EKF - Short Profile
EKF - Short Profile


Low Profile Mezzanine for CompactPCI® Serial CPU Cards
M.2 NVMe SSD Storage • USB Type-C Front I/O
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Mezzanine Connectors

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S20-NVME • Low Profile Mezzanine
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Low Profile Mezzanine Card for CPU Boards

M.2 SSD (NVMe PCIe x4 Gen3) • Front Panel I/O USB Type-C

Available as a mezzanine add-on expansion board e.g. to the SC5-FESTIVAL and successor CPU carrier cards, the main purpose of the S20-NVME is to provide a mass storage solution, by means of an NVMe (PCIe x4) M.2 SSD module. M.2 (formerly NGFF) has been established as a standard by the PCI-SIG® and is very popular for industrial applications (IoT).

The S20-NVME accommodates an M.2 module with key ID M (PCIe x4), up to 22x80mm2 (2280). NVMe SSD modules are available from several manufacturers, with a maximum capacity of 2TB as of current.

In addition, a front panel Type-C receptacle is provided on the S20-NVME, for use as USB 3.1 Gen 1 (5Gbps) host port (DFP). Dual screw locking Type-C cable connectors are supported. External devices attached can be sourced via VBUS up to 3A/5V.

The S20-NVME connects to the mezzanine expansion connector HSE1 of the CompactPCI® Serial CPU carrier board, maintaining the 4HP (20.32mm) total assembly height (low profile mezzanine module). The S20-NVME can be used together with an additional side card (8HP in total) attached to the CPU HSE2 connector.

S20-NVME • Low Profile M.2 Storage Mezzanine Module

S20-NVME • Low Profile M.2 Storage Mezzanine Module

Feature Summary

Form Factor
  • Proprietary size mezzanine module 84.3mm x 95mm
  • Fits basically into the 4HP (20.3mm) envelope of the CPU carrier board
  • Typically delivered as a ready to use assembly unit (including SC4-CONCERTO or successor CPU card)
  • Mounting position right (on top of a CPU board or CPU side card)

Host I/F Connectors HSE1
  • High speed mezzanine connectors
  • Suitable for PCI Express® Gen3, USB 3.0 SuperSpeed
  • Bottom mount male connector HSE1 (high speed expansion)
  • Mating with the carrier card female connector HSE1
  • Board-to-board height 10.0mm for a 4HP assembly
  • Cutout around carrier card connector HSE2 - allows additional side card use (8HP front panel width in total)
  • PCI Express® x4 support, dedicated to the NVMe SSD module M.2 socket
  • 1 x USB 3.1 Gen1 5Gbps support, dedicated to the Type-C USB front panel I/O connector)
  • Power sourcing 12V/1.5 A maximum continuous current (2 pins)

M.2 Module Connector
  • M.2 socket key Id M, for 1 x NVMe (PCIe x4) SSD, M.2 size up to 2280
  • Power switch for M.2 module undervoltage lockout, short-circuit protection, quick discharge
  • M.2 NVME SSD module socket, key Id M, PCIe x4 I/F
  • PCIe x4 sourced via HSE1 mezzanine connector
  • Maximum (theoretical) 32Gbps I/O data transfer rate (Gen3 PCIe 8GT/s)
  • Module dimensions 2230/2242/2260/2280, screw fixed
  • Module height (Label) S1-S5, D1-D4

Type-C Front Panel Connector
  • Type-C front panel receptacle
  • Suitable for Type-C compliant USB cable assemblies
  • Support for Type-C locking plugs (dual screw) according to the 'Locking Connector Spec. Rev. 1.0'
  • VBUS over voltage, surge, and ESD protection
  • Host mode USB 3.1 Gen 1 (5Gbps SuperSpeed), passed through from HSE1 mezzanine connector (CPU carrier card USB host controller e.g. PCH)
  • Downstream Facing Port (DFP) controller and power switch, up to 5V/3A VBUS
  • 10Gbps MUX for Type-C flip control (signal flow according to the cable plug orientation)
  • USB 3.1 Gen 2 ready (10Gbps SuperSpeed+) for future CPU chipset generation

  • Low profile mezzanine module for EKF CPU Cards (SC4-CONCERTO, SC5-FESTIVAL and successional)
  • 4HP assembly CPU carrier board and S20-NVME mezzanine card
  • M.2 based mass storage, M.2 PCIe x4 socket (NVMe)
  • Optional front panel I/O (2 x Type-C, dual screw locking)
  • Front panel I/O connector Type-C, dual screw locking, USB 3.1 Gen 1

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 0°C to +70°C
  • Operating temperature -40°C to +85°C (industrial temperature range) on request
  • 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
  • MTBF 141.8 years MIL-HDBK-217F
  • EC Regulatory EN55035, EN55032, EN62368-1

S20-NVME • Simplified Block Diagram

S20-NVME • Simplified Block Diagram

S20-NVME & CPU Carrier Card

S20-NVME & CPU Carrier Card
Ordering Information
Please refer to List 21 for popular S20-NVME 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