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IO203: Digital I/O Module with 64 TTL Channels

Parallel digital I/O module with 64 TTL channels, individually programmable as inputs or outputs

This I/O module is a dedicated digital I/O module providing a total of 64 TTL channels. The TTL transceivers are TTL and CMOS/TTL compatible and can be configured as CMOS compliant with the Setup driver block. Each of the 64 channels can be individually programmed as input or output. The 64 channels are separated into two groups of 32 channels. Each group is accessed via a single bus access cycle which leads to a simultaneous update of each group with very low latency.

Digital Inputs/Outputs

  • 64 TTL channels, grouped into 2 x 32 channels
  • Each channel individually programmable as input or output
  • TTL, CMOS/TTL, CMOS compatible transceivers
Form factor PMC
PCI bus 32-bit, 33MHz
Power requirements 0.7W max
Connector 68-way SCSI3
Cable connectors: Tyco Electronics
Board connector: Tyco Electronics part no. 5749069-7
Operating temperature -40 to +85°C
Humidity 5 to 95% non-condensing
Digital I/O  
Configuration 64 channels, each channel individually programmable as input, output or tri-state.
Compatibility TTL (TTL, CMOS/TTL, CMOS)
Maximum current ±24mA (available for 3.3V usage only)
Transceiver 74LVT126
Protection ESD and overvoltage for each channel
Mean time between failures (MTBF)* 419,000 hours
MTBF (Mean Time Between Failure) - MTBF values shown are based on calculation according to MIL-HDBK-217F and MIL-HDBK-217F Notice 2; Environment: GB 20°C. The MTBF calculation is based on component FIT rates provided by the component suppliers. If FIT rates are not available, MIL-HDBK-217F and MIL-HDBK-217F Notice 2 formulas are used for the FIT rate calculation.
Item ID Product Name Components
20203X IO203
  • 1 x IO203
  • 1 x shielded round 68-pinSCSI3 to 68-pin MDR cable, 1.62m (6ft) long
  • 1 x 68-pin spring-loaded terminal board with DIN-rail mount
  • Driver block library for Simulink Real-Time™
  • Installation into real-time target machine

Key to X in Item ID
Please replace the X with the code number of the specific target machine into which this I/O module shall be installed:

  • 5 = Mobile real-time target machine
  • 6 = Performance real-time target machine
  • 8 = Baseline real-time target machine

Pricing information
We don't publish pricing information on our website. Upon request by e-mail or phone we can provide a complete price list covering our entire product portfolio in various currencies. We recommend that you get in touch with us to discuss your specific needs. We can then quickly provide you with a tailored quotation including technical and pricing information.


Included in delivery

  • I/O module installed into real-time target machine
  • Cable
  • Terminal board
  • Simulink driver blocks
  • Test models
  • Comprehensive documentation


Supported target machines


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