Sealed, 0.8" pitch, low cost dry-air 6U chassis that incorporates extended cooling fins & air re-circulation fans inside. This minimum maintenance ATR is ideal for low wattage applications where ambient air is laden with hostile or harmful contaminants.
Heat generated within the enclosure is dissipated by a combination of cold-plate conduction, radiation and free-air convection through the chassis metalwork & extended fins to the ambient environment. Internal air recirculation fans ensure constant airflow across modules.
The 6U SEF chassis is available in 5, 7, & 12 slot versions ( ½ ATR, ¾ ATR, 1 ATR), supporting VME, cPCI, VPX, VPX-VME & cPCI-VME hybrid backplanes. A total PSU power of up to 1050 watts may be installed. Custom modifications can be designed upon request.
Internal layout is divided into 3 independent metallic partitions. I/O section at the front, card-cage in the middle & PSU section at the rear. This improves EMI/EMC performance & reduces PSU noise on system electronics.
Attention to I/O flexibility and easy board integration; allowing the intermixing of wedgelock IEEE P1101.2 conduction cooled boards, IEC-297 air cooled modules, Compact PCI 1101.1/IEC/118/ CD and VPX VITA 46.0/.1/.10/.3/.4/.7 air cooled boards.
Slots / Pitch:5 | 7 | 12 0.8"
Sealed (Dry Air):≤ 220W
The 3U SEF chassis is suitable for low wattage sealed applications that demand moderate passive cooling capabilities. This silent, fanless model is ideal for submarine, proximity to operator & deploy and forget applications.
SEF - Chassis Global Thermal Resistance (CGTR) coefficient:
ΔT/W = 0.23°C (½ ATR) | 0.21°C (¾ ATR) | 0.15°C (1 ATR) .
SEF - Chassis Payload Thermal Resistance (CPTR) coefficient:
ΔT/W = 0.278°C (½ ATR) | 0.254°C (¾ ATR) | 0.181°C (1 ATR).
For reliable operation it is recommended the maximum Payload Power not be exceeded. Subject to operating conditions.
All CM 6U ATR chassis are delivered tested, qualified and certified per Military Standards MIL-STD-461E & MIL-STD-810F.
CM 6U SEF military backplanes are available in VPX, VMEbus, cPCI, or combinations of VPX-VME64 or cPCI-VME64 hybrids, providing standard bus slot and signal daisy-chain functionalities. Designed to improve card-cage mechanical performance with 0.8 inch pitch slots & implement many features.
All 6U backplanes install specific TTL logic circuitry for driving up to 8 front panel user LED indicators. Units fitted with a Temperature Supervisory Unit will also drive an additional panel LED TEMP (over/under temperature indicator).
All SEF backplanes integrate a Temperature Supervisory Unit (TSU) with panel LED (over/under temperature) that controls Power Supply & Fan operation. Remote optoisolated control switches for ‘Battle-short’ & chassis PSU ‘on/standby’ are fitted as standard but not activated by default.
CM 6U military backplanes allow unlimited pin I/O wiring capability. Flexible top & bottom wiring integration is facilitated by a standard 25mm bottom cavity clearance to avoid requiring a custom backplane.
Final slots in 12 & 7 slot chassis allow for bus functionality & contain power/control provisions to accept a eurocard-size metallically caged Redundant PSU. A single slot RPSU up to 575W operates in parallel with main PSU on a load-sharing basis to minimize component stress.
Custom backplanes maybe designed upon customer request.
CM backplanes support one or two 100W power sockets for optional micro-size DC/DC military converters with user defined output voltage. The converters are useful for increasing the +5VDC or +3.3VDC power lines or for generating isolated positive, negative or bipolar auxiliary DC voltages.
Class 1 military power input connectors offer reliable shock & vibration interconnectivity between chassis internal modules and allows high DC current rates with low voltage drops & minimum contact heating.
6U backplanes are supplied with military conformal coating. Printed circuits boards are partially coated per MIL-I-4658C in areas in which do no affect VPX, VME, cPCI, or I/O connectors.
All 6U models integrate similar backplane electronics for easy switch-overs, retrofits or replacement parts.
