MW100 Data Acquisition Unit

The MW100 is a scalable, high performance data acquisition/data-logging platform designed for both PC-controlled and stand-alone operation under harsh operating conditions.

"Smart Logging" - Anytime, Anyplace

The MW100 is a scalable, high performance data acquisition/data-logging platform designed for both PC-controlled and stand-alone operation under harsh operating conditions. Open Ethernet connectivity with web-based configuration and data monitoring functions allow MW100 to handle a wide range of monitoring and historical logging functions. See real time trends with your web browser from any PC and no special software. A full range of input/output modules handle all of your process inputs with fast measurement speed and high noise immunity for rock-solid performance.

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Anytime, Anyplace...
  • In a wide range of temperatures: -20 to 60° 1,2,3,4
  • Reinforced insulation: Between input terminal and case5
  • 3700 Vrms (one minute) or 600 Vrms/VDC (continuous)
  • A wide variety of network functions: HTTP, FTP, DHCP, SNTP, E-mail, and others
  • DC power supply (12 V-28 V) option available
Smart Logging...
  • High speed measurement with a single unit (10 channels/10 ms or 60 channels/100 ms):
  • Shortest measurement interval of 10 ms
  • Multi-interval: Enables mixing of three different measurement intervals in a single unit
  • (measurement intervals can be set for each module)
  • Supports CompactFlash (CF) cards6 of up to 2 GB
  • Continuous data acquisition is possible on 60 channels at 100 ms for approximately ten days with a 2-GB card, or for three months on 60 channels at 1 s.
  • MATH function on the main module available with the /M1 option.
  • Collective data acquisition on 360 channels (via Modbus with the /M1 option)
  1. The operating temperature range for the input modules and main module. The operating temperature range of the output modules is -20 to 50°.
  2. Note that the power cord supplied with the main module differs depending on the operating temperature range (see the specifications on page 7). If the operating temperature range specification of the supplied standard power cord does not meet your requirements, we recommend that you select a screw-type terminal rather than the plug type for the main module power inlet, and supply your own power input cable.
  3. The operating temperature range of the AC adapter used with DC power supplies is 0 to 40°.
  4. Please consult with a representative for applications involving temperatures below -20°.
  5. The withstand voltage value with the MX110 input module. For the withstand voltage values of other input and output modules, please refer to the specifications for those modules (GS 04M10B01-01E).
  6. CF card not included (sold separately).

System Configuration

Standard Configuration

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A custom MW100 measuring system is comprised of three elements; the MW100 main module, MX Series input/output modules, and MX150 Series base plate. The system can be bench mounted as-is or DIN rail mounted for rack or panel installations. A DIN rail-mounting bracket is included with the MX150.

The input/output modules, base plate, and accessories are all the same as those for the MX100 DAQMASTER series (AC adapter is for the MW100 only).

Input Modules

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Name Model                    
Number of Channels Shortest Measurement Interval Description
10 channel pulse input module MX114-PLS-M10 10 100 ms
Non-voltage contact /Open collector(10,000 sample/sec integration speed)
30 ch general purpose input module 500 ms scan speed  MX110-VTDL30 30
500 ms
Clamp terminal, DCV/TC/DI
MX110-VTDL30/H3 30 500 ms
M3 screw terminal, DCV/TC/DI

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Number of Channels

Shortest Measurement Interval


Universal Input Modules



10 ms

DC voltage, thermocouple, 3-wire RTD, DI (non-voltage contact, Level (5 V logic). Mixed input allowed.



100 ms

DC voltage, thermocouple, 3-wire RTD, DI (non-voltage contact, Level (5 V logic). Mixed input allowed.

4 Wire RTD and Resistance Input Module



100 ms

DC voltage, 4-wire RTD, 4-wire resistance, DI (non-voltage contact, Level (5 V logic). Mixed input allowed.

Strain Input Modules



100 ms

Built-in bridge resistance of 120 ohm


Built-in bridge resistance of 350 ohm


For connection with an external bridge head and strain gauge type sensor (NDIS connector).

