The Mitsubishi QD62 is a high-speed counter module designed for the MELSEC-Q Series PLCs, equipped with two independent channels that support a maximum frequency of 200kHz. Compatible with 5V, 12V, and 24V DC input signals, this module uses a sink transistor output, making it suitable for high-speed counting applications, such as packaging, sorting, and conveyor systems that require precise pulse counting.

Technical Specifications and Supported Programs

    Channels: 2 high-speed counter channels, enabling simultaneous pulse counting across two independent inputs.
    Input Frequency: Up to 200kHz, providing accuracy in high-speed counting scenarios.
    Voltage Compatibility: Accepts DC input signals at 5V, 12V, and 24V, accommodating various sensor types.
    Output Type: Sink transistor output, ensuring reliable response to counted inputs and integration with downstream devices.
    Counting Modes: Supports various counting modes, including up, down, and quadrature counting, suitable for diverse industrial applications.
    Isolation: Optical isolation on each channel to protect against electrical noise and ensure stable operation.
    Wiring: Screw terminals provide secure and stable connections, designed for industrial settings.
    Environmental Conditions:
        Operating Temperature: 0-55°C
        Humidity: 10-90% RH (non-condensing)
        Vibration and Shock Resistance: Meets IEC 61131-2 standards for robustness in challenging conditions.

Supported Programming Software: The QD62 module is compatible with GX Works2 and GX Developer, Mitsubishi’s tools for setting up, monitoring, and troubleshooting high-speed counting applications.

Commissioning Notes and Recommendations

    Installation and Wiring: Install the module in the PLC rack and connect sensors or devices as specified, according to the input voltage requirements (5V, 12V, or 24V DC). Proper grounding minimizes electrical noise.
    Parameter Configuration: Use GX Works2 or GX Developer to configure counting parameters such as frequency, count direction, and reset options.
    Output Testing: Test the sink transistor output to ensure timely and accurate responses under operational conditions.
    Maintenance: Regularly inspect connections and clean terminals to prevent connectivity issues and maintain consistent high-speed performance.

By following these setup and maintenance guidelines, the QD62 module will provide reliable high-speed counting capabilities, making it a suitable choice for industrial automation tasks that require accurate and efficient pulse measurement.

>> Mitsubishi QD62 User manual (pdf)

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