M28 - Mezzanine Card with 16 Digital Outputs, High-Side Switching

The mezzanine card M28 with its open-emitter outputs can be used in process I/O applications (cf. M27 with open-collector outputs). If there are currents of above 500mA an intelligent power switch guarantees that the respective transistor is switched off.

The M-Module is equipped with suppressor diodes for protection against overvoltage caused by inductive loads. The output registers can be read back.

The M28 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 duagon or other manufacturers.


  • 16 outputs 8 V to 36 V
  • 500 mA output current per channel
  • Thermal and short-circuit protection
  • Load on ground
  • Optical isolation