MX204 DC Power System
MX204 Router DC Power Specifications
Table 1 lists the DC power system electrical specifications.
Table 1: DC Power System Electrical Specifications
Item | Specification |
|---|---|
DC input voltage | Operating range: –40 through –72 VDC |
DC system input current rating | 20 A @ –44 VDC (maximum) |
DC system input power | 331 W 7.75 A @ –44 VDC |
Table 2 lists the DC power supply electrical specifications.
Table 2: DC Power Supply Electrical Specifications
Item | Specification |
|---|---|
Maximum output power | 650 W |
DC input voltage | Minimum: –40 VDC Nominal: –48 VDC, –60 VDC Operating range: –40 to –72 VDC |
DC input current rating | 20 A @ –44 VDC |
DC Power Circuit Breaker Requirements for the MX204 Router
Each DC power supply has a single DC input (–48 VDC and return) that requires a dedicated circuit breaker. We recommend that you use a dedicated customer-site circuit breaker rated for 25 A (–48 VDC) minimum, or as required by local code. Doing so enables you to operate the router in any configuration without upgrading the power infrastructure.
If you plan to operate a DC-powered router at less than the maximum configuration and do not provision a 25 A (–48 VDC) circuit breaker, we recommend that you provision a dedicated customer-site circuit breaker for each DC power supply rated for at least 125 percent of the continuous current that the system draws at –48 VDC.
See also
DC Power Source Cabling for MX204 Router
The DC power supply in PS0 must be powered
by a dedicated power feed derived from feed A, and the DC power supply in PS1 must be powered
by a dedicated power feed derived from feed B. This configuration provides the commonly deployed A/B feed redundancy for the system.
You must ensure that power connections maintain the
proper polarity. The power source cables might be labeled (+) and (–) to indicate their
polarity. There 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.
For field-wiring connections, use copper conductors only.
Power cords and cables must not block access to device components or drape where people could trip on them.
See also
DC Power Cable Specifications for MX204 Router
DC Power Cable Lug Specifications
The accessory box shipped with the router includes the cable lugs that attach to the terminal of each power supply.
Before router installation begins, 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.
DC Power Cable Specifications
You must supply four DC power cables that meet the following specifications: 14-16 AWG (2.08 - 1.3 mm2), minimum 60° C wire, or as required by the local code.