltage across the DC power source cable leads is 0 V and that
1.
there is no chance that the cable leads might become active during installation.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and
2.
connect the strap to one of the ESD points on the chassis. For more information
about ESD, see the SRX 5600 Services Gateway Hardware Guide.
For each power supply:
3.
Switch the circuit breaker on the power supply faceplate to the
a.
( O ).
Remove the clear plastic cover protecting the terminal studs on the faceplate.
b.
Attach the positive (+) DC source power cable lug to the
c.
terminal.
Secure the power cable lugs to the terminal studs on the power supply, first
d.
with the split washer, then with the nut. Apply between 23 lb-in. (2.6 Nm)
and 25 lb-in. (2.8 Nm) of torque.
Attach the negative (–) DC source power cable lug to the
e.
terminal.
Step 5: Connect Ground and Power Cables
(+) and (–) to indicate their polarity. There
Step 5: Connect Ground and Power Cables
position
OFF
RTN (return)
(input)
–48V
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