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2711P-K4M20A8

Rated 5 with 20 reviews
About | Product Specifications | FAQ
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2711P-K4M20A8

Description: The Allen-Bradley 2711P-K4M20A8 terminal is a display terminal that is available from the Allen-Bradley PanelView Plus 6 series of terminals. Its display screen is 3.5 inches wide and its graphics are grayscale graphics. The 2711P-K4M20A8 terminal does not support a touchscreen, but it has a keypad for control. It also has 256 MB of RAM. The 2711P-K4M20A8 terminal has Ethernet and RS-232 communication ports as well as USB host and USB device ports.
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Description:

The Allen-Bradley 2711P-K4M20A8 terminal is a display terminal that is available from the Allen-Bradley PanelView Plus 6 series of terminals. Its display screen is 3.5 inches wide and its graphics are grayscale graphics. The 2711P-K4M20A8 terminal does not support a touchscreen, but it has a keypad for control. It also has 256 MB of RAM. The 2711P-K4M20A8 terminal has Ethernet and RS-232 communication ports as well as USB host and USB device ports.


About | Products Specs | FAQ

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Warranty: 1 year DO Supply Warranty Included
Shipping: Worldwide shipping via DHL, UPS, Fedex, and TNT
Repairs: We offer repair service for the 2711P-K4M20A8.
Exchange: Exchange credit for your defective unit available.

To speak to a sales representative for pricing & lead time:


Rated 5 with 20 reviews

    Technical Specifications for 2711P-K4M20A8

BrandAllen-Bradley
BacklightWhite LED, not replaceable; 25,000 hours min at 25 °C (77 °F)
SoftwareFactoryTalk View Machine Edition runtime
Display Size3.5 inches
Part Number/Catalog No.2711P-K4M20A8
ManufacturerRockwell Automation / Allen-Bradley
Product Family:PanelView Plus 6 Graphic Terminals
Display Type:Grayscale TFT LCD
Display Area:70 x 53 mm (2.8 x 2.3 in.)
Resolution:320 x 240, 16-levels gray
Keypad:8 function keys (F1…F8), Numeric input, navigation
System Memory:256 MB RAM, 512 MB nonvolatile memory (approx. 73 MB free user memory)
Communication ports:Ethernet (10/100 Mbps, Auto-MDI/MDI-X), RS-232, 1 USB host, 1 USB device port
External storage:Secure Digital (SD) card, cat. no.1784-SDx, supported by hot-swappable SD card slot USB flash drive that is supported by high-speed, hot-swappable, 2.0 USB host port
Input Voltage range:100 to 240V AC, 50 to 60 Hz
Power Consumption:35VA max, 20VA typical
Weight:473 g (1.04 lb)
Operating system:Windows CE 6.0
Product LinePanelview 6 Plus
Display ColorMonochrome
Input TypeKeypad
CommunicationEthernet and RS-232
Input Power100-240 VAC
Memory256 MB RAM
Communication Cable2711-NC14
Shipping Weight5 lbs.
Shipping Dimensions14 x 11 x 8 in
SeriesSeries A and Series B
Firmware7.00-8.10
BrandAllen-Bradley
BacklightWhite LED, not replaceable; 25,000 hours min at 25 °C (77 °F)
SoftwareFactoryTalk View Machine Edition runtime
Display Size3.5 inches
Part Number/Catalog No.2711P-K4M20A8
ManufacturerRockwell Automation / Allen-Bradley
Product Family:PanelView Plus 6 Graphic Terminals
Display Type:Grayscale TFT LCD
Display Area:70 x 53 mm (2.8 x 2.3 in.)
Resolution:320 x 240, 16-levels gray
Keypad:8 function keys (F1…F8), Numeric input, navigation
System Memory:256 MB RAM, 512 MB nonvolatile memory (approx. 73 MB free user memory)
Communication ports:Ethernet (10/100 Mbps, Auto-MDI/MDI-X), RS-232, 1 USB host, 1 USB device port
External storage:Secure Digital (SD) card, cat. no.1784-SDx, supported by hot-swappable SD card slot USB flash drive that is supported by high-speed, hot-swappable, 2.0 USB host port
Input Voltage range:100 to 240V AC, 50 to 60 Hz
Power Consumption:35VA max, 20VA typical
Weight:473 g (1.04 lb)
Operating system:Windows CE 6.0
Product LinePanelview 6 Plus
Display ColorMonochrome
Input TypeKeypad
CommunicationEthernet and RS-232
Input Power100-240 VAC
Memory256 MB RAM
Communication Cable2711-NC14
Shipping Weight5 lbs.
Shipping Dimensions14 x 11 x 8 in
SeriesSeries A and Series B
Firmware7.00-8.10
s

About 2711P-K4M20A8

The Allen-Bradley 2711P-K4M20A8 is part PanelView Plus 6 400 Monochrome operator terminal. This operator terminal or Human Machine Interface (HMI) device is ideally used in micro and small automation requirements. It is a compact electronic device that permits addition of components as required by the process.

The 2711P-K4M20A8 is powered by an external supply voltage ranging 100-240V AC along frequency of 50-60 Hz. It has a maximum power consumption of 35VA and typical consumption of 20VA. This operator terminal comes with a Battery-backed clock that timestamps critical data with accuracy of ±2 minutes per month. The battery is expected to last up to 4 years when operated at a minimum temperature of min at 25 °C (77 °F). This battery is field replaceable with catalog number 2711P-RY2032 or any equivalent CR2032 coin-cell lithium battery.

The 2711P-K4M20A8 has a system memory amounting to 256 Random Access Memory (RAM) and 512 Non-volatile memory with approximately 73 MB free user memory. This system memory may be expanded by installation of a Secure Digital (SD) Card. USB flash drives may also serve as removable storage by inserting to any of the available USB ports.

