M27 - Mezzanine Card with 16 Digital Outputs, Low-Side Switching

The mezzanine card M27 with its open-collector outputs can be used in process I/O applications (cf. M28 with open-emitter 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 M27 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.


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


Digital Output Characteristics
  • Load on supply voltage
  • Thermal and short circuit protection
  • Output Voltage: 8 V to 36 V; 10 µA max. (open)
  • Output Voltage: 2 V max.; 500 mA (closed)
  • Output Current: 500 mA max. (per channel)
  • Output Current: No derating
  • Digital I/O
    • 16x digital output, isolated, D-Sub, 25-pin, receptacle
    • 16x digital output, isolated, board to board
  • M-Module
    • 1x A08/D16/IDENT, board to board
Product Standard
M-Module: ANSI/VITA 12-1997 (S2012)
Electrical Specifications
  • Supply voltage
    • +5 V (-3%/+5%)
  • Power consumption
    • 0.5 W typ.
  • Isolation voltage:
    • 500 V DC between isolated side and digital side
    • Voltage between the connector shield and isolated ground is limited to 180 V using a varistor; AC coupling between connector shield and isolated ground through 47 nF capacitor
Mechanical Specifications
  • Dimensions standard: M-Module: (W) 149 mm, (D) 53 mm
  • Weight: 84 g
Environmental Specifications
  • Operating temperature
    • 0°C to +60°C
    • Industrial temperature range on request
    • Airflow: min. 10m³/h
  • Storage temperature: -40°C to +85°C
  • Relative humidity range (operation): max. 95% non-condensing
  • Relative humidity range (storage): max. 95% non-condensing
  • Altitude: -300 m to + 3000 m
  • Shock: 15g/11ms
  • Bump: 10g/16ms
  • Vibration (sinusoidal): 2g/10 Hz to 150 Hz
  • Conformal coating on request
PCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
  • EN 55022 (radio disturbance)
  • IEC 61000-4-2 (ESD)
  • IEC 61000-4-4 (burst)
MTBF: 58 000h @ 50°C (derived from MIL-HDBK-217F)
Software Support