Legacy 21.5" High Resolution Touchscreen Monitor, 1 USB Port, 1 HDMI Port
This is a Legacy product and is no longer available for purchase. Please review the information on this page and call (425)-745-3229 or email [email protected] if you have further questions.
The cMT-IM21 was a 21.5″ Display only device that could be paired with our cMT-SVR Headless units. To achieve the same functionality and similar panel cutout, you’ll need the cMT-FHDX-820 paired with our MON1021APv2.

Need help planning the upgrade? Tell us how this product is used in your system and we will work out the right path forward, and what stays the same in your existing project.
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Legacy 21.5" High Resolution Touchscreen Monitor, 1 USB Port, 1 HDMI Port cMT-iM21 Price Not Available (N/A)
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High Performance Headless HMI with HDMI output cMT-FHDX-820 $709
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FREE User Friendly HMI Software
Download our free, full-featured HMI configuration software to create custom control applications for your industrial process. EBPro supports over 300 PLC & controller protocols, ensuring seamless integration with new or existing systems. No license or key required.

What is EBPro?
EBPro a is a powerful HMI software package that gives you the flexibility to create and deploy custom control applications for your unique industrial process. Design the screens you want quickly – pick and place graphical objects and assign communication (PLC) drivers easily. With support of over 300 communication protocols including Allen-Bradley, Siemens, Omron, Emerson, GE, Panasonic, Mitsubishi, and many more, Maple Systems products can seamlessly integrate into your existing system. Visit our Support Center for a list of PLCs we integrate with.Software Downloads & Upgrades
Manuals & Guides
Videos
- Quick Start: Part 1 – Introduction and Installation
- Quick Start: Part 2 – Create a Project
- Quick Start: Part 3 – Creating Windows
- Quick Start: Part 4 – Creating Static Elements
- Quick Start: Part 5 – Creating Digital Objects
- Quick Start: Part 6 – Create and Group Analog Objects
- Quick Start: Part 7 – Simulation Mode
Sample Projects
Controller Information Sheets
Communication Cables
What is cMT?
cMT solutions are IIoT-ready HMIs that enable easy monitoring of your industrial plant from a remote device. Install the free cMT Viewer software to enable control and monitoring on any Windows® PC, Apple/Android phone or tablet.
The cMT Series have a Quad-Core CPU which allows 2 cores to run a CODESYS application for soft PLC functionality, and the other 2 cores to run your HMI application.
The cMT Series offers many different models with including HMIs without built-in screens to maximize your options when selecting the correct HMI for your system. cMT HMIs all come with built-in server functionality that allows your remote device running the cMT Viewer application to view and control screens from anywhere on your local network.
The cMT Viewer application is available from the software section of our website for the Windows® PC version, from the Apple App Store for iOS devices, and the Google Play Store for Android devices. This means that organizations can implement a flexible combination of cMT products with different display devices according to their unique application and user needs.
cMT HMIs can be broken into several different categories – DIN rail mounted cMT Servers with no built-in touchscreen that can be hidden away in control cabinets, and panel-mounted touchscreen cMT HMIs that offer the standard stationary HMI interface that operators are used to. We also have cMT Web HMIs for plug and play ease, and cMT Display only units when an extra screen is necessary.
Both Server and Touchscreen models support external connection via cMT Viewer – up to ten different display devices can be connected to each single cMT HMI at one time. All models also support common IIoT features such as MQTT cloud support, OPC UA for SCADA and ERP support, SQL database integration, and secure remote access via EasyAccess 2.0.
Learn more about these IIoT features in the IIoT section of our website. In addition to cMT HMIs, Maple Systems also offers cMT Communication Gateways for applications where standard HMI display functionality isn’t required, but the data extraction features are. cMT Gateways offer all the same communications drivers and IIoT features that cMT HMIs do, which allows them to be used to modernize legacy equipment.

