The SCM5B48 provides excitation to piezoelectric sensors with built-in microelectronic amplifiers, commonly known as ICP®* or IEPE* or LIVM* sensors. The module provides a constant current excitation to the sensor, 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 cutoff frequencies are field-configurable through a set of slide switches.

Six poles of signal filtering in the SCM5B48 module result in greater than 100dB of normal-mode rejection for signal frequencies above the cutoff frequency. One pole of filtering is on the field side of the isolation barrier for anti-aliasing purposes and the remaining five-pole programmable Bessel filter is located on the system side. High-pass filtering is achieved through a second order passive filter, located on the field side. If desired, the output switch can be turned on continuously by simply connecting pin 22, the Read-Enable pin, to I/O Common, pin 19.

The SCM5B48 offers the option of setting the constant current source for sensor excitation to common values of 4mA or 9mA with a compliance voltage of 24VDC. Programmable gains of 1, 10 and 100 are selectable and the module offers a ±10V output. The required supply level is +5VDC, ±5%.

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 240Vrms.

*ICP is a registered trademark of PCB Group Inc.
*IEPE is Integrated Electronic Piezo-Electric
*LIVM is Low Impedance Voltage Mode
  • Interfaces to ICP®* or IEPE* or LIVM* Sensors
  • ±10V Output Range
  • 1500Vrms Transformer Isolation
  • ANSI/IEEE C37.90.1 Transient Protection
  • Input Protection to 240Vrms Continuous
  • 1, 10, and 100 Programmable Gain
  • 2.5, 5, 10, and 20kHz Programmable LP Filter
  • 0.2 and 10Hz Programmable HP Filter
  • 4mA or 9mA Programmable Current Excitation
  • ±0.2% Accuracy
  • ±0.01% Linearity
  • Low Drift with Ambient Temperature
  • -40°C to +85°C Operating Temperature Range
  • CE Compliant, CSA and FM Approvals Pending
  • Mix and Match Module Types on Backpanel
Accelerometer Input Module

SCM5B48 Devices


Part Number Input RangeOutput RangeBandwidthMechanical FormatIsolation Voltage (Vrms)
±10V max ±10V 2.5kHz to 20kHz Modular plug-in board 1500
±10V ±5V 2.5kHz to 20kHz Modular plug-in board 1500

Frequently Asked Questions


Can Dataforth provide calibration reports for modules I purchased?
Yes we can provide calibration reports for the modules that you purchased.

You can either
a) visit https://www.dataforth.com/TestDataReport.aspx to search for Test Report Datasheets by Serial Number or
b) you can send us a list of model numbers and their serial numbers to support@dataforth.com

Can you explain how to use the DIP switches on SCM5B48 to achieve different settings?
Below are the SCM5B48 configurable parameters and their associated DIP switch designators in the order they appear left to right in the data sheet, Figure 2: SCM5B48 Side Label.

High Pass Filter, S5: DC, 0.2Hz, 10Hz

Switch S5 selects between DC coupling or AC coupling and between 0.2Hz or 10Hz low end of the High Pass filter cutoff frequencies.

Gain, S4: 1, 10, 100

Switch S4 selects from among the Gain settings = 1, 10, or 100. Since the output range is a fixed +/-10V -01 or +/-5V -02, the implication of this is that switch S4 actually selects the input voltage range as in the formula Vin = Vin max / G. Example: in an SCM5B48-01, S4 =10 the input voltage range is Vin = +/-10V / 10 = +/-0.1V.
Keep in mind, for DC coupling Vout = VAC + VDC which is limited to +/-10V total for -01 and +/-5V total for -02.

Excitation, S1: 4mA, 9mA

Switch S1 selects between excitation current sources of 4mA or 9mA +/-10%. They both have a compliance voltage of 24V +/-10%.

Low Pass Filter, S3, S2: 2.5kHz, 5kHz, 10kHz, 20kHz

Switch S3 and S2 select from among the Low Pass filter cutoff frequencies of 2.5kHz, 5kHz, 10kHz, or 20kHz.


