Juniper ACX7348 - Page 91

Connect DC Power to an ACX7348 Router
Before you begin connecng DC power to the router:
• Ensure that you have taken the necessary precauons to prevent electrostac discharge (ESD)
damage (see Prevenon of Electrostac Discharge Damage).
• Ensure that you have connected the router chassis to earth ground.
CAUTION: Before you connect power to the router, a licensed electrician must aach
a cable lug to the grounding and power cables that you supply. A cable with an
incorrectly aached lug can damage the router (for example, by causing a short circuit).
To meet safety and electromagnec interference (EMI) requirements and to ensure
proper operaon, you must connect the chassis to earth ground before you connect it
to power. Under all circumstances, use the protecve grounding terminal on the router
chassis to connect to the earth ground.
• Install the PSM in the chassis.
Ensure that you have the following parts and tools available:
• Two DC power source cables. The ACX7348 supports a 6 AWG and 90 °C temperature-rated
stranded copper wire.
• An electrostac discharge (ESD) grounding wrist strap (not provided)
• Phillips (+) screwdriver, number 2 (not provided) for ghtening screws on the PSM terminals.
• Phillips (+) screwdriver, number 1 (not provided) for ghtening the terminal cover screws.
• Mulmeter (not provided)
The PSM in an ACX7348 router is a hot-removable and hot-insertable eld-replaceable unit (FRU). You
can remove and replace it without powering o the router or disrupng roung funcons.
To connect DC power to an ACX7348 router:
1. Wrap and fasten one end of the ESD grounding strap around your bare wrist. Connect the other
end of the strap to the ESD point on the chassis.
2. Switch o the dedicated customer-site circuit breakers. Ensure that the voltage across the DC
power source cable leads is 0 V and that there is no chance that the cable leads might become
acve during installaon.
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