RS232 / RS422 / RS485

RS232 / RS422 / RS485


See SC-X for newest architecture.

For multifunction embedded boards, this sophisticated high-speed communications module supports intelligent, full duplex communications that can be individually software-configured for either RS-232C, RS-422, or RS-485 Synchronous or Asynchronous Communication. The architecture avoids latency problems because all data transfer is done in hardware and not in software. Any incoming data, no matter how many RS-232C, RS-422, or RS-485 Synchronous or Asynchronous channels are active, in whatever mode, can be immediately extracted. A BREAK sequence capability is also incorporated. Bus Data is transferred within 300 ns. FPGA design simplifies programming and usage.


  • An Internal Loop Back Self-Test is performed when power is applied, and results are stored in registers. Each channel can be programmed into a Loop Back mode that internally wraps the transmitter around the receiver without the need of external wiring.
  • An additional asynchronous mode to support “Immediate Transmit” operation results in Serial Data Transmit Enhancement. Each channel has its own 32 Kbyte Transmit and Receive buffer.
  • A Receiver Enable/Disable function allows the user to turn selected receivers ON/OFF.
  • This serial card can operate in an Interrupt Driven Environment to provide notification of all events to the system. When a flow control mode is selected, the serial card does the operation automatically with minimal system intervention.
  • Multi-Drop Link Mode. The transmitter and receivers of up to 32 cards can be tied together in either Half or Full Duplex mode.


Click below for manuals and specifications:

KBTwo High Speed Serial Communications with I/O ComboN/AContact Factory at 1 (631) 567-1100
P8RS-232/422/485(Module P8) - Four High Speed RS-232, RS-422, RS-485N/AContact Factory at 1 (631) 567-1100

Function module(s) featured in products below:

ModelBoard TypeFunction Module SlotsBoard ArchitectureSizeOn Board ReferenceEthernetOtherMaster / Slave
76C2PCI3 1/2N/A    
64C3VME6BF533 / Cyclone® III Y2 x Gb Both 
64C2VME 6BF533 / Cyclone® II Y1 x Gb Slave 
64CS4VME5BF533 / Cyclone® II Y1 x GbHigh power D/S capableSlave 
76CS3PCI5 FullY High power D/S capable  
79C3PCIe3 1/2N/A    
75C33U cPCI2 + 1/2S/B Cyclone® II  1 x Gb Slave 
75C53U cPCI2 + 1/2BF533 / Cyclone® III  1 x Gb Both 
78C26U cPCI6BF533 / Cyclone® II Y1 x GbHigh power D/S capableSlave 
78CS26U cPCI5BF533 / Cyclone® II Y1 x Gb Slave 
67C36U OpenVPX6BF533 / Cyclone® III Y2 x Gb Both 
68C33U OpenVPX2 + 1/2BF533 / Cyclone® IV  2 x Gb Both 
ModelBoard TypeProcessorFunction Module SlotsMaximum MemoryMaximum StorageVideo OptionsEthernetAvailable O/S
75SBC43U cPCI SBCNXP® QorIQ® P2041 Quad-Core e500mc Processor @ 1.2 GHz14 GB DDR3 SDRAM32 GB SATAII NAND FlashN/A2 x GbWind River® Linux or VxWorks®
ModelPhotoBoard TypeDimensions w/Connectors (w x h x d)Volume w/Connectors (in3)Weight / lbs (fully populated)Est. Typ. Power Dissipation (W)# of Board SlotsFunction Module SlotsMax I/O PinsEthernet
SIU66U11.75" x 3.35" x 8.65"340.49<14.012 to 60 W2123162 x Gb