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Connect DC Power to an ACX7348 Router
Before you begin connecting DC power to the router:
• Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD)
damage (see
Prevention of Electrostatic Discharge
• Ensure that you have connected the router chassis to earth ground.
CAUTION: Before you connect power to the router, a licensed electrician must attach
a cable lug to the grounding and power cables that you supply. A cable with an
incorrectly attached lug can damage the router (for example, by causing a short circuit).
To meet safety and electromagnetic interference (EMI) requirements and to ensure
proper operation, you must connect the chassis to earth ground before you connect it
to power. Under all circumstances, use the protective 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 electrostatic discharge (ESD) grounding wrist strap (not provided)
• Phillips (+) screwdriver, number 2 (not provided) for tightening screws on the PSM terminals.
• Phillips (+) screwdriver, number 1 (not provided) for tightening the terminal cover screws.
• Multimeter (not provided)
The PSM in an ACX7348 router is a hot-removable and hot-insertable field-replaceable unit (FRU). You
can remove and replace it without powering off the router or disrupting routing functions.
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 off 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
active during installation.
Damage).
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