Signal conditioner interfaces with accelerometers
Staff -- Test & Measurement World, 6/1/2006
The latest member of Dataforth's SCM5B family of isolated analog signal-conditioning devices is a field-configurable accelerometer input module. Designated the SCM5B48, the module provides excitation to piezoelectric sensors with built-in microelectronic amplifiers, commonly known as ICP or IEPE sensors.
The SCM5B48 delivers constant current excitation to the sensor, then isolates, filters, and amplifies the sensor output to yield a high-level analog voltage output. The excitation current, signal gain, and filter high-pass and low-pass cutoff frequencies are field-configurable through a set of slide switches.
Six poles of signal filtering result in greater than 100 dB of normal-mode rejection for signal frequencies above the cutoff frequency. To ensure protection of data-acquisition equipment, the SCM5B48's signal inputs and sensor excitation outputs are protected against accidental connection of voltages of up to 240 V rms.
Dataforth, www.dataforth.com.
