• 48 Channel Bi-Directional TTL Digital I/O Board
• 8255 PPI Mode 0 to Mode 2

Block Diagram                  
PIN Assignment                  Circuitry

• No. of channels: 48
  
• Type: Bi-directional TTL level (positive logic) / all channels have common ground
  
• I/O interface: Two 8255A-5 programable peripheral interface ICs
  
• Programmable mode: 8255 PPI Mode 0 to Mode 2
  
  

• Pull-up resistor: 10K Ohms
  
  

• output rating: +5 VDC 1mA max. (equivalent to 2LS-TTL load)
  
  

• Interrupts: 4 maximum interrupts can generate an interrupt to IRQ 2 to 7
  
• Throughput rate: 200 ns max.
  
• I/O address: Any 16-byte boundary
  
• Power consumption: +5 VDC 430 mA max.
  
• Connectors:
  CN1:37-pin D-shell
  CN2:30-pin
  
• Dimensions: 7.3" x 4.2" (187mm x 107mm)

• API-PAC(W32)
  
• ACX-PAC(W32)BP Ver.2.0.
  
• DDE-SERVER(W32)
  
• VI-DAQ for LabVIEW
  
• SUPPORT PAC(PC)603
  
  

• 48 bi-directional TTL digital I/Os
  
• Two 8255 PPIs on board
  
• 8255A-5 PPI mode 0 - mode 2
  
• 4 interrupt lines