Opis

The 104-II32-4RO is a 36-channel PC/104 utility board featuring 32 optically isolated digital inputs with change of state (COS) interrupt generation and 4 handy electromechanical relay outputs. The board provides connections to an assortment of devices including sensors, switches, controllers, powered circuits, and other user inputs. The inputs may be driven by either DC sources of 3-31V (or higher by special order) or AC sources at frequencies of 40Hz to 10kHz. Optically isolating the digital inputs from each other, and from the computer, assures smooth, error-free data transmission in noisy, real-world environments. The 104-II32-4RO can be used in a variety of PC/104 applications such as embedded SCADA systems, industrial automation, process control, scientific apparatus, and embedded OEM.

Each input circuit includes a jumper selectable filter to accommodate AC inputs and is also useful for slow DC inputs in noisy environments. The filter may be manually disabled to improve the board’s typical response time to 10µs when used with faster DC inputs. To prevent erroneous input state change detections and interrupts, Schmitt triggers are used which provide a reliable logic signal to the computer interface. The electromechanical relays are more flexible than FET and solid state outputs in regards to the kind of signals that can be switched. Another useful feature of the board is a fused +5V general purpose output at the connector.

System interrupts are software controlled, enabling the board to generate an interrupt whenever one or more of the isolated digital inputs changes state. This eliminates the need for constant polling and greatly frees up system resources. IRQ sharing with other system devices is enabled for simplified system delelopment and installation.

• 32 optically-isolated, non-polarized digital inputs
• Change of State (COS) detection selectable on nybble basis
• Interrupt sharing for simplified system development
• 3 to 31 volt AC or DC signals
• Switchable filters
• Schmitt trigger buffers
• I/O access with register definitions provided