SRX3400 Services Gateway DC Power Supply Electrical Specifications

Two types of DC power supply are available. The standard DC power supply has a maximum power output of 850 W. The enhanced DC power supply has a maximum power output of 1200 W, and also has additional filters required to meet NEBS and ETSI requirements. The two types of DC power supply are identical in all other respects. Each DC power supply has a single DC input (-48 VDC and return) that requires a dedicated 40 A (-48 VDC) circuit breaker. Table 22 lists the DC power supply electrical specifications.

Table 22: DC Power Supply Electrical Specifications

Item

Standard DC Power Supply

Enhanced DC Power Supply

Maximum output power

850 W

1200 W

DC input voltage

–40.5 to –72 VDC

–40.5 to –72 VDC

DC input current rating

22.2 A @ -48 VDC

31.3 A @ -48 VDC

Note: Mixing standard and enhanced DC power supplies within the same chassis is not supported. All installed DC power supplies must be either of standard or enhanced types.

Each DC power supply faceplate displays a single LED to indicate the status of the power supply (see Table 23).

Table 23: DC Power Supply LED

Color

LED Status

Indicated Condition

Green

On steadily

DC input voltage is present, and both main 12V output and standby 3.3V output are enabled and healthy.

Blinking

DC input voltage is present, standby 3.3V output is on, but the main 12V output is disabled. This condition usually indicates that the services gateway has been powered off at the Power button on the SFB front panel. It may also indicate that either the SFB or Routing Engine has been removed from the services gateway.

Red

On steadily

The power supply has detected one or more of the following faults:

  • Power supply fan failure
  • Power supply over-temperature condition
  • Over-current or under-voltage condition on the standby 3.3V output

Blinking

The power supply has detected one or more of the following faults:

  • Under-voltage condition on the 12V output
  • Over-voltage condition on the 12V output
  • Over-current condition on the 12V output

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