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DESCRIPTION
The Elma CMFF Chassis is an off-the-shelf 3U SOSA and CMOS
alligned configurable and deployable chassis solution designed for
ground vehicles and ground combat environments. It is intended
for Integrated Command, Control, Computers, Cyber, Intelligence,
Surveillance, and Reconnaissance (C5ISR) and designed for ground
vehicle applications. The chassis meets the size, weight, power,
and connector, and electrical interface requirements outlined by the
Standard A-Kit Vehicle Envelope (SAVE)
The Chassis is compliant to CMOSS and aligned with SOSA
Technical Standard. This mission-ready chassis comes standard with a
7 slot backplane ready to accept SOSA aligned plug-in cards (PICs)
and VITA 62 power supply and is an ideal way to rapidly integrate a
deployable platform. The chassis ships with the backplane, a
chassis manager, a hold-up module, and a VITA 62 plug-in power
supply. All are SOSA aligned. A key feature is the USB-based mainte
nance port aggregator for simplified servicing.
The all-aluminum chassis incorporates military-grade components like
MIL- STD-38999 connectors, line filter, on/off and reset switches,
LEDs, circuit breakers, etc. It is EMC shielded to MIL-STD-461E. The
cooling fan is a military-grade, high-altitude fan that can operate under
extremely harsh temperature conditions. Custom options such as
different backplanes, dual power supplies, and different cabling are
available from the factory upon request.
Features
■ CMOSS / SOSA Aligned and SAVE compliant Chassis
■ Meets SAVE dimensional requirements of 9.3”(H) 15.9” (W)
x 16.1” (D) with 2”x4” notch / keep out space
■ Chassis dimensions allow space for cables and shock tray
within the envelope
■ Elma’s 7-slot OpenVPX backplane aligned with SOSA
profiles and CMOSS (1SVX306ARP-9K31)
■ Meets ARINC 404A and ANSI/VITA 48.2
■ Aluminum dip-brazed design to meet rugged environments
■ Power supply and line filter combination optimized to meet
MIL-STD-461
■ Tested to meet MIL-STD-810 and 641 and MIL-1275
■ Includes SOSA aligned chassis manager, a hold-up module
(50ms), and VITA 62 plug-in power supply
■ Front panel USB-based maintenance port aggregator

OVERVIEW
System Platforms
Elma Electronic UK Ltd
Backplanes
Elma Electronic UK have designed a small form factor, light weight ½
ATR chassis for use in harsh environments. The unit has been designed
to house 3 off 3U VPX (VITA 48.2) payload cards and 1 of 3U VPX
(VITA 62) PSU and protect them from the external environment. The
chassis incorporates a military grade high speed fan which provides air
though sealed cooling channels on the side of the chassis. Detailed
thermal modelling has been performed to ensure the chassis maintains
optimum thermal performance at all operating altitudes. The operation
of the fan can be monitored via a tachometer signal and optional speed
control is available. The backplane can support up to 4 slots on a 1”
pitch and up to 120 high speed differential pairs can be routed to the
front panel connectors for interconnection with external equipment.
The design can be easily customised to suit individual customer
requirements, and is always performed in conjunction with the overall
system design to ensure the best EMC and thermal performance of the
complete system.
FEATURES
• Weight Approximately 4Kg (Without Boards)
• Arinc 404 Mounting System Including Front Hooks And
Rear Dowels
• ½ ATR Form Factor With Custom (230mm) Length
• Aluminium Construction With ChromiTAL TCP Finish
(Alochrom Option Available)
• Sealing Possible To IP67
• Rear Carrying Handle
• Front Extraction Handle
• 4 Slots, 5HP Wide (1” Pitch) For Payload Cards
• 3U Conduction Cooled Plug In Module Slots
• Front Panel Connectors For Interface To External Systems
• 28V DC Input
• Power Filtering And Protection
• Configurable Front Panel Interface Card
• 22000 RPM Fan With Tachometer Signal
• Optional Fan Speed Control

DESCRIPTION
The modular design of this Mini ATR platform allows for various con
figurations. The chassis can easily be scaled up or down while using
the same side walls. DC and AC power variations as well as custom
front I/O configurations are available. Elma also offers a wide selec
tion of backplanes in various architectures and has different milled
card cage sizes off-the-shelf.

