SCM5B48 – IEPE / ICP® Sensor Input Module

The SCM5B48 module provides constant current excitation and signal conditioning for piezoelectric sensors with built-in microelectronic amplifiers—commonly known as ICP®, IEPE, or LIVM sensors. It delivers a regulated excitation current to the sensor, then isolates, filters, and amplifies the signal to produce a high-level ±10V analog output.

Field-configurable slide switches allow selection of excitation current (4mA or 9mA), gain (1, 10, or 100), and high-pass/low-pass filter cutoff frequencies.

A six-pole signal filter provides over 100dB of normal-mode rejection above the cutoff frequency. One pole on the field side offers anti-aliasing protection, while a five-pole programmable Bessel filter on the system side ensures excellent time-domain response. A second-order high-pass filter removes low-frequency drift and noise.

To protect valuable DAQ equipment, all signal inputs and sensor excitation outputs are protected to 240Vrms continuous. The module operates from a +5VDC ±5% supply and provides 1500Vrms transformer isolation between input and output.

Key Features

• Interfaces with ICP®, IEPE, and LIVM sensors

• ±10V output range

• 1500Vrms transformer isolation

• ANSI/IEEE C37.90.1 transient protection

• Input protection to 240Vrms continuous

• Programmable gain: 1, 10, 100

• Programmable low-pass filter: 2.5, 5, 10, 20kHz

• Programmable high-pass filter: 0.2Hz or 10Hz

• Programmable excitation current: 4mA or 9mA (24V compliance)

• ±0.2% accuracy, ±0.01% linearity

• Low temperature drift

• Operating range: -40°C to +85°C

• CE compliant, CSA and FM approvals pending

• Mix and match with other SCM5B modules on the same backpanel