Log in/Register News & Media | Downloads | Corporate | Careers | Contact Request

M79 - Profibus DP Slave Interface


The mezzanine card M79 is a Profibus DP interface M-Module (slave) based on the Infineon C165 CPU.

Download data sheet

  • M79 Product ImageM79 Profibus DP Slave Interface
  • M79 Product Image

Main Features

  • Profibus DP slave (DIN19245)
  • Isolated RS485
  • Local 16-bit CPU
  • 12 Mbit/s data transfer rate
  • Complete Softing Profibus software on board
  • Compatible with Softing tools
M79 Product Image

Technical Data

C165 CPU
  • 16-bit data bus, 20-bit address bus
  • Complete Profibus DP software on one M-Module
  • Local interrupt controller
  • Hardware watchdog
Slave: SPC 3 Profibus Controller
  • Up to 12Mbaud data rate
  • 8-bit interface (local)
  • Complete DP slave protocol
Master: ASPC 2 Profibus Controller
  • Optional, for M79 as Profibus Master
  • Up to 12Mbaud data rate
  • 16-bit DMA interface (local)
  • Complete bus access protocol
  • Up to 127 active or passive stations
  • 1MB shared memory for communication and program
  • Isolated RS485 Profibus interface
Peripheral Connections
Via front panel on a shielded 9-pin D-Sub receptacle connector
M-Module Characteristics
Electrical Specifications
  • Electrical isolation: 500V DC
    • 500V DC between isolated side and digital side
    • Voltage between the connector shield and isolated ground is limited to 180V using a varistor; AC coupling between connector shield and isolated ground through 47nF capacitor
  • Supply voltage/power consumption:
    • +5V (4.85V..5.25V), 287mA
  • MTBF: 860,000h @ 40°C (derived from MIL-HDBK-217F)
Mechanical Specifications
  • Dimensions: conforming to M-Module Standard
  • Weight: 53g
Environmental Specifications
  • Temperature range (operation):
    • 0..+60°C or -40..+85°C
    • Airflow: min. 10m³/h
  • Temperature range (storage): -40..+85°C
  • Relative humidity (operation): max. 95% non-condensing
  • Relative humidity (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
  • Softing protocol portation (ISO/OSI protocol layer 2/DP)
  • MEN Driver Interface System (MDIS for Windows, Linux, VxWorks, QNX)
  • For more information on supported operating system versions and drivers see Software.

Ordering Information

Miscellaneous Accessories

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



MDIS5 low-level driver sources (MEN) for M79


MDIS5 Windows driver (MEN) for M79


MDIS5 low-level driver sources (MEN) for M79


MDIS5 low-level driver sources (MEN) for M79

Contact Request! Use this form to get the fastest possible reply.
Please make sure to fill out the complete form, so we can provide quick and specific support.
Your request will be sent to our sales team.

Your information will not be shared!

* required fields

Your Request

Your Contact Data

Please type in the letters and/or numbers that you see in the image on the left (case-sensitive).