Multibus-International

Model: SBC556

Manufactured by: Intel Corporation

• Up to 48 Optically Isolated Digital I/O Lines

• Choice of:24 Fixed Input Lines

• 16 Fixed Output Lines

• 8 Programmable Lines

• Provisions for Plug-in, Optically Isolated Receivers, Drivers, and Terminators

• Voltage/Current Levels

• Input up to 48 V

• Output up to 30V, 60 mA

• Common Interrupt for up to 8 Sources

• +5V Supply Only

The SBC556 Optically Isolated I/O Board provides 48 digital input/output lines with isolation between process application or peripheral device and the system CPU board(s).  The SBC556 contains two 8255A programmable interface devices. Sockets are supplied for 2user-supplied optically isolated drivers, receivers, and input resistor terminators, together with common interrupt logic and interface circuitry for the system bus.  Input signals can be single-ended or differential types with user-defined input range (resistor terminator and opto-isolated receiver selection), allowing flexibility in design of voltage an threshold levels.

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