5 V Digital Input Module



10 ms

Non-voltage contact, open collector, and Level (5 V logic). Mixed input allowed.

24 V Digital Input Module



10 ms

Level (24 V logic), Vth = 12 V

Output Modules

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Name Model                
Number of Channels Output Update Interval Description
Analog Output Module MX120-VAO-M08 8 100 ms Allows mixed voltage (±10 V) and current (4-20 mA) output
PWM Output Module MX120-PWM-M08 8 100 ms Pulse width modulation output module
Digital Output Module MX125-MkC-M10 10 100 ms “A” contact (SPST)

Base Plate

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Base plates available for all configurations, from 1 to 6 input/output modules.

When used for the MW100/MX100, you must replace the attachment with the one that comes standard with the MW100/MX100.







N Mw100 08 Connector Covers
Connector covers for open slots

AC Adapter (772075)
AC adapter for the DC power model.
Operating temperature range: 0 to 40°
*Only for the MW100

Accessories (Removable Terminal)

N Mw100 10 All input/output terminals are removable except for those of the MX112-NDI-M04. If multiple terminals are prepared ahead of time, no re-wiring is needed between measurements.

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Model Description
772061 Screw (M4) terminal block (RJC (reference junction compensation) included).
For use in combination with 772062. Compatible with MX110-UNV-M10, MX115-D05-H10, and MX115-D24-H10.
772062 Connection cable between input modules and the screw terminal block.
Compatible with MX110-UNV-M10, MX115-D05-H10, and MX115-D24-H10.
772063 Plate with clamp terminals (RJC included).
Compatible with MX110-UNV-M10, MX115-D05-H10, and MX115-D24-H10.
772064 Clamp terminals. Compatible with MX110-UNV-H04.
772065 Clamp terminals. Compatible with MX120-VAO-M08, MX120-PWM-M08, and MX125-MKC-M10.
772067 Plate with clamp terminals. Compatible with MX110-V4R-M06.
772068 Plate with clamp terminals (Built-in bridge resistance of 120 ohm). Compatible with MX112-Bxx-M04.
772069 Plate with clamp terminals (Built-in bridge resistance of 350 ohm). Compatible with MX112-Bxx-M04.
772080 Plate with screw (M3) terminal (RJC included).
Compatible with MX110-UNV-M10, MX115-D05-H10, and MX115-D24-H10.
772081 Plate with clamp terminal for current with 10 ohm built in bridge resistance, applies to MX110-UNV-M10
772082 Plate with clamp terminal for current with 100 ohm built in bridge resistance, applies to MX110-UNV-M10
772083 Plate with clamp terminal for current with 250 ohm built in bridge resistance, applies to MX110-UNV-M10

Advanced Data Logging

The MW100 can be connected to multiple PCs at the same time. This allows monitoring and sharing of measured data by multiple users. A login function is included to enable assigning of access rights.

Measurement Information Shared
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Measured Data Shared
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* Mail Server Required

Acquire up to 360 Channels in One System

N Mw100 14 A large data acquisition system of up to 360 channels can be assembled using multiple MW100s and standard MODBUS TCP Ethernet communications. When equipped with the /M1 math option, the MW100 can acquire up to 300 channels of external data from additional MW100 units or other devices such as a PLC using MODBUS TCP communications. This provides a total system capacity of 360 channels (60 built-in measure channels + 300 external).


Serial MODBUS RTU communications (RS- 232 or RS-422A/485) can be ordered as a separate option with the same capability. 

Connect to Other Devices

N Mw100 15 An optional serial MODBUS RTU interface provides data exchange functions with other devices such as recorders, PLCs and controllers. In this mode, MW100 can serve as expansion I/O or as a data acquisition terminal for another connected device.

Remote Data Acquisition

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Screen updating may be slower depending on the communication environment.
When the measurement location is located remotely from the data monitoring station, a dial up phone connection can be used for communications. All MW100 web browser-based data monitoring and FTP functions can be used via this connection for remote data acquisition applications.

Time Synchronization

N Mw100 17 The MW100 can synchronize its clock to a network time-server using SNTP (Simple Network Time Protocol), allowing any number of MW100s in a system to have precisely matched time.