Software Downloads & Upgrades
Manuals & Guides
- cMT Microsoft SQL Quick Start Guide
- cMT MySQL Quick Start Guide
- cMT Quick Start Guide
- EasyAccess 2.0 Manual
- EBPro Programming Manual
- EBPro Quick Start Guide
- MQTT User Manual
- OPC-UA Set-up Overview
Tech Notes
- Activate a OPC-UA license on a cMT-SVR
- MQTT Set-up
- Using Ignition MQTT Engine with Maple Systems HMIs
Videos
Controller Information Sheets
Communication Cables
What is EasyAccess 2.0?
EasyAccess 2.0 offers the ability to remotely monitor and control a Maple Systems HMI and connected PLC from literally anywhere in the world.EasyAccess 2.0 integrates perfectly with a wide variety of displays including desktop PCs, laptops, tablets, and smart phones, making it easier than ever to connect to operational equipment in the field. What if you could instantly access display information from a plant floor HMI or PLC from the comfort of your office, your living room, or even thousands of miles from the factory?
With EasyAccess 2.0, all of this and more is possible. A remote supporting service, EasyAccess 2.0 offers the ability to easily monitor and troubleshoot Maple Systems HMIs (and connected PLCs) from a remote location as long as an Internet connection is available. Similar to instant messaging software such as Skype, Facebook Messenger, or WhatsApp, EasyAccess 2.0 allows you to instantly communicate with your HMI without spending time memorizing the HMI’s IP address, or configuring complicated port mapping.
As its name implies, EasyAccess 2.0 makes remote monitoring and troubleshooting Maple Systems HMIs efficient and easy.

Software Downloads & Upgrades
Manuals & Guides
Videos
Controller Information Sheets
Communication Cables
Why would I use a headless HMI unit instead of a touchscreen HMI?
Most HMIs have a built-in touchscreen to provide feedback and allow input from on-site personnel. If that is all that’s required, a standard HMI may be sufficient. On the other hand, if you have limited panel space, no need for a touch screen, and want the convenience of monitoring and accessing your system without having to walk to where the HMI is physically located, one of our headless HMIs would be a great option. Utilize your Apple or Android smart phone or tablet to access unit remotely.Software Downloads & Upgrades
Manuals & Guides
- EasyAccess 2.0 Manual
- EBPro Programming Manual
- EBPro Quick Start Guide
- MQTT User Manual
- EasyWeb 2.0 Operations Manual
- cMT-SVR-2XX Installation Guide
- cMT-SVRX Installation Guide
Tech Notes
Videos
Controller Information Sheets
Communication Cables
Can I use a headless HMI without a display?
Yes, our headless (without an integrated display) units are fully functional HMIs. Utilizing EBPro software, you can configure the headless device to communicate with your PLC/controller the same way you would program any Maple Systems HMI. If a display is required, a Windows® PC, Apple or Android smart device, or one of our cMT iV Series Displays or Web HMI’s can be used. The CMT-FHDX devices can be paired with any HDMI supported Monitor or large screen TV, as well as your Windows PC.
Software Downloads & Upgrades
Manuals & Guides
Videos
Controller Information Sheets
Communication Cables
Converting your Legacy Product to a Newer HMI
To convert a Standard/Advanced project to a cMT Series project, open the System Parameters and click on the Model tab. Select the cMT Series model you want to use and click OK to close the System Parameters window. If the screen resolution of the selected cMT Series is different than the original Basic/Advanced HMI, the “Resize Pop-up Windows/Objects” dialog will pop up. It is recommended that all the check boxes are selected and then click OK.

When converting a Standard or Advanced HMI project to a cMT Series project, there are some possible issues you may need to contend with due to the differences between the Advanced/Basic HMIs and the cMT Series HMIs.
Note: It is not possible to convert a cMT Series project to a Standard/Advanced Series project.
Here is a short video showing how easy it is to convert an HMI to a cMT device.
