M51 - Mezzanine Card with 4 CAN Bus Interfaces (Product Discontinued)

The mezzanine card M51 is a CAN bus interface M-Module based on the SJA1000. It is available with one or four CAN bus controllers. The M-Module is equally suitable in fieldbus applications and for test and diagnosis equipment for the CAN bus or CAN bus devices. All channels are optically isolated from the system and from each other.

The four-channel version has been designed for example for use of SLIO CAN devices (serial linked I/O) to increase the I/O capabilities of your system in a very cost-effective way.

The M51 also supports network configurations that require high speed with short distances and low speed over long distances.

The M51 is based on the M-Module ANSI mezzanine standard. It can be used as an I/O extension in any type of bus system, i.e. CPCI, VME or on any type of stand-alone SBC. Appropriate M-Module carrier cards in 3U, 6U and other formats are available from MEN or other manufacturers.


  • 4 SJA1000 CAN controllers
  • 2.0B Basic CAN/Extended CAN
  • ISO high-speed coupling
  • Optical isolation
  • CAN Layer 2 support
  • -40 °C to +85 °C versions
  • Not conforming to RoHS


Four SJA1000 CAN Controllers
  • CAN 2.0B functionality, Extended CAN
  • Serial multi-master network with unlimited number of nodes
  • Bus access priorities
  • 29-bit message identifier
  • Powerful error handling capabilities
  • Programmable transfer rates up to 1Mbit/s
  • Bus length up to 40m at 1Mbit/s (ISO high speed)
  • Guaranteed latency for highest-priority objects
  • 0..8 bytes data block length
Physical Interface
ISO high speed coupling (optically isolated)
Peripheral Connections
  • Via front panel on a shielded 25-pin D-Sub receptacle connector
  • Via carrier board (rear I/O)
M-Module Characteristics
Electrical Specifications
  • Isolation voltage: 500V DC
  • Supply voltage/power consumption: +5V (4.85V..5.25V), 900mA typ. (with four CAN controllers)
  • MTBF: 45,000h @ 50°C (derived from MIL-HDBK-217F)
Mechanical Specifications
  • Dimensions: conforming to M-Module Standard
  • Weight: 90g
Environmental Specifications
  • Temperature range (operation):
    • 0..+60°C
    • Industrial temperature range on request
    • Airflow: min. 10m³/h
  • Temperature range (storage): -40..+85°C
  • Relative humidity range (operation): max. 95% non-condensing
  • Relative humidity range (storage): max. 95% non-condensing
  • Altitude: -300m to + 3,000m
  • Shock: 15g/11ms
  • Bump: 10g/16ms
  • Vibration (sinusoidal): 2g/10..150Hz
  • Conformal coating on request
PCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
Tested according to EN 55022 (radio disturbance), IEC 61000-4-2 (ESD) and IEC 61000-4-4 (burst)
Software Support