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MIL-STD-461 Test Results
Plots showing Conducted and Radiated Emissions
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RS255 - 2U Rugged Server
 · MEETS MIL-STD 810F/G, 167-1, 461E/F and
MIL-S-901D
· Five expansion slots
· Five HDD
· 20" depth
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The RS255 (rugged 2U server with short depth) offers extended capability with shock/vibe rating of 4.43 GRMS in combined wheeled vehicle and aircraft profiles, a temperature range of –40oC up to 71oC (-40 to160oF) and multiple power options.
The RS255 is available with Intel® CPU Architecture dual Dual Core or dual Quad Core processor options - Socket 771 and Socket 1366 (Intel Harpertown and Nehalem-EP) CPUs. Expansion choices in this short depth (20 inches) rugged server include five (5) low profile slots with combinations being configuration dependent for greater adaptability. Up to ten drives and a slimline CD/DVD are available. The drives are removable and hot swappable.
All Crystal products are designed and being tested to meet MIL-STDs 810F, 167-1, 461E/F, and 901D requirements. As always, each Crystal product comes with a standard three-year warranty. On-site, next day and extended warranties are available. Configuration Management is also available upon request.
RS255 - 2U Rugged Server
Key Features
Rugged 2U in a 19” Rack or Transit Case
EIA 2U Form Factor, Short Depth, 20”
Light Weight, 30-35 lbs depending on content
Socket 771 and Socket 1366 (Intel Harpertown and Nehalem-EP) CPUs available
Five (5) low profile slots; combinations are configuration dependent.
Extended temperature range, -15°C to +55°C, -40°C optional SSHDD, +71°C option with higher temp CPU
Kits available for MIL-STD-810F/G vibration, MIL-STD-810F humidity, MIL-STD-810F/G shock, MIL-S-901D shock, MIL-STD-167-1 vibration, MIL-STD-461E/F EMC
Configuration Management available upon request; Designed for long-life thru Intel® Roadmap partner
Front mounted with Delrin glides, fixed mount or Jonathan rails
Rugged Series Structural Features
All aluminum construction
6061T-651 strain hardened structural aircraft aluminum
0.187 to 0.500” thk. aluminum cross-sections, machined
MIL-C-5541E Class 3 chem film protection
Built to Survive Shock and Vibe
Multiple attachment points on motherboard and CPU heatsink stabilize PWB
All fasteners and connectors retained with locking mechanisms
Cabling dressed and secured to prevent chaffing
Five (5) removable HDDs, shock isolated
Superior Cooling and EMI Performance
Cooling
High speed, high volume, thermostatically controlled fans offer maximum airflow and are designed for long life
Custom cabling reduces internal pressure drop to increase airflow
Conduction and convection cooling techniques optimized for each CPU design
EMI/EMC
Passed EMC, MIL-STD-461F, CE102 and RE102 testing with significant margin using Crystal designed 461 kit
Internal compartments segregated to isolate EMI emissions
Finish applied maintains superior EMI/EMC characteristics throughout life of the unit.
Superior grounding paths
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Military Standards (*designed to or tested to)
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Operational Temperature, MIL-STD-810F, Method 501.5, Procedure I/II
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-15°C to +55°C,
+71°C Option with higher temp CPU,
-40°C with Solid State Drive
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Storage, MIL-STD-810F, Method 501.5, Procedure I/II
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-55°C to 85°C
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Humidity, MIL-STD-810F, Method 507.4
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48 Hour, 95% RH 40-65C— w/humidity kit
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Altitude, MIL-STD-810F, Method 500.4
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12,500ft operation, 40,000ft transport
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Vibration, MIL-STD-810G, Method 514.6, Procedure I
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4.43 GRMS, 5-500Hz, 75 min/axis— w/vibe kit (and SSHDD)
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| Shock, MIL-STD-810G, Method 516.6, Procedures I/V |
20g, 11msec—functional shock; 40g, 11msec crash hazard shock |
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MIL-S-901D, Grade B, Class 2, Type B
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Grade A with solid state drives + vibe kits
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EMC, MIL-STD-461F, CE102 (conducted) & RE102 (radiated) emissions
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Passed with significant margin using Crystal designed 461 kit
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Mechanical (2U)
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| Height |
3.5” (8.89cm) |
| Width |
17.75” (45.1cm) |
| Depth |
20.125” (51.12cm) |
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Weight
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30-35 lbs (13.6-15.9 kg) (excludes vibe kit mods)
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CPU
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Intel® CPU architecture options from Intel embedded long-life roadmap
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Dual Dual Core or dual Quad Core options
Harpertown and Nehalem-EP
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Expansion Slots (5)
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Option 1
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Five (5) low profile slots; combinations are configuration dependent.
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External Bays (5)
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| Option 1 (std) |
Five (5) Removable SATA or SAS 2.5” or 3.5” HDD |
| Option 2 |
Ten (10) 2.5” rugged drives mounted in pairs |
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Option 3
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One (1) CD/DVD (R/W) or Blu-ray
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Cooling
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Option 1 (std)
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High Speed, High Volume Fans (6 + 2 PS)
Thermostatically Controlled
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Mounting Options
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Option 1 (std)
Option 2
Option 3
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Mounted on Delrin glides
Fixed Mount, front and rear
Jonathan Rails
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Power Supply Options
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Option 1 (std)
Option 2
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120/240VAC w/PFC
24VDC
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System Board
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| Option 1 |
X7DVL-E, Socket 771, 1333MHz FSB, 2-24GB FBD ECC DDR2, PS/2 KB/M, DB9 Serial, VGA, 2-USB, 2-GBLAN |
| Option 2 |
X7DAL-E, Socket 771, 1333MHZ FSB, 2-24GB FBD ECC DDR2, PS/2 KB/M 2-DB9 Serial, 4-USB, 2-GBLAN, Audio-in, out, Mic (requires off-board video) |
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Option 3
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X8DTL-3F, Socket 1366, 2-48 GB ECC Reg. DDR3, PS/2 KB/M, DB9 Serial, VGA, 2-USB, 2-GBLAN, On-board SAS, IPMI w/ KVM over IP
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* Crystal Group designs all servers to meet or exceed the specifications listed herein. Due to the sheer number of models and combinations of components (memory, CPU, peripheral cards, hard drives), it is not practical to test every combination of servers offered. Please ask your Crystal Business Development Manager for data on qualification testing for configurations similar to the desired configuration for your application
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