Mitsubishi A1SX81 Module

Important Note: The A1SX81 is not a CPU module, but a 32-point DC-sourcing type digital input module of the Mitsubishi MELSEC AnS/QnAS series. It belongs to the I/O expansion module of the A-series PLC and must be used with an A-series CPU (such as A1SHCPU, A2ASCPU, 等).

1. 機種説明

2. コア技術パラメータ

3. 機能的な特徴
4. Dual-voltage Compatibility: Supports both DC12V and DC24V input voltages to meet the requirements of different field devices.
5. Photoelectric Isolation: Ensures reliable isolation between input signals and the internal circuit of the PLC, with strong anti-interference capability.
6. Flexible Response: The response time can be set via programming software to adapt to the requirements of different signal frequencies.
7. Grouped Common Terminals: 32 points are divided into 4 groups (8 points per group), each with an independent common terminal, improving system safety and flexibility.
8. Quick Wiring: Adopts a quick connector design, greatly reducing installation and maintenance time.
9. Wide Temperature Design: Adapts to harsh industrial field environments with a wide operating temperature range.
10. 高い信頼性: Mitsubishi industrial-grade quality with a long MTBF (Mean Time Between Failures).
11. 適用範囲

The A1SX81 module is suitable for industrial automation scenarios that require collecting a large number of DC digital signals, 含む:

1. Manufacturing Industry: Automatic production line control, such as sensor signal collection and limit switch status detection.
2. Machinery Processing: Signal input of buttons, トラベルスイッチ, and proximity switches for machine tools and equipment.
3. ビルディングオートメーション: Status monitoring of elevator control systems, air conditioning systems, and lighting systems.
4. プロセス制御: Detection of valve positions and pump operation status in industries such as chemical engineering, 電力, and water treatment.
5. その他: Any PLC control system that requires 32-point sourcing type digital input, especially suitable for occasions where DC12V and DC24V are mixed.
6. 選択の推奨事項

5.1 選定のポイント

5.2 代替モデルと互換性

5.3 Supporting Usage Recommendations

1. CPU Module: AnS series CPUs such as A1SHCPU, A2ASCPU, A2USHCPU, 等.
2. 電源モジュール: A-series power supply modules such as A1S61P, A1S62P, A1S63P, 等.
3. Expansion Rack: A-series basic/expansion racks such as A1S33B, A1S35B, 等.
4. Programming Software: GXワークス2 (supports AnS series) or GX Developer (old version)
5. トラブルシューティングガイド

6.1 一般的な障害と解決策

6.2 Explanation of Module Indicator Light Status

7. 設置およびメンテナンスの注意事項
8. Before Installation:

Confirm that the module model matches the system requirements.

Check that the module has no external damage and connectors are not bent.

Prepare suitable quick connectors and wiring terminals.

2. During Installation:

Install after cutting off the power supply of the PLC system.

Align with the rack guide rail, insert smoothly and lock securely.

Wire correctly according to the module terminal diagram, distinguishing between common terminals and signal terminals.

Ensure that the wiring is firm to avoid poor contact caused by loosening.

3. During Maintenance:

Regularly check the module temperature to avoid overheating.

Clean dust on the module surface to maintain good ventilation.

Inspect connectors and wiring to prevent oxidation or loosening.

Avoid frequent plugging and unplugging of the module to extend its service life.

8. まとめ

The A1SX81 is a practical 32-point dual-voltage compatible sourcing type input module in the Mitsubishi MELSEC AnS series PLC. With its flexible voltage adaptation, reliable isolation design and convenient installation method, it is widely used in various industrial automation control systems. 選択中, attention should be paid to distinguishing between sourcing type and sinking type inputs. 交換用, upgraded models such as A1SX81-S2 can be considered. Troubleshooting should follow the principle of “hardware first, then software” to ensure stable system operation.

Parameter Comparison Table of A1SX81 and Its Same-series Modules & 代替モデル

The following is a detailed comparison between A1SX81 and its core same-series models, as well as alternative solutions from the AnS series to the L/iQ-R series, facilitating quick selection and upgrade decisions.

1. Core Parameter Comparison Table of A1SX81/A1SX80/A1SX81-S2

2. Key Difference Analysis and Selection Recommendations

2.1 Core Difference Points

1. 入力タイプ: A1SX81/A1SX81-S2 are sourcing type, suitable for PNP sensors; A1SX80 is sinking type, suitable for NPN sensors. This is the most fundamental basis for selection.
2. 電圧の互換性: A1SX81/A1SX80 support DC12V/DC24V dual voltage, while A1SX81-S2 only supports DC24V but has a faster response time.
3. 応答時間: The standard response time of A1SX81/A1SX80 is 25ms (can be set to 1/5/10/25ms); the standard response time of A1SX81-S2 is 10ms (can be set to 1/5/10ms), which is more suitable for high-frequency signal collection.

Choose A1SX81: PNP input is required, and there are DC12V and DC24V mixed devices on site.

Choose A1SX80: NPN input is required, and there are DC12V and DC24V mixed devices on site.

Choose A1SX81-S2: PNP input is required, in a pure DC24V environment with high requirements for response speed.

3. Parameter Comparison Table of Common Alternative Models

3.1 Internal Alternative Models of the AnS Series

3.2 Upgrade Alternative Solutions (AnS → L/iQ-R Series)

4. 交換時の注意事項
5. Hardware Compatibility:

Internal replacement within the AnS series: 完全な互換性, the module can be directly replaced without modifying the program.

Upgrade to the L/iQ-R series: The entire system (CPU, 電源, モジュール) needs to be replaced, but part of the programming logic can be reused.

2. Software Settings:

Same-series replacement: Only need to confirm the module model in GX Works2/GX Developer.

Cross-series upgrade: Need to reconfigure I/O addresses, and some function blocks may need to be adjusted.

3. 配線方法:

AnS series: Quick connector (37-pin D-Sub).

L/iQ-R series: Terminal block or quick connector, requiring rewiring.

4. Cost Considerations:

Same-series replacement: 低コスト, suitable for equipment maintenance.

Cross-series upgrade: High initial investment, but significant long-term benefits (energy saving, メンテナンス, expansion).

5. まとめ

As a classic 32-point sourcing type input module of the Mitsubishi AnS series, the A1SX81 is widely used in the field of industrial automation due to its dual-voltage compatibility and flexible response characteristics. 選択中, priority should be given to selecting the input type according to the sensor type (PNP/NPN), and then selecting the specific model according to the voltage requirements and response speed.