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DC Power Supply Input Fuses
The DC PSM has a power supply input fuse in the negative terminals of both INP0 and INP1.
Table 43 on page 119
lists the electrical specification for this fuse.
Table 43: Electrical Specifications for the DC Power Supply (240 V China) Input Fuse
Electrical Characteristic
Fuse
Voltage Rating
Ampere Range
Interrupting Rating
Approvals
Construction
Environmental
DC Power (-48 V) Circuit Breaker Requirements for the MX2008 Router
NOTE:
The MX2008, MX2010, and MX2020 routers support the same power modules (AC/DC
PSMs and AC/DC PDMs).
For PDMs, if you plan to operate a maximally configured DC-powered router, we recommend that you
provision at least 80 A @ –48 VDC (nominal) for each DC input to the system. Use a customer-site circuit
breaker rated according to respective National Electrical Code and customer site internal standards to
maintain proper level of protection for the current specified above.
If you plan to operate a DC-powered router at less than the maximum configuration, we recommend that
you provision a circuit breaker according to respective National Electrical Code and customer-site internal
standards to maintain proper level of protection for the current specified above.
For PDMs, If you plan to operate a minimally configured DC-powered router, we recommend that you
provision at least 60 A @ –48 VDC (nominal) for each input to the system. Use a customer-site circuit
Value
Fuse Walter MHP-20
500 Vdc
20 A
20 kA
UL Recognized (File: E71611)
Body: Glass melamine
Caps: Silver-plated brass
RoHS Compliant, Lead (Pb) Free
119
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