VMEbus discrete output board with 64 channels. Channel outputs support; relay, optocoupler, photo-MOS, etc. SSR versions offer isolated outputs (>1000V).

Extensive Software Support

BSPs for the leading real-time operating systems - UNIX, SUN, WIN, etc.


The CM-DO-40 is a universal 64 channel discrete output VMEbus board, incorporating features most demanded in today's first class military & industrial applications.

CM-DO-40 - Discrete Output

Flexible output stage per channel can be factory fitted to support a choice of eleven different output device configurations.

Relay, Optocoupler, Photo-MOS & SSR versions offer galvanically isolated floating outputs (>1000 V).

The metallic layer within the PCB benefits heat dissipation & uniform component temperatures, thus increasing component longevity & module MTBF.

CM-DO-40 - Discrete Output

Incorporating Built-In-Test circuitry for testing all on board TTL chips using wraparound loops which read-back channel status to verify correct module operation.

Military versions with thermal overlay greatly improve capability to withstand shock & vibration.

The CM-DO-40 offers a highly flexible I/O cabling solution using VME64x connectors on both front panel and P2. Both connectors have identical pin-out.

CM-DO-40 - ATR Chassis

All versions are compatible at the function level, Industrial versions allow low cost software development.


CM-DO-40/C - Commercial

C: Commercial range >> Implements low cost Commercial plastic IC's rated for 0 to +70°C. Continuous board operation from 0 to +60°C. Class II industrial quality connectors. Storage from -10 to +85°C.


CM-DO-40/I - Industrial

I: Industrial range >> Manufactured with Industrial range plastic or ceramic IC's rated for -25 (-40) to +85°C. Continuous module operation from -20 to +75°C. Class II industrial quality connectors. Storage from -40 to +100°C.


CM-DO-40/R+ - Military Rugged

R+: Military Rugged+ range >> Implements ceramic IC's rated from -55 to +125°C. Class I MIL-C-55302 connectors. Conduction cooled PCB with thermal overlay. Operation from -40 to +85°C. Storage from -55 to +125°C.

Military 883

CM-DO-40/883 - Military 883

883: Military 883 range >> Manufactured with conduction cooled PCB & MIL-STD-883 B/C military ceramic parts (-55 to +125°C). Class I MIL-C-55302 connectors. Operation from -50 to +90°C. Storage from -55 to +125°C.

MIL-STD Components

  • MIL-STD-810D Temperature (Methods 501.2 & 502.2)
  • -55°C to +125°C ceramic military ICs
  • Military Class V Printed Circuit Board
  • MIL-C-55302 Class I Connectors
  • MIL-R-39016 Relays in MIL-883 version.
  • MIL-STD-883 TTL chips.
  • MIL-E-5400 Class 1B (Temp. & Altitude)
  • MIL-STD-810D Shock & Vibration (Methods 514 & 516)
  • No PCB tracks in external layers
  • MIL-STD-810D Saline Fog & Dust (Methods 507 & 509)

CM-DO-40 Specifications

  • Relay version (isolated): 64 sealed relays. SPST & SPDT contacts up to 300 V @ 1 Amp.
  • Optocoupler version (isolated): 64 optocouplers with 50VDC @ 100 mA output photo transistors.
  • Photo-MOS version (isolated): 64 photo-MOS FETs. 400VDC/AC @ 150 mA bidirectional switch.
  • SSR version (isolated): 64 Solid State Relays. Outputs rated for 10-280 VAC @ 1 Amp.
  • Power MOSFET version (common source): 64 N-channel open drain power MOSFETs. 400 VDC @ 1Amp.
  • Triac version (common MT1): 64 general purpose Triacs rated for 400 VAC @ 1 Amp.
  • Thyristor version (common cathode): 64 P-gate SCRs rated for 400 VAC @ 1 Amp.
  • TTL totem-pole version: 64 output gates. 60 mA sink. High speed FAST TTL compatible.
  • Open Collector version: 64 TTL gates with open collector transistors up to 30 VDC @ 50 mA.
  • Open Collector version (+5 or +12 VDC pull-up): 64 open collector transistors with 1 K (+5 V) or 2K2 (+12V) pull-ups.
  • Front panel LEDs: 64 LEDs. Illuminated when the associated channel is driven ON.
  • Channel Program Register: Programs channel output status.
  • Channel Status Register: Returns channel status and closes Built-In-Test wraparound loop.
  • Power consumption: +5VDC @ 400 mA (channels OFF).
  • Weight (grams): Military R+ & 883.- 800 gr. relays; 580 gr. other. Industrial.- 510 gr. relays; 430 gr. other.
  • VMEbus interface: A24/D16 Standard slave interface.
  • VMEbus addressing: Two jumper blocks provide 256 mapping options in the A24 range.
  • Mechanical format:
    • CM-DO-40/A: IEC-297 mechanics for 19 inch racks with I/O on front panel.
    • CM-DO-40/B: Military IEEE P1101 wedgelock mechanics for ATR enclosures.
  • Humidity: Up to 95% RH non-condensing.
  • Altitude: Sea level up to 15 Km (50,000 ft.).