■ Small form factor mini ATR-style chassis, natural convection
cooled is low weight, ideal for weight critical applications
(SWaP)
■
■ 3-slot backplane, 1in pitch to meet VITA 65 (OpenVPX) Back
plane Profile BKP3-CEN03-15.2.9-n accepts 3U OpenVPX
boards on a 1in pitch, according to VITA 48.2 (REDI) and
VITA 65 (OpenVPX)
■
■ Other backplanes can be accommodated: 3U CPCI, custom
■
■ Two sizes available; other sizes custom:
■
■ 1)133mm H x 175mm W x 311mm D (5.24in H x 6.89in
W x 12.24in D)
■
■ 2) 133mm H x 175mm W x 235mm D (5.24in H x
6.89in W x 9.25in D)
■
■ Advanced airflow design distributes air across external fins in
sidewalls
■
■ Optional plug-in power supply provides up to 350 W VDC;
AC versions also available
■
■ Option to accommodate 2.5in storage with drive tray
■
■ Custom I/O options including MIL-STD wiring and connectors

DESCRIPTION
Elma’s all-new CompacFrame platform accelerates development
and test of 3U plug-in-cards (PICs) designed according to the
VITA 48.8, Air Flow Through Cooling standard. The 3U card
cage in the platform is tilted upwards by 5° for easier card access.
The CompacFrame accepts multiple1- slot VPX power & ground
backplanes in 1”, 1.2” or 1.5” pitch or the AFT specific 5 slot
backplane (1SVX306APP-1X31, 1.5” pitch).
Functional Features
■ Accommodates 3U modules according to the VITA 48.8
Air-Flow-Through (AFT) standard
■ Using the1SVX306APP-1X31 backplane aligns this
CompacFrame for SOSA development
■ 1400W ATX PSU standard
■ Integrated carry handle
■ 5º upwards tilt to card cage
■ Front panel voltage monitoring LEDs and test points
■ Front panel zeroize, NVMRO, reset, and power switches
■ Battery for VBAT connection
■ Includes VITA 46.11 chassis manager with rear accessible
Ethernet and serial ports
■ Slot 1 of 1SVX306APP-1X31 backplane is an I/O Intensive slot
that supports 3U RTM plus access to Expansion Plane for cabling
connections.
■ Slots are for 1.5” VITA 48.8 -3UB (bottom to top airflow)

DESCRIPTION
ATR-3600S is an off-the-shelf half-ATR specifically designed for
deployable applications requiring alignment with the SOSA
Technical Standard. This six-slot chassis is mission-ready to
accept SOSA aligned plug-in cards (PICs) and VITA 62 power
supply and is an ideal way to rapidly integrate a deployable
platform leveraging the power of SOSA. This short half ATR
ships configured with a 6-slot OpenVPX™ backplane, chassis
manager, ethernet switch, and power supply. All are SOSA
aligned. A key feature is the USB-based maintenance port
aggregator for simplified servicing.
The all-aluminum ATR incorporates military-grade components
like MIL- STD-38999 connectors, line filter, on/off and reset
switches, LEDs, circuit breakers, etc. EMC shielding compliant
to MIL-STD-461E. The cooling fan is a military-grade,
high-altitude fan that can operate under extremely harsh
temperature conditions. Custom options such as different
backplane, dual power supplies, different cabling available
from the factory upon request.
Features
■ 1/2 ATR, conduction-convection cooled
■ Advanced airflow design distributes air across external fins in
sidewalls
■ 6-slot, 3U OpenVPX (VITA 65) SOSA aligned backplane, 1” pitch
(1SVX306AKP-1X31)
■ Meets ARINC 404A and ANSI/VITA 48.2
■ Aluminum dip-brazed design to meet rugged environments
■ Low weight and ideal for weight critical applications
■ Power supply and line filter combination optimized to meet
MIL-STD-461E
■ Includes SOSA aligned chassis manager, ethernet switch, and
power supply
■ Front panel USB-based maintenance port aggregator

DESCRIPTION
The modular design of this Mini ATR platform allows for various con
figurations. The chassis can easily be scaled up or down while using
the same side walls. DC and AC power variations as well as custom
front I/O configurations are available. Elma also offers a wide selec
tion of backplanes in various architectures and has different milled
card cage sizes off-the-shelf.
Functional Features
■
■ Small form factor mini ATR-style chassis, natural convection
cooled is low weight, ideal for weight critical applications
(SWaP)
■
■ 3-slot backplane, 1in pitch to meet VITA 65 (OpenVPX) Back
plane Profile BKP3-CEN03-15.2.9-n accepts 3U OpenVPX
boards on a 1in pitch, according to VITA 48.2 (REDI) and
VITA 65 (OpenVPX)
■
■ Other backplanes can be accommodated: 3U CPCI, custom
■
■ Two sizes available; other sizes custom:
■
■ 1)133mm H x 175mm W x 311mm D (5.24in H x 6.89in
W x 12.24in D)
■
■ 2) 133mm H x 175mm W x 235mm D (5.24in H x
6.89in W x 9.25in D)
■
■ Advanced airflow design distributes air across external fins in
sidewalls
■
■ Optional plug-in power supply provides up to 350 W VDC;
AC versions also available
■
■ Option to accommodate 2.5in storage with drive tray
■
■ Custom I/O options including MIL-STD wiring and connectors

