SSU-2000 Shelf Specifications
438 SSU-2000 User’s Guide 12713020-002-2 Revision D – April 2004
Distribution Capacity
Main Shelf Up to 9 DS1/E1 output modules in Main Shelf
20 outputs per output module
SDU-2000 Expansion Up to 4 Expansion Shelves
Up to 14 output modules per expansion shelf with 20 outputs per
module
Maximum of 1120 outputs in 4 expansion shelves
Alarm Closures
MINOR Contact closure (NC or NO) 1 Amp Form C
MAJOR Contact closure (NC or NO) 1 Amp Form C
CRITICAL Contact closure (NC or NO) 1 Amp Form C
Chassis Power and Grounds
Power Connections A & B Input connections at opposite upper sides of the rear panel
DC –38 to –72.5 vDC, (–48 vDC nominal)
DC Power @ -48 vDC < 240 watts, per chassis
Fuse Type/Rating 2 fuses; GMT-5A
Grounds –48V return DC, isolated from frame and logic grounds.
Chassis Mechanical
Width 17 inches (43.2 cm)
Depth 11.5 inches (29.2 cm)
Height 10.5 inches (26.7 cm)
Weight (provisioned) ~ 27 lbs (12.3 kg)
Chassis Environmental
Temperature
Operational Stratum Levels
+1.7C to +49C @ 8.3C max rate of change per hour
GR-1244-CORE Sec. 2.2
Relative Humidity
Operational
5% to 85% Non-condensing
GR-63-CORE Sec. 4.1.2 ETS 300 019-1 Class 3.1
Temperature
Operational Short Term
Non-Stratum performance
–5C to +50C @ 30C max per hour rate of change.
Duration <96 hours
GR-63-CORE Sec. 4.1.2 ETS 300 019-1 Class 3.1
Relative Humidity
Operational Short Term
5% to 90% Non-condensing. Duration <96 hours
GR-63-CORE Sec. 4.1.2 ETS 300 019-1 Class 3.1
Table F-1. General Specifications (Continued)
Characteristics Specification
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