Both SNTP Server and Client modes are supported. In Server mode, one MW100 can acquire time data from a server using Client mode. It can then serve time data in Server mode to other MW100s that function as Clients.

Clock synchronization functions are allowed only when the measurement interval within the unit is two seconds or longer.




Main Unit Recording Function


Select a CF card appropriate for the required data recording time. See the table below for the approximate time's worth of data that can be recorded for each size of card. For example, when recording ten channels of data at a 10 ms measurement interval, the approximate amount of data that can be recorded to a 128-MB CF card is 8.8 hours worth. On the MW100, measured data is recorded to the CF card via an SRAM. The SRAM is backed up with a battery (for approximately ten years), ensuring that even in the event of a power failure, data prior to the failure is not lost.

Recording Channels Measurement Interval 128 M 512 M 1 G
10 ch 10 ms1 Approx. 8.8 hours Approx. 1.4 days
Approx. 2.8 days
100 ms Approx. 3.7 days
Approx. 14.8 days
Approx. 28.9 days
500 ms Approx. 18.5 days Approx. 74.0 days
Approx. 144 days
1 s Approx. 37.0 days
Approx. 148 days
Approx. 289 days 
2 s Approx. 74.0 days
Approx. 296 days
Approx. 578 days
(Approx. 1.5 years) 
5 s Approx. 185 days
Approx. 740 days
Approx. 1446 days
(Approx. 3.9 years) 
20 ch 50 ms2
Approx. 22.2 hours
Approx. 3.7 days
Approx. 7.2 days
100 ms Approx. 1.8 days Approx. 7.4 days
Approx. 14.4 days
500 ms Approx. 9.2 days Approx. 37.0 days
Approx. 72.3 days
1 s Approx. 18.5 days Approx. 74.0 days
Approx. 144 days
2 s Approx. 37.0 days
Approx. 148 days
Approx. 289 days
5 s Approx. 92.5 days
Approx. 370 days
(Approx. 1 year)
Approx. 723 days
(Approx. 1.9 years)
60 ch 100 ms
Approx. 14.8 hours
Approx. 2.4 days
Approx. 4.8 days
500 ms Approx. 3.0 days
Approx. 12.3 days
Approx. 24.1 days
1 s Approx. 6.1 days
Approx. 24.6 days
Approx. 48.2 days
2 s Approx. 12.3 days
Approx. 49.3 days
Approx. 96.4 days
5 s Approx. 30.8 days
Approx. 123 days
Approx. 241 days
Storage capacity in terms of time by CF card size and numbers of channels
  1. At a measurement interval of 10 ms, the maximum number of channels that can be measured is 10. Eleven or more channels cannot be measured at a measurement interval of 10 ms.
  2. At a measurement interval of 50 ms, the maximum number of channels that can be measured is 30. Thirty-one or more channels cannot be measured at a measurement interval of 50 ms.


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The MW100 enables mixing of three different measurement intervals in a single unit. Measurement intervals can be set for each individual module. This allows you to measure various items under test at the most appropriate measurement intervals. Also, you can set data recording conditions1 for each measurement interval, thereby using the available space on the CF card as efficiently as possible.

  1. Single: Save a file up to the specified size then stop recording.
  2. Full Stop: Stop recording once the CF card is full. Rotate: When the capacity of the CF card has been exceeded, the oldest files are deleted to free up space, then recording continues.

Trigger and Data Thinning Functions

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Data Recording Using the Trigger and Data Thinning Functions                              

The MW100 is equipped with built-in trigger functions. Data recording can be started based on alarm values, time, external contact input, or other parameters. Once recording is started, it can be set to progress continuously or according to a specified data length. When specifying a data length, a pre-trigger can also be set. The MW100 also provides a data thinning function.

Portions of measured data can be omitted at regular intervals during measurement (minimum of four seconds) before data is recorded. Using the trigger and data thinning functions together provides "coarse" recording of general data and "fine" recording of abnormal data.