Increasingly power-hungry OpenVPX modules require a cooling solution guaranteed
to keep the mission on course. From the experts in packaging for extreme
environments comes the VITA 48.4 LFT field-deployable ATR platform.
Elma Electronic’s newest rugged OpenVPX ATR platform is designed to accommodate
boards requiring liquid flow-through (LFT) cooling per the VITA 48.4 standard.
VITA 48.4 establishes the mechanical design interface, outline and mounting
requirements for 6U OpenVPX liquid-flow-through cooled plug-in modules within
associated sub-racks. While the connector layout remains common with VITA 46,
VITA 48.4 standard modules are cooled by liquid flowing through an integral
heatsink. Circuit boards and electronic components are cooled more effectively
as compared to other more traditional cooling methods such as air or conduction
cooling alone. Quick disconnect coupling assemblies allow fluidic coupling to the
chassis manifold.
Backplane
Designed for data rates up to 10 Gbps, the backplane is
designed to handle 300 Watts per slot. It features eight 6U slots
on a 1.2” pitch. Clockable guide pins are included at each slot
to allow for easier keying (angle rotation) without having to deal
with the removal of the backplane from chassis. From left to right:
■ Two VITA 62-compliant power supply slots
■ Three 6U Payload slots with VITA 67.3c apertures in J3 & J6
■ One Switch slot with VITA 67.3d aperture in J6b
■ Two 6U Payload slots populated with all J1-J6 connectors
LFTATR_Rev1
Features
■ 1 ATR tall short
■ Rugged, bolted construction
■ Liquid flow-through (LFT) cooling compliant to VITA 48.4
■ 6U OpenVPX backplane with 6-slots on 1.2” pitch supports
300W/slot
■ Configurable front I/O connectors on removable panel
■On/off power switch with guard and LED status indicators
■ Filtered power input connector
■ Individual card coolant flow rates are adjustable with
selectable openings
■ Supports dual VITA 62 power supplies
■ VITA 46.11 compliant Shelf Manager option
■ Designed to meet MIL-STD-461, MIL-STD-810, MIL-STD-1275

FEATURES
■ Meets ARINC 404A, ARINC600 and IEEE 1101.2 specifications
■ Operating temperature range of -40ºC to +70ºC
■ Low weight, ideal for applications where the weight is critical
■ Backplane options for VME/64X, cPCI, VXS, VPX and custom
■ Features a MIL 38999 type power connector with an integrated
line filter
■ Power supply and line filter combination are optimized to
meet MIL-STD 461E
■ Rugged aluminum dip-brazed construction is designed to
meet MIL-STD 810F for shock and vibration
■ Optimized for cooling via thermal simulation studies

Description
The modular design of this Mini ATR platform allows for various configurations. The
chassis can easily be scaled up or down while using the same side walls. DC and
AC power variations as well as custom front I/O configurations are available. Elma
also offers a wide selection of backplanes in various architectures and has different
milled card cage sizes off-the-shelf.
Features
• Small form factor mini ATR-style chassis, natural convection-cooled is low
weight, ideal for weight critical applications (SWaP)
• 3-slot backplane, 1in pitch to meet VITA 65 (OpenVPX) Backplane
Profile BKP3-CEN03-15.2.9-n accepts 3U OpenVPX boards on a 1in
pitch, according to VITA 48.2 (REDI) and VITA 65 (OpenVPX)
ELMA
Chassis Platform
• Other backplanes can be accommodated: 3U CPCI, custom

• Two sizes available; other sizes custom:
  1) 133mm H x 175mm W x 311mm D (5.24in H x 6.89in W x 12.24in D)
  2) 133mm H x 175mm W x 235mm D (5.24in H x 6.89in W x 9.25in D)
  Optional Computing Products
  • 3U and 6U VPX compliant single board computers.
  • Storage solutions; Secure, Rugged, NAS, RAID.
  • Blade level networking boards (fabric switches)
  • FPGA configurable I/O solutions
  • Ruggedization programs
  Ordering Information
  • Advanced airflow design distributes air across external fins in sidewalls
  • Optional plug-in power supply provides up to 350 W VDC; AC ver
  sions also available
  • Option to accommodate 2.5in storage with drive tray
  • Custom I/O options including MIL-STD wiring and connectors

Description
Elma’s D-Frame engineering development platform combines a rich feature set
with portability and easy access for embedded system design efforts.
It is ideal for activities such as board design, application development, data flow
analysis, troubleshooting and demonstration. Light weight with a convenient car
rying handle and rubber feet, the brief case shape promotes easy collaboration
and transportation among design team members supporting demonstration and
test activities. A hinged top hatch provides easy access for probing cards and
rear transition modules. Expandable design enables support for multiple board
counts in 3U and 6U form factors.
Features
• 1 slot, 3U / 5HP VPX power & ground backplane, P/N101VPX301P-1X31R
• 1 3U / 5HP / 80mm RTM slot including card guides and blank panel
• Supports 3U boards and RTMs
ELMA
System Platforms
• AC/DC external 12V power supply with D38999 connector. Internal DC-DC
conversion for VPX rails and fan power. Inquire about alternate power options

• 3 fans providing side to side airflow
  • Clear top hatch with hinges for easy access
• Front and rear card guides
  • Optional conduction cooled card guides for conduction cooled cards
  Rear
  • Carrying handle and 4 mounting feet for desk top usage
  • Supplied assembled, wired and tested