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IO504: 8 Port Serial I/O Module

8 port serial I/O module supporting RS232, RS422 and RS485, with Simulink driver blocks

This is a very versatile asynchronous serial module supporting RS232, RS422, or RS485 on each of the 8 ports individually. It supports very high baudrates, especially for RS422 and RS485. The Simulink Real-Time driver blockset for this module offers a composite Send/Receive block as well as low-level setup, send, receive, FIFO, status, and utility blocks.

  • 8 independent serial ports
  • Supports RS232, RS422, RS485 half-duplex, and RS485 full-duplex
  • RS232 baud rates up to 921.6kb/s
  • RS422/RS485 baud rates over 5Mb/s

Galvanic isolation is available with the IO505 I/O module.

Form factor PMC
PCI bus 32-bit, 33MHz
Power consumption 2.5W, maximum
Operating temperature -40ºC to +85ºC
Relative humidity 5 to 95%, non-condensing
Interface type Asynchronous serial
Number of channels/ports 8
Physical interface Software-selectable per channel: RS232, RS422, RS485 full-duplex, RS485 half-duplex
Programmable baud rates RS232: up to 921.6kb/s
RS422/RS485: up to 5.5296.6Mb/s
I/O signals RS232: TxD, RxD, RTS, CTS, GND
RS422/RS485 full-duplex: TxD+/-, RxD+/-, GND
RS422/RS485 half-duplex: Dx+/-, GND
Termination Software-selectable (120Ohm)
UART Exar X17D158
Transceiver MAX3161E
ESD protection ±15kV
Mean time between failures (MTBF)* 620,000 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
20504X IO504
  • 1 x IO504 I/O module
  • 1 x shielded round 50-pin SCSI-II cable, 1.5m long
  • 1 x 50-pin screw 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 the 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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