HMI / PLC
Pro-face LT4000M Series HMI / PLC
Hybrid HMI with built-in control and I/O in 3.5 and 5.7 inch sizes; it mounts in a 22 mm push-button hole and offers digital and analogue I/O and CANopen.
Key specifications
| Interface | COM, LAN, USB, DIO, AIO, CANopen |
|---|---|
| Display | 3.5–5.7 |
| Mounting | 22 mm (φ22) hole mounting |
Summarised in our own words from Schneider Electric (Schneider Electric Japan Holdings Ltd.)'s published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Notes on this data
I/O counts, logic languages, IP and temperature not stated on the page read.
Specify Motion is not affiliated with Schneider Electric (Schneider Electric Japan Holdings Ltd.). Pro-face and LT4000M Series are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
Alternatives that meet or exceed these figures
Engineers often come to us with a Pro-face part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These series from our supply network is the closest match on published figures.
All-in-one 4.3" or 7" touchscreen with a built-in PLC: high-speed pulse outputs, RS485, Ethernet and KS expansion; HMI in DTools, PLC in CODESYS.
View MK (MK070E / MK043E) →Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
What a HMI / PLC is
An HMI/PLC is an all-in-one controller that combines an operator touchscreen and a PLC in one unit. The PLC runs logic and I/O control, often with high-speed counters and pulse outputs for simple motion, while the screen provides the operator interface. Communication ports such as RS485 and Ethernet connect to drives and other devices, and expansion modules add I/O. Programming uses one or two software tools for screens and logic.
When engineers choose a HMI / PLC
Choose an HMI/PLC for compact machines that need both logic and an operator interface at low cost and with minimal panel space, such as small packaging machines, test rigs and process skids. It reduces wiring and components. The trade-offs are scalability and flexibility: I/O, processing power and motion capability are limited compared with separate PLCs, and replacing the screen means replacing the controller.
How to specify the Pro-face LT4000M Series
Send these with your enquiry and an engineer can confirm the right LT4000M Series variant or an equivalent:
- Screen size (inches)
- I/O count and expansion
- High-speed counters and pulse outputs
- Communication ports and protocols
- Programming software
- Supply voltage
- Front IP rating
Common mistakes to avoid
- Outgrowing I/O or memory as the machine develops
- Expecting multi-axis motion from pulse outputs
- Ignoring software licensing or version issues
- Not planning spare strategy for a combined unit
Pro-face LT4000M Series: frequently asked questions
What is the Pro-face LT4000M Series?
Hybrid HMI with built-in control and I/O in 3.5 and 5.7 inch sizes; it mounts in a 22 mm push-button hole and offers digital and analogue I/O and CANopen. It is made by Schneider Electric (Schneider Electric Japan Holdings Ltd.); Specify Motion can help source it or propose an equivalent.
Who makes the Pro-face LT4000M Series?
The Pro-face LT4000M Series is made by Pro-face (Schneider Electric (Schneider Electric Japan Holdings Ltd.)) and is listed here for engineers comparing options. Specify Motion is not affiliated with Schneider Electric (Schneider Electric Japan Holdings Ltd.); brand names are used only to identify the product.
Is there an alternative to the Pro-face LT4000M Series?
Yes. On published figures, Kinco MK (MK070E / MK043E) is the closest match from our supply network. An engineer confirms the fit against your application before recommending anything.
When should I choose an all-in-one HMI/PLC?
Choose one when a machine needs an operator screen and moderate logic and I/O in a small, low-cost package. It saves panel space and wiring. For larger machines, many axes or future expansion, separate PLC and HMI components offer more scalability.
Can an HMI/PLC control stepper or servo motors?
Many offer high-speed pulse outputs for step and direction control of a few stepper or servo drives, which suits simple positioning. Coordinated multi-axis motion usually needs a motion controller or PLC with a real-time network. Check the number of pulse outputs and maximum frequency.
Further reading: How to select an hmi and remote io · How to select a motion controller or plc · Controllers and PLCs
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