User`s manual

2 Introduction
72XX Series
User’s Manual
PC Low. Each connector corresponds to one PPI chip with 24 DIO
points. PCI-7224/7248/7296 are equipped with one, two, and four
50-pin male ribbon connectors respectively. The cPCI-7248 is
equipped with one 100-pin SCSI-type connector.
1.1 Features
The 7248/96 series products provide the following advanced fea-
tures:
1.1.1 Digital I/O Ports
 24/48/96 TTL/DTL compatible with digital I/O lines
 Emulates industry standard mode 0 of 8255 PPI
 Buffered circuits for higher driving
 Direct interface with OPTO-22 compatible I/O module
 Output status read-back
1.1.2 Timer/Counter and Interrupt System
 A 32 bits timer to generate watchdog timer interrupt
 A 16 bits event counter to generate event interrupt
 Programmable interrupt source
 Dual interrupt system
1.1.3 Miscellaneous
 Provide 12V and 5V power supply on OPTO-22 connectors
 On board reset-able fuses to protect power supply for exter-
nal devices
1.2 Applications
 Programmable mixed digital input & output
 Industrial monitoring and control
 Digital I/O control
 Contact closure, switch/keyboard monitoring
 Connects with OPTO-22 compatible modules
 Useful with A/D and D/A to implement a data acquisition
and control system