Schneider Electric BMXDAI1604: High-Density 120V AC Input Module

Directly connect high-voltage AC sensors with the Schneider Electric BMXDAI1604. This specialized digital input module for Modicon M340/M580 systems provides 16 isolated channels for 100-120V AC signals. It’s designed for direct interfacing with industrial limit switches, pushbuttons, and contact outputs without needing external relays. The module supports both 2-wire and 3-wire proximity sensors, offering installation flexibility. With robust channel diagnostics and high MTBF, it ensures reliable monitoring in demanding plant floor applications.

Core Technical Specifications

• Brand & Model: Schneider Electric BMXDAI1604
• Product Line: Modicon M340 / M580 (X80 Platform)
• Input Type: 16 Isolated Capacitive AC Inputs
• Input Voltage: 100-120V AC
• Operating Frequency: 50/60 Hz (47-63 Hz range)
• Input Current: 5 mA
• Sensor Supply Range: 85-132V AC
• Response Time: Activation 10 ms, Deactivation 20 ms
• Input Impedance: 13 kOhm
• Power Dissipation: ≤ 3.8 W
• Isolation: 1500V AC (channel to logic)
• MTBF Reliability: 1,504,958 hours
• Operating Temperature: 0°C to 60°C
• Protection Rating: IP20
• Certifications: CE, CSA, UL, RCM, EAC
• Weight: 0.115 kg (module), ~2.07 kg in full packaging

Key Features & Benefits

Direct High-Voltage Interface: Eliminates the need for interposing control relays when connecting to standard 120V AC field devices. This simplifies cabinet design, saves space, and reduces points of failure.

High-Density & Isolated Channels: Sixteen fully isolated input channels in one module maximize I/O count per rack slot. Isolation protects the PLC's internal electronics from voltage spikes or faults on the field side.

Comprehensive Diagnostics: Each channel features a green status LED. Module-level LEDs (RUN, ERR, I/O FAULT) provide instant health status, enabling fast troubleshooting and reduced downtime.

Exceptional Reliability: With an MTBF exceeding 1.5 million hours, this module is engineered for continuous operation in industrial environments, providing long-term stability for critical processes.

Wide Sensor Compatibility: Works with standard 2-wire and 3-wire AC proximity sensors (IEC 60947-5-2 & IEC 61131-2 Type 3), offering flexibility for various sensing applications.

Typical Applications

• Connecting 120V AC machine control devices like selector switches, manual overrides, and maintenance bypass controls.
• Monitoring the status of motor contactors and overload relays directly.
• Interfacing with existing plant floor equipment that uses 120V AC control signals.
• High-voltage input applications in water/wastewater, material handling, and HVAC systems.

Reliable Support & Fast Delivery

This specialized module is covered by our 12-month warranty. To minimize project delays, we provide expedited global shipping options through FedEx, UPS, and DHL.

Frequently Asked Questions

What does "capacitive" input type mean?

It refers to the internal input circuit design. A capacitive input provides good noise immunity for AC signals. For the user, it means compatibility with standard AC devices and a well-defined ON/OFF voltage threshold.

Can I use this module with 240V AC signals?

No. The BMXDAI1604 is strictly rated for 100-120V AC. Applying 240V AC will damage the module. A different module, such as one rated for 240V AC, must be used for higher voltages.

Is an external fuse required?

Yes. The specification requires one external 0.5A fast-blow fuse per group of input channels for short-circuit protection. This is a critical safety component.

How does it handle a 2-wire AC proximity sensor?

The module supplies a small leakage current (sensor power supply: 85-132V AC) to power the 2-wire sensor. When the sensor activates, it draws enough current (≥2.5 mA) to be detected as an ON state by the input circuit.

What is the difference between activation and deactivation time?

Activation time (10 ms max) is the delay from the field signal turning ON until the PLC sees it as a logic 1. Deactivation time (20 ms max) is the delay from the field signal turning OFF until the PLC sees it as a logic 0. This is typical for AC inputs due to the zero-crossing of the waveform.

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