More information and troubleshooting tips:
Basic Security vs. Enhanced Security
Only Enhanced Security can be selected when creating a new cMT Series project. However, if using Basic Security in the Standard/Advanced project, the converted project will retain the
Basic Security settings. Nevertheless, if you will be using cMT-Viewer, it is recommended that you switch to Enhanced Security for the reasons outlined in the next paragraph.
When using Enhanced Security, only PLW registers can be used for the Control Address. Since the cMT Series have a built-in cMT Server, a cMT Viewer can connect to a cMT Series HMI and run the project locally. PLW (Private Local Word) registers are used locally in the cMT Viewer to allow a user to log in and out of the HMI without affecting the actual physical HMI. This way, one user can be logged in locally to the HMI while a different user can be logged in independently using cMT-Viewer.
Stacked Objects
In a cMT Series project, you cannot stack objects one on top of the other and trigger them all by pressing the top button. Only the top button will activate.
In most cases, the Combo Button can be used to recreate the functionality of the stacked objects. For example, if several Toggle Switches are stacked one on top of the other to
simultaneously turn on multiple bits with the push of a button, the Combo Button can be configured to turn on multiple bits with a single press of the button.
Under the Tools menu in EBPro, there is a tool to “Find Overlapping Objects.” Right next to it is an option to “Convert to Combo Button.” This can be used to automatically convert stacked objects to a single Combo Button.
System Keypad
cMT Series HMIs have a built-in System keypad that can be used to enter numbers in a Numeric Object and ASCII characters in an ASCII Object instead of the Custom keypads on Windows 50 – 65.
The Custom keypads for the Basic/Advanced Series will not work in a cMT Series project because of the issue with stacked objects described above. The Custom keypads on Windows 50 – 65 for the cMT Series have been modified so they do not have stacked objects.
Therefore, it is recommended that any Numeric or ASCII objects in the converted project be
modified so they use the System keypad.

Another option is to copy the keypads on Windows 50-65 from a cMT Series project of the same model into the converted project. Then the “Custom keypad” option can be used.
Capacitive Touchscreen
Since the cMT-Series HMIs have
capacitive touchscreens instead of resistive touchscreens, some objects like
the Trend Display work differently in a cMT Series project. For example, in a
Standard/Advanced Series project, the Trend Display has a scroll bar at the bottom
that can be used to scroll back and forth on the X-axis. In a cMT Series
project, there is no scroll bar. Instead, you can simply swipe your finger left
and right on the Trend Display to move back and forth on the X-axis.
Data Sampling with cMT Series
Data sampling is implemented a little differently in the cMT Series. Here is a brief description of how it works. For more information, refer to “Chapter 8 – Data Sampling” in the “EBPro-Programming Manual”:
History file Disabled
With History file disabled, data is stored in HMI RAM memory. When 10,000 records are reached, the oldest 1000 are deleted from the HMI memory, with 9000 remaining. When 10,000 records are reached again, the next 1000 oldest record are deleted from HMI memory, so that at any one time the number of records in memory and being displayed on a Trend Display is between 9000 and 10,000 data points.
If the HMI is rebooted, data is erased and starts recording new data.
History file Enabled (All records in one file)
Save to HMI memory (10,000 limited)
With History file enabled, data is stored in a data log file in HMI memory. When 10,000 records are reached, the oldest 1000 are deleted from the HMI memory. When 10,000 records are reached again, the next 1000 oldest record are again deleted such that the
number of records will always range from 9000 to 10,000.
Control Register:
1 (Clear): Clears the data in HMI memory
2 (Sync): N/A
3 (Sync and Clear): Clears the data in HMI memory
Save to HMI memory (until space full)
Data is saved in the data log file (cMT_log000.db) in HMI memory until the memory is full.
Note: When converting the cMT_log000.db file to XLSX, Excel creates a new tab
at 60,000 records.
