QMC440: 32-Channel Isolated Digital Input QMC Module

32 isolated digital inputs for status acquisition

The QMC440, which completes the Acromag range of embedded solutions, provides 32 bipolar digital inputs for monitoring discrete field signals.

Inputs are arranged as four groups of eight channels, each with a separate common. The ports are isolated from one another and from the host PCIe logic.

This isolation helps protect the host system from noise, transients and field-wiring faults while providing high-density digital monitoring in the compact VITA 93 form factor.

Three input-voltage ranges

Three electrical configurations are available:

Inputs also provide reverse-polarity protection and hysteresis.

This enables the same QMC platform to address different field-signal voltage levels.

Per-channel interrupts and programmable debounce

Every input channel can generate interrupts on:

• low-to-high transition;
• high-to-low transition;
• change of state.

Debounce is selectable at 4 µs, 64 µs, 1 ms or 8 ms.

Typical response time is 15 µs ON-to-OFF and 35 µs OFF-to-ON.

These functions help reject switching noise while preserving independent event detection across all 32 channels.

VITA 93 with PCIe and rugged cooling options

The QMC440 uses the VITA 93 QMC form factor and a PCI Express 2.1 Gen1 x1 interface at 2.5 Gbps.

Two cooling versions are available:

• QMC441 – air cooled, 0 to +70°C at 200 LFM;
• QMC442 – conduction cooled, -40 to +85°C.

USW-API software support covers Windows, Linux and VxWorks.

Its compact 78.25 × 26 mm footprint makes it suitable for high-density I/O systems, including industrial applications and selected Defense, Aerospace & Security platforms.

Versions