A P P E N D I X A

System Specifications

This appendix gives the system specifications for the Netra CT 820 server.

Electrical Specifications


Parameter	Conditions/Description	MIN	NOM	MAX	Units
Input Voltage -DC	Continuous input range	36		75	VDC
Hold-up Time	From 48 VDC input	4			ms
Input Current	At full rated load; 36 VDC, 48VDC		7.6, 5.4		A
Input Protection	Non-user serviceable, internally-located input line fuse
Inrush Surge Current	Internally limited by thermistor and electronic switch			12	A
Operating Frequency	Switching frequency of main output transformer	125		145	KHz
Input Transient Protection	Varistor

Environmental Specifications

The Netra CT 820 server is designed for harsh environments. The chassis features sturdy steel and aluminum construction with a corrosion resistant finish.

Due to the modular construction of the system, components could be added that change the system's environmental constraints. Board-level components and power supply modules have their own operating temperature ratings. Refer to component-specific product manuals for operational details that may affect system performance.

TABLE A-2 summarizes the environmental specifications for the Netra CT 820 server. The source of these specifications is NEBS GR-63-CORE. Systems were subjected to these environments and passed all testing.


Parameter	Description
Temperature - Operating	-0° C to 40° C (32° F to 104° F)
Temperature - Operating, short-term (per NEBS GR-63-CORE)	-5° C to 55° C (23° F to 131° F)
Temperature - Non-Operating	-40° C to 70° C (-40° F to 158° F)
Humidity - Non-Operating	90% noncondensing relative humidity at @ 30° C
Shock - Unpackaged	Up to 110.2 lbs: 2 inch drop Over 110.2 lbs: 1 inch drop
Shock - Packaged	< 450 lbs: 11.8 inch drop (category B, palletized)
Vibration - Unpackaged	5 Hz to 100 Hz, at 0.1 g sine
Vibration - Packaged	5 to 100 Hz at 0.5 g sine and 100 to 500 Hz at 1.5 g sine