Receive a Text Quote
We will send you price and availability shortly
Invalid number. Please call (800) 691-8511
Looking for a fast quote? Click here, and we'll text you.

2-year Warranty

Same Day Shipping

Siemens 6AV6644-8AB20-0AA1

2 ratings

Select Condition


1 in stock


Request a formal quote

  • Ships Today
  • 2 Year Warranty
  • Free Shipping
Part Number6AV6644-8AB20-0AA1
Model #6AV66448AB200AA1
Warranty2 Year
BacklightingDaylight readable display
BrightnessUp to 800 cd/m²
DimmingRange from 0 to 100 %
ContrastHigh up to 1000: 1
StandardsAS/NZS 2064 (Class A), IEC 61131-2, Class I, Division 2, Group A, B, C, D Tx
Class I, Zone 2, Group IIC Tx
GlassMohs 7
MountingHorizontal, In control cabinets
Vertical MountingInclined at angle between 0° and 90°
DimensionsWidth 367+1 mm Height 289+1 mm Depth 105.5 mm
InterfacesHMI, RS 422/RS 485 interface X10/IF 1B,
PROFINET, ports X1 P1 and X1 P2,
USB ports X20 and X21,
Line in and micro, Line out

Our Repair Services

MRO Electric repairs CNCs, PLCs, Servo/Spindle Drives, Motors, Amplifiers, VFDs, HMIs, and more, most of which can be repaired in only 3-5 days.

Repair Benefits

MRO can restore your failed 6AV6644-8AB20-0AA1 to remanufactured condition and save you up to 75% compared to buying new. We offer standard repair pricing to ensure you the best value for your repair.

Our certified technicians use rigorous testing procedures to ensure your parts are restored to fully functioning condition. Our team proudly stands behind all repairs by providing a minimum 2-year warranty.

Our technicians have vast experience with most manufacturers and models. In addition to this 6AV6644-8AB20-0AA1 we also repair a wide range of other Siemens products, so if you don’t see the model you need, please contact us.

Core Exchange

If you are interested in getting credit for your faulty 6AV6644-8AB20-0AA1, just let us know, and we can issue you an RMA to send it in as an exchange. Our exchange program provides you with savings and keeps us stocked for the next time you need anything.

  • Shipping Weight : 1lb

Want it shipped today?

  • Order within the next 7 hours and 16 minutes.
  • If you order between 4pm and 6pm EST, you will be charged a small rush fee.

Ask about exchanging your faulty 6AV6644-8AB20-0AA1 for credit when ordering from MRO Electric

MRO Electric provides a 2-year warranty on every item we sell and repair. We stand behind all of our products and guarantee them for the full 2 years. If there is an issue with any of our products within the warranty period, we will evaluate the unit and repair or replace it under warranty.

Siemens 6AV6644-8AB20-0AA1 Overview

The Siemens SIMATIC HMI device, known as the "MP 377 15" Touch daylight readable", is a specialized display and touch technology that has been designed specifically for use in bright light conditions. Its transflective display allows for good readability even in direct sunlight, making it ideal for use in control cabins on drilling rigs and control stations on ships. The backlighting of the display can be dimmed both on the display itself and externally through a process value such as a potentiometer connected to the PLC, allowing operators to adjust the brightness to suit their needs. These products are manufactured in Germany and are designed for Automotive, aerospace, power generation, and electronics usage. They come with a 2-year warranty from MRO Electric. We also carry HMIs from other manufacturers such as FANUC and Yaskawa.


In addition to its suitability for use in bright light conditions, the HMI device has also been designed to withstand tough environmental conditions. Its device front is made of an aluminum frame coated in impact-resistant paint and is protected by a decorative foil with UV protection. The touch surface is made of hardened glass, which is resistant to dust, humidity, and extreme temperatures, and the device has a high resistance to commercial cleaning agents and chemicals. It has also been certified for use in potentially explosive areas, and approval for use in shipbuilding is currently being obtained for several countries.


The MP 377 15" Touch daylight readable comes with a range of features that make it suitable for use in daylight applications. It has a high brightness of up to 800 cd/m² and a contrast ratio of up to 1000: 1, as well as excellent saturation and a wide viewing angle of up to 160 degrees. Its energy-efficient LED backlighting has a dimming range of 0 to 100%, and the transflective technology combines the benefits of reflective and transmissive displays for optimal readability in any lighting condition. The device is also fanless, allowing for quiet operation, and can be installed vertically or at an angle in a control cabinet.


In addition to the HMI device, the scope of delivery includes a CD with installation files and a readme file, as well as a pouch with mounting clamps and a mains terminal for power supply. The device has CE, UL, and FM approvals, as well as a tick mark for use in Australia. Overall, the Siemens SIMATIC MP 377 15" Touch daylight readable is a reliable and versatile HMI device that is suitable for use in a wide range of environments and applications.


Contact Us Today For More Information About Siemens Products

Check out the rest of our Siemens product line. Whether it's using our online instant quote feature, giving us a call at (800) 691-8511, or emailing us at, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like 6AV6644-8AB20-0AA1, take a look at more from our HMIs line. If your current unit has gone bad, take advantage of our Core Exchange program for the most inexpensive route. You can learn more about this program on our FAQ page here. We offer a repair service on all of our 6AV6644-8AB20-0AA1 products that keep your downtime to a minimum. To stay up to date on manufacturer news, as well as access any of our datasheets, manuals, or other documentation, we suggest you take a look at our blog.

5 stars

4.9 Overall Satisfaction Rating

Over 1700 Ratings from Actual Customers

Read Our Reviews

Very happy with the overall service, delivery, communication and delivery,

Conley Cooke

I needed a special drive, found it, and I was quickly assisted by Joe Kaminski. Everything was exactly as it should be....


We have an older DMU80 CNC Machine and the Handheld Control was damaged beyond repair. MRO was very helpful in confirmin...

Abbey-Purchasing Specialist