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Mitsubishi Electric's MELSEC-A series included the AX81-S1 DC digital input device, which is no longer produced. It functions as an essential I/O device for industrial automation systems, managing 32 digital input points at 24 VDC. The unit's primary function is to accept input signals from digital devices, enabling accurate data gathering and trustworthy control in industrial applications. For integration with automation systems, its responsiveness and small form make it an excellent choice.
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| Manufacturer | Mitsubishi |
|---|---|
| Product Line | A Series |
| Part Number | AX81-S1 |
| Weight | 10.00 lbs (4.54 kg) |
| Name | Input module |
| Input points | 32 points |
| Voltage | DC12/24V |
| Current | 2.5/5mA |
| Response time | 10ms |
| Input configuration | 8 points per common end |
| Terminal station | 38 points |
| Scan cycle | Input sample, Program execution, Output refresh |
| Input refresh process | New state read during program scanning phase |
| CPU speed | Determines scan cycle length |
| Output mode | Centralized |
| Input/Output hysteresis | Exists |
Mitsubishi Electric produces the AX81-S1 DC digital input unit, which is a crucial I/O component for industrial automation systems and is a part of the MELSEC-A family. It has thirty-two (32) connector points for connecting different digital devices and is built to handle digital inputs. It runs on 24 volts DC power supply. To enable smooth integration with other devices, the unit may be set up as either a Sink or Source. Its primary function is to obtain input signals from digital devices and transmit them to the automation system to provide precise data collecting and dependable control in industrial settings. A scan cycle on the AX81-S1 is broken up into input sampling, program execution, and output refresh. It uses a centralized sampling and output mode. Its 10 ms reaction time makes it very sensitive to changes in the input signal. A possible discrepancy during program execution is avoided by the input refresh mechanism, which makes sure that new input states are read-only during the program scanning phase. Because of the unit's small size, effective and well-organized wiring is possible. It has eight (8) points per common end and a common positive/negative termination. It is appropriate for many industrial uses, such as manufacturing, process control, and robotics, where accurate monitoring and control of digital inputs are crucial. The AX81-S1 may still be utilized in current systems as a replacement component despite being considered discontinued. The AX81-S1 is the perfect option for industrial automation needs because of Mitsubishi Electric's dedication to providing a reliable product.