Universal VMEbus 16 serial channel board. Based on the SCC Z-8530/85230 with up to 20 MHz & communications up to 5 Mbs.

Extensive Software Support

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


CM-IOC-40 is a universal 16 serial channel VMEbus board that incorporating features most demanded in first class military & industrial applications.

CM-IOC-40 - Input/Output

Based on the SCC Z-8530/85230 up to 20 MHz, all serial channels can be factory fitted for RS-232, RS-423, RS-422, or RS-485 EIA standard levels.

An extremely versatile baud rate generator allows any standard or non standard communication up to 5 Mbs.

Built-In-Test per channel based on a dual wraparound loop that disconnects serial I/O signals & connects internal test signals to verify correct operation.

CM-IOC-40 - Input/Output

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

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

The CM-IOC-40 offers a highly flexible I/O cabling solution using VME64x connectors on the front panel and P2/P0. Both connectors have identical pin-outs.

CM-IOC-40 - Input/Output

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


CM-IOC-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-IOC-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-IOC-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-IOC-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
  • MIL-STD-883 FPGAs & TTL chips
  • Military Class V Printed Circuit Board
  • MIL-C-55302 Class I Connectors
  • MIL-R-39016 Relays (V.883)
  • 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-IOC-40 Specifications

  • Serial channels: 16 independent full duplex channels.
  • Serial controller (SCC): 8 industry standard Z-8530 or Z-85230 chips @ 8-10-16-20 MHz. Each serial controller has two complete serial ports.
  • Z-85230 features: Supports sync/async operation, on-chip baud generator, HDLC/SDLC protocols, digital PLL, automatic CRC, etc.
  • Serial levels: All serial channels can be factory fitted to operate at RS-232, RS-422, RS-423 or RS-485 EIA standard levels.
  • Serial signals: Support for TxD, RxD, CTS, RTS, DCD, DTR, CLK-in and CLK-out per channel.
  • Serial transceivers: Accept a wide set of I/O devices in all temperature ranges supplied by SIPEX, MAXIM, NATIONAL, LINEAR, etc. i.e. MAX490, LTC490, SP490, SP485, MAX485, LTC485, DS3695, MAX238, HIN208, SP238, DS14C238, etc.
  • Galvanic isolation: All serial channels optionally support isolated I/O lines (> 1000 Vp), offering fully floating serial lines with respect to other channels or VMEbus signals.
  • Front panel LEDs: 64 LEDs distributed with four LEDs per channel which are illuminated when the RxD, TxD, CTS or RTS lines are active.
  • Control Register: Activates the dual Built-In-Test circuitry.
  • Built-In-Test: Dual independent wraparound BIT loop:
    • TTL level Built-In-Test: checks 100% of module TTL chips. Disconnects SCC serial lines to/from the transceivers and interconnects all serial channels amongst themselves in pairs.
    • Transceiver Built-In-Test: determines any transceiver failure. A set of BIT relays isolate serial signals from the application and interconnects all serial channels amongst themselves.
  • RS-232/423 signals: Tx, Rx, CTS, RTS, DCD, DTR, 2xCLK.
  • RS-422 signals: Tx, Rx, CTS, RTS.
  • RS-485 signals: Tx, Rx (full duplex); bidi AB (half duplex).
  • VMEbus Interrupter: I(1-7). Manages IRQs from all SCCs.
  • VMEbus Interface: A24/D08 (EO) Standard slave interface.
  • VME Addressing: Two jumper blocks provide 256 mapping options in the A24 range.
  • Power consumption: +5VDC @ 450 mA. (non isolated version)
  • Weight: 570 gr. C & I ver.; 770 gr. R+ & 883 ver.
  • Mechanical size: Single slot 6U (233.4x160 mm).
  • Mechanical format:
    • CM-IOC-40/A: IEC-297 mechanics for 19 inch racks with I/O on front panel.
    • CM-IOC-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-IOC-40 Features

  • 16 full-duplex serial channels per board.
  • Channels can be factory fitted to RS-232,RS-423, RS-422, or RS-485 standard levels.
  • Optional full galvanic isolation >1000 Vpon serial channels including handshake lines.
  • Supports a wide set of military or industry standard transceivers from leading vendors.
  • Built-In-Test wraparound loop allows testing of all TTL chips and serial controllers.
  • Serial line Built-In-Test wraparound loop allows testing of all on-board transceivers.
  • Overvoltage protection for most transceivers.
  • 64 LED indicators on front panel show all channel TxD, RxD, CTS, and RTS status.
  • VMEbus Interrupter supplies independent Status-ID vector per serial controller.
  • Serial I/O signals via 160 pin VME64x connectors on front panel, P2 and P0.
  • Versatile baud generator covers any serial rate.
  • Industrial, MIL-Rugged & MIL-883 versions.
  • IEC-297 mechanics with I/O via front panel and military P1101. 2 wedge-lock mechanics.
  • Conduction cooled PCB with thermal overlay in MIL-Rugged and 883 versions.
  • Low power CMOS design.
  • Extensive software support.
  • Excellent price/performance ratio.
  • Two year guarantee.
  • CM-IOC-40 RS-485 Full-Duplex

    RS-485 Full-Duplex

  • CM-IOC-40 RS-485 Half-Duplex

    RS-485 Half-Duplex

  • CM-IOC-40 RS-232/RS-423 Interface

    RS-232/RS-423 Interface

  • CM-IOC-40 RS-422 Interface

    RS-422 Interface

CM-IOC-40 Ordering

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

V (Board Version)
1: 8 serial I/O channels, without galvanic isolation.
2: 16 serial I/O channels, without galvanic isolation.
3: 8 serial I/O channels, with galvanic isolation.
4: 16 serial I/O channels, with galvanic isolation.

T (Board Temperature Range)
C: Commercial. Fiberglass PCB only.
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-IOC-40/3/R+/B with RS-232 levels
- 8 Serial I/O channels RS-232, full galvanic isolation.
- Military Rugged+ range (-40 to +85°C operating).
- IEEE P1101.2 Military mechanics with wedge-locks.


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

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

IMPORTANT: The user must fully specify the serial levels requirements. All serial channels can be factory fitted to operate at RS-232, RS-422, RS-423 or RS-485 (full or half duplex).

Software Support

Wind River Systems VxWorks Tornado: The CM-IOC-40 is supported by VxWorks Tornado. This operating system 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 and user's manual.

Mentor Graphics MCC-68K Drivers: A "C" language source code driver written for the popular MCC-68K cross-compiler from Microtec is also available. 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.