EKF - Short Profile
EKF - Short Profile


Low Profile Mezzanine for CompactPCI® Serial CPU Cards
M.2 NVMe or SATA SSD Storage

PCI Express® Mini Card Sockets

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New Mezzanine Connectors

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Low Profile Mezzanine Card for CPU Boards

M.2 SSD (NVMe PCIe x4 Gen3 or SATA 6G)
PCI Express® Mini Card Sockets (2 x Half-Mini or 1 x Full-Mini)

The S42-MC is a low profile mezzanine module for EKF CompactPCI® Serial CPU boards. It can accommodate either two PCI Express® Half-Mini Cards, or one Full-Mini Card (PCIe® Gen3 and USB 2.0), suitable e.g. for wireless applications such as WiFi or Bluetooth, or fieldbus I/O (CAN-FD). In addition, the S42-MC is equipped with an on-board M.2 PCI Express® (NVMe) or SATA mass storage module socket, for operating system installation.

The S42-MC is suitable for EKF CPU carrier cards such as the SC4-CONCERTO or SC5-FESTIVAL, which are equipped with two HSE (high speed expansion) mezzanine connectors, for eight PCIe® Gen3 lanes. The CPU carrier board and S42-MC side card assembly basically requires 4HP front panel width. If SMA antenna or any other front I/O connectors (e.g. D-Sub for CAN bus) are required, EKF offers custom specific 8HP front panel design for the assembly.

S42-MC • Low Profile Mezzanine Module • Picture Soon Here

Feature Summary

  • Low profile mezzanine module for EKF CompactPCI® Serial CPU boards
  • Proprietary size 66mm x 95mm
  • Fits basically into the 4HP (20.32mm) envelope of the CPU carrier board
  • Typically delivered as a ready to use assembly unit (including CPU card)
  • Mounting position right (on top of a CPU board)
  • Dual PCI Express® Mini Card sockets (2 x Half-Mini or 1 x Full-Mini size)
  • Provides mass storage capability M.2 NVMe/SATA

Mini Card Connectors
  • Two sockets for PCI Express® Half-Mini Cards
  • Rugged mounting (screw fixed)
  • Suitable for PCI Express® up to Gen3 and/or USB 2.0 based Mini Cards
  • Alternate usage with single Full-Mini Card
  • Custom specific 8HP front panel design available for Mini Card front I/O connectors (e.g. antenna, CAN)

Mass Storage
  • M.2 (formerly known as NGFF) socket for an NVMe type SSD module up to 2280 size
  • PCI Express® Gen3 x4 interface (M-key socket)
  • Maximum (theoretical) 32Gbps I/O data transfer rate (Gen3 PCIe® 8GT/s)
  • Capacity up to 2TB as of current
  • Suitable for operating system installation (boot device)
  • Alternate usage with a low cost 6Gbps SATA type M.2 SSD B-M key
  • Autosensing for selection between PCIe® and SATA operation
  • M.2 socket height 3.2H (double sided module allowed)
  • M.2 component height labels S1 - S5 (single sided) and D1 - D4 (double sided)

Mezzanine Connectors
  • High speed mezzanine connectors suitable e.g. for PCI Express® Gen3 and SATA 6G
  • Bottom mount male connectors HSE1 and HSE2 (high speed expansion)
  • Mating with the corresponding carrier card female connectors
  • Board-to-board height 10.0mm for a 4HP assembly
  • HSE1: PCI Express® 1x4 support or SATA 6G (dedicated to the M.2 SSD module socket)
  • HSE2: PCI Express® 4x1 support (dedicated to the PCI Express® Mini Card sockets)

  • Low cost local expansion (mezzanine module) for EKF CPU boards
  • Adds Mini Card based functions e.g. CAN-FD or WLAN/Bluetooth
  • Mass storage expansion via M.2 module NVMe/SATA SSD

Environmental & Regulatory
  • Designed & manufactured in Germany
  • ISO 9001 certified quality management
  • Long term availability
  • Rugged solution
  • Coating, sealing, underfilling on request
  • Lifetime application support
  • RoHS compliant
  • Operating temperature -40°C to +85°C industrial temperature range *)
  • Storage temperature -40°C to +85°C, max. gradient 5°C/min
  • Humidity 5% ... 95% RH non condensing
  • Altitude -300m ... +3000m
  • Shock 15g 0.33ms, 6g 6ms
  • Vibration 1g 5-2000Hz
  • EC Regulatory EN55022, EN55024, EN60950-1 (UL60950-1/IEC60950-1)
  • MTBF tbd years
  • Custom specific modifications and alternate design available on request
*) depends also on M.2 and Mini Card modules in use, and CPU carrier board

all items are subject to technical changes w/o further notice

S42-MC • Simplified Block Diagram

S42-MC • Simplified Block Diagram
Ordering Information
Please refer to List 21 for popular S42-MC SKUs
EKF is an ISO-9001 certified company
EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 Hamm • Germany
Phone +49 (0)2381/6890-0 • Fax +49 (0)2381/6890-90 • E-Mail