A203N - M-Module Carrier Board for 4 Mezzanine Cards

The A203N is an M-Module carrier board for universal I/O on the VMEbus, allowing high flexibility in applications such as process and motion control, measurement and instrumentation, communication or special-purpose tasks. The M-Modules are screwed tightly on the carrier board, and the board needs only one slot on the VMEbus.

The A203N is a VME64 slave card and supports four D16/D32 M-Modules with the signals either at the front or via rear I/O. An interrupt controller handles the M-Modules individually.

For rugged requirements the A203N is equipped with a stiffener front panel, allows a standard -40 to +85°C operation temperature and is prepared for conformal coating.

Additionally, the A203N is prepared for DMA transfer support.


  • 4 M-Module slots
  • 1 VME64 slave slot
  • 7-level interrupter
  • -40 °C to +85 °C


Mezzanine Slots
  • Four M-Module slots
  • Compliant with M-Module standard
  • Characteristics: D08, D16, D32, A08, A24, INTA, INTC, TRIGO, TRIGI
  • Prepared for DMA16, DMA32
  • Prepared for D16 burst, D32 burst
Interrupt Controller
Interrupt handling individually for each M-Module
Peripheral Connections
  • Via front panel
  • Via 160-pin P2 connector (rear I/O)
  • Only one slot required on the VMEbus
  • Slave
    • D08(EO):D16:D32:A16:A24:A32;BLT, prepared for D16BLT and D32BLT
  • Interrupter D08(O):I(7-1)
Electrical Specifications
  • Supply voltage/power consumption: +5V (-3%/+5%), typ. 140mA (without M-Modules)
  • MTBF: 274,000h @ 40°C (derived from MIL-HDBK-217F)
Mechanical Specifications
  • Dimensions: standard double Eurocard, 233.3mm x 160mm
  • Front panel: stiffener panel, aluminum with 2 handles, cut-outs for front connectors of 4 M-Modules
  • Weight: 350g
Environmental Specifications
  • Temperature range (operation):
    • -40..+85°C
    • Airflow: min. 10m³/h
  • Temperature range (storage): -40..+85°C
  • Relative humidity range (operation): max. 95% without condensation
  • Relative humidity range (storage): max. 95% without condensation
  • 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