Keywords/Phrases: SCM5B48, SCM5B48 DIP switches, SCM5B48 settings


Analog Devices announced a last time buy and discontinuance of their signal conditioning modules. Can I replace them with Dataforth signal conditioning modules?
Yes, in general, Dataforth signal conditioning modules are a direct replacement for all Analog Devices signal conditioning modules. e.g. "SCM5B35-xx: Linearized 4-Wire RTD Input Modules" will replace Analog Devices "5B35: Isolated 4 Wire RTD Input Signal Conditioning Module".

Please note that Dataforth signal conditioning modules are RoHS II compliant.

Does Dataforth offer SCM5B48 modules with customized fixed-parameters?
Please send Dataforth the selections for the four configurable parameters of the SCM5B48.
Below are the parameters in the order they appear left to right in the data sheet, Figure 2: SCM5B48 Side Label.

High Pass Filter, S5: DC, 0.2Hz, 10Hz
Gain, S4: 1, 10, 100
Excitation, S1: 4mA, 9mA
Low Pass Filter, S3, S2: 2.5kHz, 5kHz, 10kHz, 20kHz

Dataforth will assign custom module number, generate a data sheet, and send it for review and signoff.

Keywords/Phrases: SCM5B48 fixed-parameter, SCM5B48 preset-parameter, fixed-parameter, preset-parameter

Can I get the required 5VDC from the USB connector of my notebook to power my SCM5B48?
The SCM5B48 could require up to 165mA max from the 5VDC power source.
Check your notebook's user manual for the current available from the USB connector or contact the notebook manufacturer and ask them for details.

Is the SCMXPRT-003 DIN rail mountable?
The SCMXPRT-001 has an option for DIN rail mounting (part number: SCMXPRT-001D) but the SCMXPRT-003 does not. Instead, it can be mounted on the SCMXRK-002 which is a 19 inch metal rack for mounting the SCMXPRT-003 as well as various Dataforth backpanels and the SCMXIF interface board.

If the input range of my signal conditioner is -1V to +1V and the output range is 0 to 10V, does this mean that it ignores polarity?
A signal conditioner with these I/O ranges does not mean that the module ignores the polarity of your voltage input. The output of voltage input modules are scaled linearly, meaning an input of -1V would correspond to an output of 0V, an input of 0V would correspond to an output of 5V, an input of +1V would correspond to an output of 10V, and so on.

What is the recommended power supply for Dataforth SCM5B and 8B modules?
The recommended power supply for the Dataforth SCM5B and 8B modules are the linear power supplies in our SCMXPRT/SCMXPRE series. The SCMXPRT/SCMXPRE power supplies output 5V and have options for 1A output current (SCMXPRT-001) or 3A output current (SCMXPRT-003).

The SCMXPRE series is identical to its SCMXPRT counterpart, but is configured for European voltage standards.

The SCMXPRT-001/SCMXPRE-001 both have the option for DIN rail mounting as well (SCMXPRT-001D/SCMXPRE-001D).

Other power supplies that meet that power requirements of the SCM5B and 8B modules can be used as well, but it is strongly recommended to use a linear power supply rather than a switch-mode power supply. Switching power supplies can add noise artifacts to the output of your modules.

How does the load resistance of a module affect the noise at the output?
Noise at the output of a module is independent of load resistance.

How do I convert an RMS voltage to its corresponding peak voltage?
To convert an RMS voltage to its corresponding peak voltage, you simply take the RMS voltage value and multiply it by the square root of 2, or roughly 1.414.

For example, 1500Vrms corresponds to a peak voltage of 1500 * 1.414 = 2121 Vp

Will the isolation on the SCM5B modules support a discharge of 1500VDC without damaging anything connected to the output?
Yes, the SCM5B modules are isolated up to 1500 Vrms, which means that if the common mode voltage between the field side and system side is limited to 1500Vrms, the device will be protected.

However, the input protection for SCM5B modules (i.e., the voltage across the +IN and -IN input terminals) is 240Vrms max.