Save to USB disk or SD card
Creates a *.db file on USB disk initially but it is empty. After 10,000 samples, the data is written to the USB disk. The Trend Display continues to show all the data, as does the History Data Display. Every 1000 samples, the data log is updated with the most recent 1000 records.
If “Auto sync. Periodically” is selected, the data is automatically backed up to the USB disk or SD card each designated time period.
Control Register:
1 (Clear): Clears the data in HMI RAM memory
2 (Sync): Copies data from HMI RAM memory to USB flash drive
3 (Sync and Clear): Copies data from HMI RAM memory to USB flash drive, then clears data in HMI RAM memory
If data has already been sync’d to USB flash drive, that data will still appear in the Trend Display. Subsequently, there will be a hole where the data was deleted from HMI memory
if it didn’t get sync’d to USB.
History file Enabled (Customized file handling)
Save to HMI memory (until space full)
Data is stored in a data log file in HMI memory. When 10,000 records are reached, the oldest 1000 are stored in the designated data log folder in a separate file. When a new file is created according to the customized file handling settings, all the data for the previous session is stored in the data file in the data log folder and a new data log file is
created in HMI memory for the new session.
Data is saved in HMI memory until the memory is full. The Preservation limit applies according to the number of files selected.
Writing a 1 to the Control Register clears the data log in the temporary HMI memory but not the data files in the data log folder. The data log files in the data log folder can be cleared in the System Settings window History tab.
Save to USB disk or SD card
Every time a new file is created, the Trend Display and History Data Display refresh and only display the data from the new data file.
History
Data Display (Clear, Sync; how does it work with backing up data files)
“Clear” clears the data from the current datalog file in HMI memory or external memory (USB/SD card). Older datalog files are not affected.
Preservation Limit
Number of days selected plus the partial current day. At midnight, the oldest day is deleted as the new day starts.
Option List
With the cMT Series, the Option List is not used to select history files for a Trend Display or History Data Display. Rather, an Option Button (“gear” icon) can be enabled in the Display Object Properties, which allows you to select the date for the history file you want to view.
Event/Alarm Logging with cMT Series
Event/Alarm logging is implemented a little differently in the cMT Series. Here is a brief description of how it works. For more information, refer to “Chapter 7 – Event Log” in the
“EBPro-Programming Manual”:
History files Disabled
With History file disabled, events are stored in HMI RAM memory. When 10,000 events are reached, the oldest 1000 are deleted from the HMI memory, with 9000 remaining. When 10,000 events are reached again, the next 1000 oldest events are deleted from HMI memory, so that at any one time the number of events in memory and being displayed on an Event Display is between 9000 and 10,000 events.
If the HMI is rebooted, all events are erased and the HMI starts recording new events.
History files Enabled
Save to HMI memory (10,000 limited)
With History file enabled, events are stored in an event log file in HMI memory. When 10,000 events are reached, the oldest 1000 are deleted from the HMI memory. When 10,000 events are reached again, the next 1000 oldest events are again deleted such that the number of
events will always range from 9000 to 10,000.
Save to HMI memory (until space full)
Events are saved in the event log file in HMI memory until the memory is full.
Save to USB disk or SD card
Events are initially stored in HMI RAM memory. Creates a *.db file on USB disk/SD card initially but it is empty. When 10,000 events are reached, the first 10,000 are written to the USB disk or SD card. Subsequently, with each additional 1000 events, the events are
written/appended to the event log file on the USB disk or SD card.
If “Auto sync. Periodically” is selected, the events are automatically backed up to the USB disk or SD card each designated time period.
Option List
With the cMT Series, the Option List is not used to select history files for an Alarm Display or Event Display. Rather, an Option Button (“gear” icon) can be enabled in the Display Object Properties, which allows you to select the date for the history file you want to view.
Software Downloads & Upgrades
Manuals & Guides
Videos
Sample Projects
Controller Information Sheets
Communication Cables







