Juniper Networks 8 Manuel d'utilisateur Page 140

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ERX 8.0.x Hardware Guide
ERX-7xx Models Specifications
Table 17: ERX-7xx Models Specifications
Category Specification
Weight
Weights are approximate.
Chassisonly 22lb(9.9kg)
Chassis fully configured 46 lb (20.7 kg)
Dimensions
10.5 (H) x 19 (W) x 16 (D) inches; 26.67 x 48.26 x 40.64 cm
Environmental Requirements
NEBS GR-63-CORE compliant
Ambient operating temperature
Long term: 4 to 104° F (5° to 40° C)
Short term: 23° to 122° F (–5° to 50° C)
Ambient operating humidity
Long term: 5% to 85% (noncondensing)
Short term: 5% to 95% (noncondensing)
Ambient storage temperature –40° to 158° F (–40° to +7 C), 95% relative humidity
Ambient storage humidity 5% to 95% (noncondensing)
Heat Dissipation
1400 W, 4780 BTU/hour maximum
DC Input
Voltage
–40 to –72 VDC
NOTE: If the voltage rises above –40 VDC, the system powers
off. The system does not power on again until the input
voltage re
aches –43 +/– 0.5 VDC.
Current 30 A @ –48 VDC
Power
1400 W maximum
Redundancy (input power) 2 independent line feeds
Space Requirements
3 feet (90 cm) behind router or rack
Do not block air vents on sides of the router.
Donotplaceequipmentthatexhaustshotairtoleft
on the right of the router.
Be aware that router exhausts hot air from its left side.
Airflow
Airflow d
irection is in through the right side and out
through the left side. See Figure 51.
122 ERX-7xx Models Specifications
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