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6U Conduction-Cooled Mechanical Housing Assembly (MHA)
Qualification Test Report

PDF print version of this specification

The 6U Conduction-Cooled Mechanical Housing Assembly (6U CC MHA) is a versatile, rugged enclosure for 6U Single Board Computer (SBC) based embedded systems, as used in varied Airborne, Vehicular and Naval applications. The MHA can be configured for use with standard 6U CompactPCI, VME, VPX or other custom backplanes.

The 6U CC MHA has dual-redundant hot-swap power supplies, connected in a load-sharing topology, capable of operating from a wide AC input range and supplying standard DC output rails. On-board power line filtering is implemented to limit susceptibility to EMI and RFI.

The modular rear-I/O connector plate can easily be customised to suit any end application. Resilience to shock and vibration can be enhanced using external shockmounts.

The 6U CC MHA is designed for highest levels of resilience to mechanical shock, vibration, temperature, dust and salt fog.


  • Support for various 6U backplanes (CompactPCI, VME, VPX, custom)

  • Two to eight CompactPCI or VME card slots in the standard configuration

  • Rugged, lightweight aliminium construction

  • Optional dual-redundant power supplies

  • Optional external shockmounts

  • Conduction cooling

  • Optional forced-air cooling

  • Rugged and reliable military circular connectors

6U CC MHA with open lid

6U CC MHA with open lid

6U CC MHA with fan cooling

6U CC MHA with fan cooling

6U CC MHA without fan cooling

6U CC MHA without fan cooling

Mechanical Construction Aliminium Construction
Freestanding (with or without shockmounts)
Rear mounted handles
Card Space Inner card cage
Two to eight 6U card slot backplane
Support for hot swap
Vertical card orientation
Conduction-cooled cards
Thermal Management Conduction cooling via finned side panels
Optional forced-air cooling with fans
Backplane Type Standard (CompactPCI, VME, VPX) and custom 6U options
Power Supply Dual-redundant hot swap power supplies (application specific rating) EMI / RFI power line filtering
I/O Interface Fully customisable rear I/O area 210 mm x 235 mm (height x width)
Switches and Indicators Optional front and rear panel switches and indicators :
  • Power Switch
  • Battleshort Switch
  • BIT Status Indicators
Surface Finish Black anodised aliminium
IP Rating IP-65 (IEC-60529)
Acoustic Noise 0 dB without fan cooling
34 dB with fan cooling
Maximum Power Dissipation
Baseplate Temperature20 C30 C40 C50 C60 C70 C
Power Dissipation without fan cooling360 W320 W270 W220 W170 W120 W
Power Dissipation with fan cooling430 W370 W310 W240 W180 W120 W

Physical Dimensions (height x width x depth) Mass
Conduction-Cooled 260 mm x 350 mm x 340 mm 17,0 kg +- 1,0 kg
Air Cooled 260 mm x 350 mm x 440 mm 17,5 kg +- 1,0 kg

Environmental Specifications
Grade Industrial Ruggedised
- Operating
- Storage
-15 C to +75 C
-50 C to +85 C
-40 C to +85 C
-60 C to +125 C
Relative Humidity 0% to 100% 0% to 100%
Shock 60 g for 5 ms, 1/2 sine
30 g for 10 ms, 1/2 sine
60 g for 5 ms, 1/2 sine
30 g for 10 ms, 1/2 sine
Vibration 5 g (peak) 10 Hz to 100 Hz
0,1 g/Hz 15 Hz to 2 kHz
5 g (peak) 10 Hz to 100 Hz
0,1 g/Hz 15 Hz to 2 kHz
EMC RE, CE, RS, CS iaw MIL-STD-461C for military equipment

Part Designations
Part Designation Grade Cooling Formfactor Backplane
CCII/MHA/6UAC/CPCI/xy/IND Industrial Air Cooled 6U CompactPCI
CCII/MHA/6UCC/CPCI/xy/IND Industrial Conduction-cooled 6U CompactPCI
CCII/MHA/6UAC/CPCI/xy/RGD Ruggedised Air Cooled 6U CompactPCI
CCII/MHA/6UCC/CPCI/xy/RGD Ruggedised Conduction-cooled 6U CompactPCI
CCII/MHA/6UAC/VME/xy/IND Industrial Air Cooled 6U VME
CCII/MHA/6UCC/VME/xy/IND Industrial Conduction-cooled 6U VME
CCII/MHA/6UAC/VME/xy/RGD Ruggedised Air Cooled 6U VME
CCII/MHA/6UCC/VME/xy/RGD Ruggedised Conduction-cooled 6U VME
CCII/MHA/6UAC/VPX/xy/IND Industrial Air Cooled 6U VPX
CCII/MHA/6UCC/VPX/xy/IND Industrial Conduction-cooled 6U VPX
CCII/MHA/6UAC/VPX/xy/RGD Ruggedised Air Cooled 6U VPX
CCII/MHA/6UCC/VPX/xy/RGD Ruggedised Conduction-cooled 6U VPX

[x] is one of 1 or 2, denoting the number of power supplies
[y] is one of 2, 3, 4, 5, 6, 7 or 8, denoting the number of card slots

For example : CCII/MHA/6UAC/CPCI/26/IND is an Industrial Grade Air Cooled 6U Mechanical Housing Assembly with a CompactPCI backplane providing 8 card slots and 2 power supplies.

MHA6UCC  Rev.0.4 2013-11-01
CCII Systems (Pty) Ltd P.O. Box 171 Rondebosch 7701  South Africa 
Telephone : (+27 21) 683 5490 Facsimile : (+27 21) 683 5435 WWW : www.ccii.co.za