Cisco Systems AS5800 manual DC PEM Specifications

System Specifications

Table A-7 Dial Shelf Controller Card Environmental Specifications (continued)

Description	Specification
Humidity
Operating	10 to 90%, noncondensing
Nonoperating	10 to 95%, noncondensing
Altitude
Operating	9,843 ft (3,000 m) at 104° F (40° C)
Nonoperating	15,000 ft (4,570 m) over allowable
	temperature range
Thermal shock
Operating	23 to 113° F (–5 to 45° C at 0.5° C) per
	minute
Nonoperating	–13 to 158° F (–25 to 70° C) with
	change-over time between 2 and 3 minutes
Vibration
Operating	1.12 Grms from 3 to 500 Hz
Nonoperating	2 Grms from 3 to 500 Hz
Ripple and noise	200 mV
Battery feed noise	3kHz band between 10KHz and 20 MHz
Voice frequency noise	70 dBrnC
Radio frequency noise	500 mV RMS
Long-term voltage drift	± –0.5%

DC PEM Specifications

The PEMs provide –48 VDC power, which is distributed through the filter module to the dial shelf backplane. The analog isolators in the filter module are provided with 15 VDC. The PEMs suffer no damage if any or all outputs have no load (no load occurs when there are no cards plugged into the backplane) or if the maximum input voltage is exceeded; however, input voltages that exceed 75 V eventually trip the PEM 60 A circuit breaker, and you might have to reset the breaker as needed.

Table A-8lists DC output voltage and current specifications.

Table A-8 Power Entry Module Power Specifications

Power	Description
Voltage to backplane
Maximum	–38 VDC
Nominal	–48 VDC
Minimum	–75 VDC
Current
Minimum (SS)	3 A
Nominal (SS)	42 A
Maximum (SS)	54 A
Peak (2 sec)	60 A
Circuit breaker	50A

A-6Cisco AS5800 Universal Access Server Hardware Installation Guide