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Description
Overview
Essential details：VMIVME-1160A-123 32-bit Optically Coupled Digital Input with Change-of-State Interrupts
Products Description
• 32 optically coupled digital inputs
• 5V to 48VDC input range— Voltage sourcing— Current sink/contact sense (internal pull-up resistors available)
• High isolation
• Input debouncing option for both make and break contac
• Does not require form C (single-pole double throw) input signals ts
• Interrupt available on both rising edge and falling edge
• Change-of-State interrupts on any of seven levels eliminate CPU polling overhead
• Positive or negative true input options
• Nonprivileged short I/O, supervisory e connectors short I/O, or both
• High reliability DIN-typ
• 8- or 16-bit transfers
VMIVME-1160A
Overview: This product is designed with standard Change-ofState (COS) control and interrupt logic that detects any COS and provides an interrupt vector to the byte level. It incorporates an MC68153 Bus Interrupter Module (BIM) and interrupts are supported on any of seven levels. Each byte (8 bits) of input may have a unique interrupt vector that is generated upon a COS in any bit of that byte. This product also has an Interrupt Enable Register which is used to allow interrupts to be enabled on a byte-by-byte basis. The input data may be accessed as a D8 or D16 transfer.
A functional block diagram of this product is shown in Figure 1. Interrupts are generated on any COS (positive or negative transition). Polarity is determined by reading the input port after the COS interrupt.
Positive/Negative True Ordering Information: This board may be ordered with positive or negative true data. For positive true boards, when current flows in the opto-isolator diode, a logical one will be presented to the VME.
For negative true boards, when current flows in the optoisolator diode, a logical zero will be presented to the VME. In either case, the data sent to the BIM is always positive true and not affected by the ordering option.
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