Juniper JSA5800 Hardware Manual page 39

• Ensure that you have connected the JSA5800 appliance chassis to earth ground.
Required tools and parts:
• DC power source cables (12-14 AWG) with ends of the wire stripped ~12 mm and twisted
• Phillips (+) screwdriver, number 1
CAUTION: Before you connect power to the JSA5800 appliance, attach the ground
wire in one of the below configurations to meet the safety requirements and to ensure
proper operation:
• Both power supply ground terminals
• One or both of the chassis ground terminal(s) located to the left of the power supply
modules
• Both power supply ground terminals and one or both chassis ground terminals
You connect a DC power source to the JSA5800 appliance by attaching power cables from the external
DC power sources to the terminal studs on the DC power feed faceplates.
WARNING: DC-powered JSA appliances are intended for installation only in restricted
access locations.
WARNING: Before you perform the following procedure, 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.
To connect the DC source power to the JSA5800 appliance:
1. Ensure that the input circuit breaker is open so that the voltage across the DC power source cable
leads is 0 V, and so that the cable leads will not become active while you are connecting DC power.
2. Connect the black wire to the -48 V terminal block and red wire to the RTN terminal block on the
back panel of the JSA5800 appliance.
3. Use the terminal screws to secure the power source cables to the power feed on the JSA5800
appliance.
4. Attach the plastic safety cover.
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