SPI 3 - Serial PROFIBUS Interface

Connecting Serial Devices to PROFIBUS Networks

By using the SPI 3, devices with serial interface are integrated in PROFIBUS as DP slaves. Depending on the application, various protocols and physical interfaces are available. In decentralized PROFIBUS installations, the SPI 3 replaces the serial interface inside the PLC. The SPI 3 is configured via the respective PROFIBUS DP master by means of the SPI 3 GSE file. The PROFIBUS IO range can be flexibly configured. The SPI 3 is suitable for simple applications, such as connecting text displays or barcode scanners, as well as for more complex applications such as the integration of identification systems, scales, controllers and laboratory equipment.


  • Integration of devices with serial interface as DP slave devices in PROFIBUS networks
  • Available for various protocols and physical Interfaces


  • DP slave with transmission rate of 9.6 kbit/s up to 12 Mbit/s
  • Serial transmission rate of 110 bit/s up to 57.6 kbit/s (depending on the protocol)
  • Serial interface available as RS 232, RS 422 or RS 485
  • Configuration with GSD file via the PROFIBUS DP master

Order Information

Scope of Delivery  
Hardware SPI 3
Documentation On Website
Order Numbers  
GPA-NS-011236 SPI 3 RS 232
GPA-NS-011237 SPI 3 RS 422
GPA-NS-011238 SPI 3 RS 485

Softing Industrial


+49 89 456 56-340

Callback Service

USA, Canada and Mexico

+1 865 251-5252

Callback Service