Serial Profibus interface : SPI3

  • Coupler for integrating devices with serial interface as DP slave devices in PROFIBUS
  • replaces the serial interface in the PLC in decentralized PROFIBUS installations
  • 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
Nominal supply voltage 24 V DC (19.2 … 28.8)
Current consumption max. 200 mA
Ambient temperature range 0 … +75°F
Transmission rate serial 110 Bit/s up to 57.6 kBit/s (depending on the protocol)
Interface serial RS 232, RS 422, RS 485 (interface as per order)
Protocols serial Free ASCII driver, 3964R, RK512, MODBUS RTU
Transmission rate PROFIBUS 9.6 kBit/s up to 12 MBit/s
Interface PROFIBUS RS 485
IO Range PROFIBUS 2, 4, 8, 16, 32, 64 data words (depending on the protocol)
Case, protection class Plastic, IP 20
Mounting 35 mm DIN top hat rail
Dimensions W x H x D 75 x 75 x 53 mm
Weight 136 g
Certificate CE | UL
GPA-NS-011236 SPI 3 RS 232
GPA-NS-011237 SPI 3 RS 422
GPA-NS-011238 SPI 3 RS 485

Scope of Delivery

SPI 3, Installation Guide
By Download Docu and Media Kit (includes online documentation, GSE, function blocks for SIMATIC S5 and S7, example projects); Release Note