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IO753: Modbus TCP Client I/O Module

Modbus TCP Client I/O module, with Simulink® driver blocks

The IO753 I/O module is a Modbus TCP module to connect real-time target machines to external industrial devices such as motor controllers, sensors, I/O stations and robots.

The IO753 handles the complete data exchange between the connected Modbus TCP servers and the real-time application. The data exchange is processed via a dual-port memory. The module acts as one Modbus TCP client exclusively.

This I/O module is ideal for rapid control prototyping of industrial devices such as programmable logic controllers (PLC) and hardware-in-the-loop simulations using MATLAB® and Simulink® for testing industrial equipment such as motor controllers. 

The IO753 I/O module is fully compatible with the Simulink® Real-Time™ workflow. The extensive Simulink® Real-Time™ driver blockset offers comprehensive functionality and firmware updates are easily available, as the Setup driver block downloads microcontroller firmware each time a target application is initialized.  

Key Features


  • 2x 10BASE-T/100BASE-TX isolated, auto-crossover function Ethernet connectors enable easy network integration
  • Easy network configuration directly in Simulink®
  • DMA enables fast data exchange on PCI bus
Form factor PCI/PCIe/mPCIe 
Power requirements 650 mA @ +3.3 V DC 
Bus 32 bit/33 MHz, Revision 3 of PMC specification, P1386.1
Connectors 2x RJ45 socket
Operating temperature 0 °C to +55 °C
Certification CE
I/O Access  
Maximum number of linkable servers 16
Maximum length of RX data   5760 bytes overall 
Maximum length of TX data   5760 bytes overall 
Modbus function codes   1, 2, 3, 4, 5, 6, 15, 16 
Maximum number of coils/registers per telegram 
  • 125 (FC3, FC4)
  • 123 (FC16)
  • 2000 (FC1, FC2)
  • 1968 (FC15) 
Maximum number of configurable Modbus commands  256
Baud rate 10 and 100 MBit/s 
Data transport layer  Ethernet II, IEEE 802.3
Item ID Product Name Components
2X753* IO753
  • 1 x IO753
  • Driver block library for Simulink® Real-Time™
  • Comprehensive documentation and Simulink® example models
  • 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:

  • A = Performance real-time target machine (PCI)
  • B = Performance real-time target machine (PCIe)
  • C = Mobile or Baseline real-time target machines (mPCIe)

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.

IO753: Modbus TCP Client (master) I/O module 

Included in the Delivery

Common Applications

Supported target machines


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