The Acromag QMC440 is a rugged, compact VITA 93 Isolated Digital Input Module. Designed to monitor a wide range of digital signals safely and reliably in demanding embedded applications. Featuring 32 optically isolated input channels across four 8-channel ports. Firstly, the QMC440 ensures protection from electrical noise, ground loops, and transient voltages. Therefore, making it ideal for industrial, aerospace, defence, and lab environments.
Each channel supports individually programmable interrupts. For change-of-state, low-to-high, or high-to-low transitions, enabling responsive, event-driven data acquisition. Built-in debounce logic eliminates false triggering due to electrical noise or contact bounce. Therefore, ensuring clean and accurate edge detection.
The QMC440 has three input voltage ranges: ±4 to ±18V, ±16 to ±40V, and ±38 to ±60V. This allows it to work with many different signal types. Reverse polarity protection, input hysteresis, and software-configurable settings make this module both robust and easy to integrate. No jumpers or switches are required for configuration, allowing fast “on-the-fly” setup and system adaptation.
The QMC440 is part of Acromag’s VITA 93 small form factor (SFF) module line up. Designed for high-density deployment on PCIe carrier cards and platforms such as VPX, CompactPCI, and VNX+. Measuring only 26 x 78.25mm, it’s perfect for space-, weight-, and power-constrained applications. For added diagnostic capability, the QMC440 is fully compatible with the QMC450 digital output module. Therefore, supporting loopback monitoring for system self-tests and fault detection.
Key Features:
32 optically isolated digital input channels
Inputs grouped into four isolated 8-channel ports
Three voltage range options: ±4–18V, ±16–40V, ±38–60V
Programmable interrupts: change-of-state, rising/falling edge
Software-configurable debounce for noise rejection
Input hysteresis and reverse polarity protection
No hardware jumpers or switches required
Loopback compatibility with QMC450 for fault detection
Compact 26 x 78.25mm form factor (VITA 93 compliant)
PCIe bus communication via carrier card
Extended temperature range and conduction-cooled support
IPMI support for platform management
Applications:
Industrial automation and control
Aerospace and defence system monitoring
Digital signal event tracking
Safety interlock and fault detection
Loopback testing and closed-loop verification
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Or to find out more about VITA 93 Standard click on this article.