Broken Line Chart Output (/M1 Option)

N Mw100 22 This function is included with the MATH (/M1) option. Patterns can be output from the analog output and PWM output modules (MX120) by inputting the coordinates of the pattern you wish to generate. In the pattern output shown in the figure below, points (X1,Y1) through (X10,Y10) are input in advance, and the output is generated accordingly.

New Functions for Style S3

Reporting Functions

Creates hourly, daily, weekly, and monthly reports synchronized to measurement start and stop. On mesurement stop action, a report file is saved to the MW100 CF media. A report status display is provided in the web browser monitor mode. Report data is saved to a text (.txt) file compatible with common software applications.

Up to 60 report channels reporting data from assigned measure or math channels
Report channel data: MIN, MAX, average, summation, and instantaneous values
Report channel data: tabular digital data display and graph for totalizer data
File format: .txt text file (tab delimited)
Report math interval:  up to 100 ms
Email messaging:  An email message is sent at the report creation time
File transfer:  the report file can be transferred to an FTP server at the report creation time

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Report logging display
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Graph Display of totalizer data
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Use Excel or other applications to create custom reports from the report text file.

MW100 Automatic Assignment Function (/MC1 Option for the DXAdvanced DX2000)

The DX2000 can use MW100 system hardware as additional external input channels. They can automatically recognize MW100s on a network and perform automatic assignment of the MW100 input channels to build a large multi-point data acquisition system quickly and easily with no PC requirement. System requirements: /MC1 external input option and /M1 math option. See the product bulletins and general specifications for details.

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*The firmware version of R2.22 or later is required for the MW100 to support the automatic assignment function.

Firmware R3.03 Functions

Line Monitor: Enables monitoring with a digital display, even in environments with low transmission speeds.
Setting List: A list of settings that can be displayed in TXT (text) or "printable" format.
Bit output computation: Enables output of the value of specified bits (0/1) of reference channel data (positive integers expressed as bits). 
Alarm Do output: Preset settings of Off, Open, and Close were added as operations upon stop or error.
Modbus Slave/Server Function:
  • Added a coil function for mapping data on communication input channels (C001 to C300).
  • Added input relays for measurement channels, computation channels, and the main unit operating status.
  • Added input registers for mapping main unit mode information.
Summer Time Setting: The starting and ending date/time for Summer time can be set.

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Firmware R3.02 Functions

Standard Support for the EtherNet/IP Protocol

Advantages of EtherNet/IP Compatibility

  1. Able to develop a highly flexible systems
  2. By using Ethernet/IP in the standard interface, the most appropriate multivendor systems can be readily developed for users. In addition, instruments can be added or modified without any additional programming, thus improving efficiency.
  3. Improved trend analysis
    By making it easier to install the MW100 Data Acquisition Unit in systems and thereby facilitating the chronological monitoring of equipment operating conditions and quality data, trends can be analyzed with higher precision.
  4. Transmission of vast amounts of data at high speeds over a wide area
    Data can be regularly transmitted at high speeds to instruments distributed over a wide area.
  5. Easy maintenance over a network
    With Ethernet, maintenance staff do not need to learn a dedicated protocol for each instrument, making it easier to control the network.

    1. Note 1: You must install firmware R3.02 to use EtherNet/IP with the MW100.

      Note 2: EtherNet/IP is an open industrial application layer protocol supported by ODVA (Open DeviceNet Vendor Association).

    Addition of User Authorization to the SMTP Authorization Function

    A user authorization feature has been added to the SMTP Authorization function. SMTP authorization (SMTP Service Extension Authentication: SMTP AUTH) means that verification is made when sending e-mails so that only successfully authorized users can send e-mail. This newly added authorization function serves to further strengthen security for sending of e-mails.
    The AC Power Input in all Yokogawa instruments is designed as a 3-pin connection (one of which is a GND pin). In some parts of the world, PCs are sold with AC power cables that are 2-pin. Often times this means the ...
    High Resolution mode can be used to remove high frequency noise and increase vertical resolution. It achieves this by increasing the number of effective bits per data to 12-bits through digital and bandwidth filters.

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