CM-DO-40 Features

  • 64 discrete output channels per board.
  • AC/DC output levels up to 400 V @ 1 Amp.
  • Supports 11 different output devices: Relays, Optocouplers, Photo-MOS, SSRs,Power MOSFET, Triacs, Thyristors, TTL, etc.
  • Four output device versions are galvanically isolated.
  • Discrete input signals via 160 pin VME64x connectors on front panel and P2.
  • 64 LED indicators on front panel show all output channels ON-OFF status.
  • On board Built-In-Test capability allows testing all module TTL chips.
  • Low power CMOS design (3 watts).
  • Industrial, MIL-Rugged & MIL-STD-883 versions.
  • Available in IEC-297 mechanics with I/O via front panel & military P1101.2 mechanics with wedge-locks.
  • Conduction cooled PCB with thermal overlay in MIL-Rugged and 883 versions.
  • Extensive software support.
  • Extremely simple programming.
  • Excellent price/performance ratio.
  • Two year guarantee.

CM-DO-40 Ordering

Ordering Example: CM-DO-40 /V /T /M

V (Board Version)
1: 64 Relays with 32 SPDT plus 32 SPST contacts.
2: 64 Optocouplers with 50 VDC @ 100 mA open-collector photo transistors.
3: 64 Photo-MOSFETs up to 400 Volts AC/DC @ 150 mA.
4: 64 Solid State Relays (SSR) from 10 to 280 VAC @ 1 Amp.
5: 64 Open-Drain power MOSFETs up to 400 VDC @ 1 Amp.
6: 64 Triacs up to 400 VAC @ 1 Amp.
7: 64 Thyristor (SCR) up to 400 VAC @ 1 Amp.
8: 64 Totem-pole FAST TTL outputs *.
9: 64 Open-Collector TTL gates up to 30 VDC @ 50 mA *.
10: 64 Open-Collector TTL gates, on-board 1K pull-up resistors to +5 VDC *.
11: 64 Open-Collector TTL gates, on-board 2K2 pull-up resistors to +12 VDC *.
* Available with Direct or Inverted output configuration.

T (Board Temperature Range)
I: Industrial. Fiberglass PCB only.
R+: Military Rugged+. Conduction cooled PCB only.
883: Military 883. Conduction cooled PCB only.

M (PCB Mechanical Version)
A: IEC-297 Mechanics with front panel I/O connectors.
B: P1101.2 Military mechanics, dummy front panel & wedge-locks.

Ordering Example

Part Number Example: CM-DO-40/1/R+/B
- 64 Relays with 32 SPDT plus 32 SPST contacts.
- Military Rugged+ range (-40 to +85°C operating).
- IEEE P1101.2 Military mechanics with wedge-locks.


LEVEL 1, CM-DO-40 MAP: User´s manual. Module hardware functional description oriented toward software development.

LEVEL 2, CM-DO-40 MMT: Maintenance manual. Extended description intended for failure location in the module.

Software Support

Wind River Systems VxWorks Tornado: The CM-DO-40 is supported by VxWorks Tornado & is ideal for developing real time software under UNIX environments. A complete "C" language driver in source code is available at low cost. Drivers include a floppy-disk & user's manual.

Microware Systems OS-9: Drivers for the real time OS-9 Operating System are available in "C" language. This driver is supplied with user's manual & source code floppy-disk.

Microtec Research MCC-68K Drivers: A "C" language source code driver written for the MCC-68K cross-compiler from Microtec Research. This low cost option is intended for using a PC as host.

* NOTE - Drivers for other leading operating systems can be optionally supplied under request.