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Installing the Cisco NCS 4216
Guidelines for DC-Powered Systems
Basic guidelines for DC-powered systems include the following:
• Each chassis power supply should have its own dedicated input power source. The source must comply
• The circuit must be protected by a dedicated two-pole circuit breaker. The circuit breaker should be
• The circuit breaker is considered the disconnect device and should be easily accessible.
• The system ground is the power supply and chassis ground.
• Do not connect the DC return wire to the system frame or to the system grounding equipment.
• Use the grounding lug to attach a wrist strap for ESD protection during servicing.
Installing the DC Power Supply
The sections describe how to install a DC power supply in the Cisco NCS 4216:
This equipment is suitable for installation in Network Telecommunications Facilities and locations where
Note
the NEC applies.
Note
This equipment is suitable for installations utilizing the Common Bonding Network (CBN).
The grounding architecture of this product is DC-Isolated (DC-I) for DC-powered products. DC-powered
Note
products have a nominal operating DC voltage of 48 VDC.
Installing the DC Power Supply Module
Perform the following procedure to install the power supply module:
with the safety extra-low voltage (SELV) requirements in the UL 60950, CSA 60950, EN 60950, and
IEC 60950 standards.
sized according to the power supply input rating and local or national code requirements.
Installing the DC Power Supply
Cisco NCS 4216 Hardware Installation Guide
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