eDAQ Digital Input/Output Layer

Somat eDAQ Digital Input/Output Layer

The Somat eDAQ Digital Input/Output Layer (EDIO) is an extremely versatile layer that can measure digital inputs/outputs, pulse counters, quadrature decoders, vehicle bus and GPS. The EDIO offers 24 channels that can be used as digital inputs/outputs with 12 additional channels for wide-range inputs.

Integrated in the digital channels are 18 configurable pulse counters. One layer can also support up to two independent vehicle bus interfaces via the use of Vehicle Bus Smart Modules.

The GPS communications port is designed to work with Somat GPS devices.

Product Specifications


Size: 9.2"W x 9.7"L x 1.3"H (23.4cmW x 25cmL x 3.3cmH)
Weight: 4.4lbs (2.0kg)
Temperature: -20° to 65° C
Connectors: (11) Somat M8 Female Bulkhead Connectors


Digital Inputs/Outputs

Number of Inputs: 24
Voltage Ranges:
Steady State: -0.2 to +45 VDC
Short Term Transients: -0.4 to +100 VDC
Transducer Power: 5V or 12V @1A
Threshold Voltage Accuracy: +/-20mV
Input Switching Threshold Voltages are programmable

Wide Range Digital Inputs

Number of Inputs: 12
Voltage Ranges:
Steady State: -45 to +45 VDC
Short Term Transients: -100 to +100 VDC
Transducer Power: 5V or 12V @1A
Threshold Voltage Accuracy: +/-20mV
Input Switching Threshold Voltages are programmable

Pulse Counters

Number of Inputs: 18
Pulse Counter Modes: Pulse Width Period, Pulse On Period, Pulse Rate and Quadrature Decoder
Pulse Rate & Quadrature: Count Rising Edge Pulses for Inputs to 1MHz. Maximum Pulse Rate is over 4 billion.
Pulse Width Period and Pulse on Period: Measured using s 5MHz clock (200 nSec resolution)
Min Frequency Measurement Possible: .0012 Hz


(9) Somat SAC-TRAN-MP-2 Transducer Cables (2 m)

Product Options

Somat GPS Receiver for the EDIO (EDIO-5HZGPS)

The Somat GPS Receiver (EGPS-5HZ) is a commercial WAAS-enabled GPS receiver with a 5Hz update rate. The receiver continuously tracks and uses up to 12 satellites to compute and update position. Available channels include Latitude, Longitude, Altitude, Speed m/s, Speed MPH, Speed Knots, Heading, Year, Month, Day, Hour, Minute, Second, Nanosecond and Number of Satellites.

Part Number Code
The following number scheme is used to identify the layer configuration.




B = Base Layer
5HZGPS = 5Hz GPS Receiver

Product Literature

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Product Data Sheet & Literature

Somat EDIO

Data Sheets

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Precision in series: This also applies to the accuracy of the values specified in our data sheets. Ideal conditions can often be theoretically attained based on the values given, but our data sheets focus on realistic standard assumptions - such as those likely to be encountered in your application. Therefore, please consider this when comparing our data sheets with those of other manufacturers.

Application Reports on Somat eDAQ

Rugged data acquisition systems for field tests of off-road vehicles

There are different requirements for measurement technology regarding field tests of off-road vehicles. Read here what you should keep in mind.

Data Acquisition on a 7 Second Dragster

Ray Thompson of Thompson Engineering and Racing used the HBM Somat eDAQ-lite to measure the 7 second dragster.

Optimized ski cross performance - with SoMat and nCode GlyphWorks

French Skiing Federation (FFS) optimizes ski cross performance using the whole HBM measurement chain: SoMat for the data acquisition and nCode GlyphWorks for data analysis.

Reliable Data Acquisition Ensures Rail Car Safety

To help keep costs of on-track railroad tests under control, you need a reliable data acquisition system. For a recent series of tests on a new truck trailer design, SPE of Highland, IN chose SoMat eDAQ from HBM.

A "lifestyle" airplane for take-off and landing on the ground, on water and snow

Making flying a pleasure again: This is the aim of the new, ultra-modern AKOYA light airplane. On-board safety and comfort is ensured through the use of strain gauges from HBM and the ultra-rugged SoMat eDAQlite data acquisition...

Volvo Construction Equipment (CE): Making loaders more fuel-efficient with toughest tests - and SoMat eDAQ data acquisition

Volvo Construction Equipment (CE) uses HBM's SoMat eDAQ test system to help it test loader prototypes under extreme conditions.

SoMat eDAQ used in Australian rail operations tests

Trains in the Australian outback have to meet extremely demanding requirements. The renowned Institute for Rail Technology (IRT) decided to use HBM's particularly rugged SoMat eDAQ data acquisition system when designing a new...

HBM’s eDAQ monitors hull for maximum military success

The latest British military fast landing craft demonstrator has been developed and built by QinetiQ using HBM‘s eDAQ data acquisition system as part of the testing and analysis regime. The Partial Air Cushion Supported CATamaran...

Chinese tests highlight superiority of HBM’s eDAQ solutions

Comparative tests of data acquisition equipment for use on high-speed trains undertaken by the Beijing Jiaotong University in China have demonstrated the effectiveness of HBM’s SoMat eDAQ equipment when operating under extremely...

Redefining Rugged: HBM’s SoMat eDAQ Data Acquisition System

Nothing can stop the eDAQ. Elevated shock and vibration levels, even violently spraying hydraulic fluid during testing are no match for this rugged, mobile data acquisition system.

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