The SCM5B48 is an isolated and field-configurable accelerometer input module that provides excitation to piezoelectric sensors with built-in microelectronic amplifiers (ICP and IEPE). The module provides a constant current excitation to the sensor. It then isolates, filters, and amplifies the sensor output, yielding a high-level analog voltage output. The excitation current, signal gain, and filter high-pass and low-pass cut-off frequencies are configurable through a set of slide switches.

Six poles of signal filtering in the SCM5B48 module result in greater than 100 dB of normal-mode rejection for signal frequencies above the cut-off frequency. One pole of filtering is on the field side of the isolation barrier for antialiasing purposes. The remaining five-pole programmable filter is located on the system side. High-pass filtering is achieved through a second-order passive filter located on the field side.

To ensure protection of expensive data acquisition equipment, the SCM5B48 module signal inputs and sensor excitation outputs are protected against accidental connection of voltages up to 240 VRMS. The high-performance isolation barrier breaks ground loops, allows operation at high common-mode input voltages, and rejects large common-mode spikes, all of which contribute to the preserving of signal integrity while maintaining a high level of accuracy and low output noise.

Measuring only 2.28² × 2.26² × 0.6², the SCM5B signal conditioner is smaller than similar products, making it ideal for applications where space is at a premium.

Prices for the SCM5B48 modules start at $250.

Dataforth Corporation
www.dataforth.com