Data Acquisition (DAQ) and Control from Microstar Laboratories

SCS: Signal Conditioning System

data acquisition filtering data acquisition software channel architecture enclosures services

Optimize signal quality from any sensor

four signal-conditioning modules
SCS-32 package with iDSC 1816 –
32 channels of conditioned anti-aliased data
(click for 130kB close-up)

The SCS Sensor Signal-Conditioning System complements the iDSC 1816 anti-aliasing board to provide a continuous path in a single package: starting with raw measurements at the sensor and ending with conditioned anti-aliased data logged to disk on a PC.

An SCS package provides direct connection to sensors, and offers many signal-conditioning services in a single convenient, powerful package. These include

  • current sensor excitation: 4 mA at up to 28 Volts
  • voltage sensor excitation: 1, 2, 5, and 10 Volts at up to 70 mA
  • quarter-, half-, and full-bridge resistor networks
  • 120 and 350 ohm resistors as standard options
  • any value resistor networks, sensor by sensor
  • 10 full-scale options: 10 mV, 20 mV, 50 mV, 100 mV, 200 mV, 500 mV, and 1, 2, 5, and 10 Volts
  • available offset ranges from between +/-0.5V to +/-5V, depending on the input option range used
  • programmable gain with auto-calibration
  • programmable AC/DC coupling for ICP sensors
  • two high-resolution acquisition-synchronized timing channels per iDSC 1816

8-channel SCS-08 signal conditioning system
Signal Conditioning by Channel Count

SCS-08 (shown here)
SCS-32 (shown above with iDSC 1816)

Each package consists of an enclosure and 1, 2, 3, or 4 MSSC-8 modules, for a total of 8, 16, 24, or 32 channels.

A basic SCS, part number SCS-08, offers 8 channels of conditioned data, matching the 8 acquisition channels provided on each iDSC 1816 board. (Every iDSC 1816 also includes two high-resolution acquisition-synchronized timing inputs, running at 128 times the maximum acquisition rate.) An SCS-08 package consists of an industrial enclosure and one MSSC-8 signal-conditioning module. A single enclosure is sufficient for 8, 16, 24, or 32 channels, so SCS packages are available in each of those options. The SCS-32 package can be a part of an even larger system, for higher channel counts.

Each SCS-08 package requires an MSCBL 048-01 cable to send conditioned signals to an iDSC 1816 anti-aliasing data acquisition board in a PC. It includes a cable to carry power from the PC.

Scalable for High-Channel-Count Applications

An MSCBL 048 cable connects the SCS package to an 8-channel iDSC 1816 data acquisition board that has built-in anti-aliasing filters. This combination scales up in two dimensions. First, a single PC may contain up to four iDSC 1816 boards -- each connected to an MSSC-8 -- for a total of 32 channels of conditioned anti-aliased data acquired at the maximum rate of 153.6k samples per second per channel.¹ Second, DAPcell network software, with at-the-server disk logging, supports multiple instances of these 32-channel modules controlled from a single DAPcell client.

four signal-conditioning modules
4 SCS-32 packages, with 16 iDSC 1816 boards in industrial PCs –
128 channels of conditioned anti-aliased data

The SCS brings with it the potential for hundreds of channels of simultaneously-sampled, conditioned, anti-aliased data logged to disk at up to 153.6k samples per second per channel.

A single PC can support up to fourteen iDSC 1816 boards. At these high channel counts, signal-conditioning power requirements likely will exceed 12-volt power normally available from the PC. In any case where this may happen, Microstar Laboratories can make special arrangements to boost the power provided by the PC.

Commercially available off-the-shelf PCs and associated disk controllers and drives have enough electrical power and enough computing power to form a balanced total system with four iDSC 1816 boards and an SCS-32. A total system like this can continuously log to disk all 32 channels of conditioned anti-aliased data at the full data acquisition rate of 153.6k samples per second -- an overall rate of just under 5 million samples per second.

An MSXB 045 board in each of two or more networked PCs, that each contain one or more iDSC 1816 boards, allows the whole networked system to work as a single synchronized system with possibly hundreds of conditioned channels.

Suggested shopping lists for synchronized systems requiring signal conditioning and anti-aliasing

Contact Microstar Laboratories or your local distributor for pricing and to place an order.

Check out the details of the MSSC-8 signal conditioning module that forms the core of the SCS package.

¹ A single PC may contain more than four iDSC 1816 boards, but then may not log to disk at the full data acquisition rate. Four MSSC-8 modules exactly fit in a single full-size industrial enclosure.