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M82 - Mezzanine Card with 16 Digital 20 kHz Inputs


The M82 is an M-Module with 16 fully isolated digital input channels with latching and comparator capabilities. A current limit for each input guarantees an input voltage range of 0 to 40V. It is designed for industrial automation, medical computers, in-vehicle computers, and embedded computers in transportation.

  • M82 Product ImageM82 16 Digital Inputs
  • M82 Product Image

Main Features

  • 16 fast 20 kHz inputs
  • 0 V to 40 V input voltage
  • Constant current inputs
  • Hysteresis function
  • Interrupt generation
  • 500 V DC isolation from the system
  • 100 V DC isolation between the channels
  • -40 °C to +85 °C
M82 Product Image

Technical Data

Binary Inputs
  • FET constant current source inputs
    • 5.6mA typ.
  • Input voltages and currents:
    • 0..40V max.
    • 5.5V, ±0.5V (switching voltage 0) @ 3mA min., 3.3mA typ., 4mA max.
    • 9.5V, ±0.5V (switching voltage 1) @ 4mA min., 5.6mA typ., 10mA max.
    • 15.2V, ±0.5V (switching voltage 2) @ 4mA min., 5.6mA typ., 10mA max.
  • Switching Times
    • Rise time: 4.2µs typ.
    • Fall time: 32µs typ.
  • Hysteresis function
  • Interrupt generation with maskable interrupt
Peripheral Connections
Via front panel on a shielded 44-pin HD-Sub receptacle connector
M-Module Characteristics
Electrical Specifications
  • Isolation voltage:
    • 500V DC between isolated side and digital side
    • All channels are optically isolated (100V between the channels)
  • Supply voltage/power consumption: +5V (4.85V..5.25V), 220mA typ.
  • MTBF: 370,000h @ 40°C (derived from MIL-HDBK-217F)
Mechanical Specifications
  • Dimensions: conforming to M-Module Standard
  • Weight: 72g
Environmental Specifications
  • Temperature range (operation):
    • 0..+60°C or -40..+85°C
    • 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
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
  • MEN Driver Interface System (MDIS for Windows, Linux, VxWorks, QNX, OS-9)
  • For more information on supported operating system versions and drivers see Software.

Ordering Information

Standard M82 Models

16 digital inputs, fully isolated, -40°C to +85°C with qualified components

Miscellaneous Accessories

M-Module cable, 2.5m, with 44-pin HD-Sub plug/housing to pig tail


25 mounting screw sets to fix M-Modules on carrier boards (3 different screw types, 50 pieces each)



The MDIS5 system package includes most standard device drivers for Linux available from MEN.


MDIS4/2004 / MDIS5 Windows driver (MEN) for M31, M32 and M82


MDIS5 System (and Device Driver) Package (MEN) for VxWorks. This software package includes most standard device drivers available from MEN.


MDIS4/2004 system (and device driver) package (MEN) for QNX, source code. This software package includes most standard device drivers available from MEN.


MDIS5 low-level driver sources (MEN) for M31, M32 and M82

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