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Serial I/O Module Supporting RS232/RS422/RS485

The IO504 I/O module is a 8-channel, RS232-, RS422- and RS485-capable asynchronous serial module with Simulink® driver blocks.

The serial channels offer the highest flexibility as they are individually programmable. The maximum supported baud rate for RS232 is 921.6 kbps and 5.5296 Mbps for RS422/RS485. The termination is software-selectable for RS422 and RS485.

This I/O module is ideal for closed-loop controls and hardware-in-the-loop (HIL) simulations using MATLAB® and Simulink®.

Key Features

  • 8 channels individually programmable as RS232, RS422 or RS485 (half and full duplex)
  • RS232 baud rate up to 921.6 kbps
  • RS422/RS485 baud rate up to 5.5296 Mbps
  • Software-selectable termination (120 Ω)
  • 64-byte hardware FIFO
Form factor PMC
Power requirements 40 mA typical @ +5V DC (Shutdown, no load)
55 mA typical @ +5V DC (RS232, no load)
115 mA typical @ +5V DC (RS422, no load)
440 mA typical @ +5V DC (RS485 FD Master, no load)
400 mA typical @ +5V DC (RS485 HD, no load)
45 mA typical @ +3.3V DC (no load)
Electrical interface 32 bit/33 MHz, Revision 2.3 compliant
Connectors 50-pin male SCSI2
Operating temperature -40ºC to +85ºC
Relative humidity 5 to 95%, non-condensing
Number of channels 8
Physical interface Software-selectable RS232, RS422, RS485 (half and full duplex)
Programmable baud rates RS232: up to 921.6 kbps
RS422/RS485: up to 5.5296 Mbps
I/O signals RS232: TxD, RxD, RTS, CTS, GND
RS422/RS485 half duplex: Dx +/-, GND
RS422/RS485 full duplex: TxD +/-, RxD +/-, GND
Termination Software-selectable 120 Ω
Protection ±15 kV ESD rating
Mean time between failures (MTBF)* 530,000 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
  • 1x IO504 I/O module
  • 1x 50-pin male SCSI2 to 50-pin male MDR cable, (6 ft/1.82 m)
  • 1x 50-Pin Female MDR Terminal Board
  • Driver block library for Simulink® Real-Time™
  • Comprehensive documentation and Simulink® example models
  • Installation into the 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

Supported target machines


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