6U SEF chassis PSUs support a wide variety of AC/DC input voltages (MIL-STD-704 & MIL-STD-1275) and customer defined DC power output combinations up to 1050 Watts. Available in different versions to suit input voltage requirments.
All PSU models are fitted with Power Fail Monitor, remote voltage sensing, output voltage trim-up, time-delayed protection fuses, rear fan fuse and DC/DC converter remote shutdown.
To comply with MIL-STD-461E, a high capacity integrated EMI/EMC input voltage filter is fitted as standard on all 6U models. PSUs are custom made to match the enclosure mechanics.
200VAC 3-Phase PSU versions incorporate AC/DC rectifier stage prior to the VICOR FIAM front-end modules.
DC PSUs are equipped with a VICOR military Filter and Attenuator Module (FIAM). This front-end device is fitted prior to the DC/DC converters to provide EMI filtering, inrush current limiting and transient protection.
Front-end FIAM modules are protected against DC reverse polarity. An optional reverse polarity diode may be fitted in series with power connector input pin IN (+).
Single-phase AC PSUs are fitted with a VICOR military Filter and Autoranging Rectifier Module (FARM) to provided EMI filtering, autoranging line rectification and inrush current limiting to meet MIL-STD-461E category A1b specifications for Electromagnetic Compatibility.
6U SEF PSUs incorporate isolated DC/DC converters & oversized hold-up capacitors to ensure proper operation during short power line failures. Outputs are protected against short-circuit, thermal-shutdown etc.
in SEF models is attached to the chassis rear panel, providing thermal conduction to the chassis frame & extended fins.
Internal air recirculation dissipates heat generated via convection cooling that inturn is conducted through all chassis panels.
|WIDTH||155 mm||195 mm||296 mm|
|HEIGHT||246 mm||246 mm||246 mm|
|DEPTH||405 mm||405 mm||405 mm|
|WEIGHT||6.3 Kg||7.7 Kg||11.2 Kg|
|CGTR COEFF||ΔT/W = 0.23°C||ΔT/W = 0.21°C||ΔT/W = 0.15°C|
|CPTR COEFF||ΔT/W = 0.278°C||ΔT/W = 0.254°C||ΔT/W = 0.181°C|
|PSU MAX POWER||575 Watts (28 VDC 475 Watts)||650 Watts (28 VDC 550 Watts)||1050 Watts (28 VDC 950 Watts)|
|PSU V-INPUT||28 VDC ±30%, 48 VDC ±30%, 72 VDC ±30%, 270 VDC ±30%, Autorange 90-132 VAC RMS & 180-264 VAC RMS 47-880 Hz, 3-Phase 200 VAC ±30% 47-880 Hz|
|STD BACKPLANE||6U (0.8" Pitch), VME64X or cPCI or VPX or Hybrid VME64X/VPX or VME64X/cPCI|
|BOARD FORMAT||CCS: Conduction-cooled slots only or MCS: Slot-by-slot user configured card-cage allows intermixing conduction-cooled ANSI-VITA 48.2 & air-cooled ANSI-VITA 48.1 boards|
|INTERNAL FAN||27 CFM||54 CFM||108 CFM|
|FRONT PANEL AREA||101 mm x 172.5 mm||141.5 mm x 172.5 mm||243 mm x 172.5 mm|
|6 Power Pins (23 Amp) & 365 I/O Pins (5 Amp)||6 Power Pins (23 Amp) & 822 I/O Pins (5 Amp)||6 Power Pins (23 Amp) & 1057 I/O Pins (5 Amp)|
|OPERATING TEMP||-40 °C to +85 °C Operating Temperature, -55 °C to 100 °C Storage Temperature|
|MTBF||25° GB 98,000 Hours, 65° AIC 32,000 Hours||25° GB 86,000 Hours, 65° AIC 28,000 Hours||25° GB 78,000 Hours, 65° AIC 24,000 Hours|
These highly optimized 6U chassis incorporate all proprietary technologies, features and well established mechanical & electrical solutions developed during the past 27 years.FAC:Flow-through airflow open enclosure.