This operator terminal comes with a variety of communication interfaces such as One (1) RS232 and One (1) Ethernet communication ports. Two (2) USB ports are also available that permits installation of USB and keyboard and USB as mentioned previously.

The 2711P-K4M20A8 has a visualization screen that is a Monochrome LCD and Keypad assembly provided as the main operator interface. It features an integrated Windows Compact Embedded (C.E.) operating system and pre-installed FactoryTalk View Machine edition runtime software.

The Ethernet/IP (Ethernet Industrial Protocol) is an open industrial network that supports real time I/O messaging, as well as message exchange. The Ethernet port connects to a controller on an EtherNet/IP network by using both the network and standard Ethernet connections. This port can work with application transfers and printing as well. The 2711P-RN20 Ethernet communication module is available for the 700 to 1500 terminals if another Ethernet port is required. The module has its own unique IP address. This port has an RJ45, 10/100Base-T connector for network communication and supports MDI/MDI-X connections. The parameters are downloaded with the application.



FAQ for 2711P-K4M20A8

Does the 2711P-K4M20A8 come with a colored display screen?


No. The 2711P-K4M20A8 has a monochrome display only.

Does the 2711P-K4M20A8 supports installation of external memory devices?


Yes. Secure Digital (SD) card and removable flash drives may be used as removable storage.

Does the 2711P-K4M20A8 require purchase of additional license for operation?


The 2711P-K4M20A8 has pre-activated Windows CE 6.0 and FactoryTalk View software.

Technical Description of 2711P-K4M20A8

PanelView Plus 6 Operator interface , 400 Terminal, Keypad, Grayscale Display, Ethernet and RS-232 Communication, AC Powered Unit, and the Windows CE 6.0 Operating System

Repair Services for 2711P-K4M20A8

Type Lead Time Price Action
Repair Service 2-4 weeks $2536.2cartAdd to Cart

We Can Repair Your Panelview Plus 6

We have a team of highly trained technicians that can repair your Panelview Plus 6 quickly at a great low price. To get a repair quote call 1-800-730-0292 or email sales@dosupply.com. Some of the benefits of our repair process includes:

  • Repair Turnaround of 3-5 Days for Most Panelview Plus 6
  • Rush Repairs of 1-3 Days
  • Fast Return of Your Repair via UPS, FedEx, or DHL.
  • If the item is not repairable, you can choose to have it returned to you free of charge or it can be counted as an exchange credit toward a refurbished or surplus unit if available.
  • Wide range of repairs that can be completed by our highly skilled technicians as shown below.
  • All Repairs Come With Our 1-Year Warranty!

Repair Capabilities

We Can Repair Your Hardware Failures Including:

  • Communication Failures
  • Broken Toushcreens/Keypads
  • Broken Glass
  • Displays (Dead/Dim/Lines/Missing Pixels)
  • Dead Backlights
  • Broken Housing/Bezel
  • Power Board Failures

Start UP Error Codes and Messages:

    • Load firmware image into RAM Update 1E
    • Write firmware image to storage Update A5
    • Load factory-default firmware image into RAM Restore E6
    • Write factory-default firmware image to storage Restore A5
    • Restore factory-default configuration data Restore DC
    • Firmware validation (CRC/format) failure Fatal 1E
    • Firmware failed to validate compatibility index of a firmware region Fatal 1F
    • Firmware update failure Fatal 0F
    • Firmware write to storage failure Fatal A5
    • Firmware stored image verification failure Fatal D2
    • Invalid or missing OS firmware image Fatal FF
    • Failed RAM Fatal 03
    • Stuck key Fatal 31
    • Stuck touch Fatal 3A
    • Failed backlight Fatal 3B
    • Failed to initialize restore operation Fatal R0
    • Failed restore because of invalid header in .pvb file Fatal R1
    • Failed restore because of invalid header Fatal R2
    • Failed restore because of inability to write intermediate files to terminal Fatal R3
    • Failed restored because of corrupt .pvb file Fatal R4
    • Watch dog reset Fatal 02
    • Boot loader attempting PC connection via USB device AutoTest OA
    • Boot loader loads firmware image into RAM AutoTest E6
    • Boot loader jumps to operating system AutoTest FF
    • Operating system starts up Boot G0
    • Operating system registration and initialization Init H1 - JA
    • Machine Edition registration and initialization Init K1 - MA
    • Machine Edition load and execute Init ME

Revisions for 2711P-K4M20A8

Please refer to the manual for more information about the 2711P-K4M20A8 such as the wiring diagrams, data sheets, firmware information and migration or obsolescence details.

Revision Part # Also Known as Availability
2711P-K4M20A8 Ser A
2711P-K4M20A8/A, Series A, Rev A Request Quote
2711P-K4M20A8X
2711P-K4M20A8/X, Series X, Rev X Request Quote
Common misspellings:
  • 27l1P-K4M20A8
  • 271lP-K4M20A8
  • 2711P-KAM20A8
  • 2711P-K4M2oA8
  • 2711P-K4M20Ab
  • 2711PK4M20A8

Reviews for 2711P-K4M20A8

User Input Method

"This Allen Bradley Panelview Plus 6 has Keypad Interface, but has no touchscreen. " -DO Supply Tech

Internal Review

"The 2711P-K4M20A8 is an Allen-Bradley PanelView Plus 6 400 operator terminal. With this operator terminal having a 3.5-inch monochrome screen and keypad input interface, this operator terminal is ideally used for simple applications that does not require an elaborate graphic display as the screen size can only display limited number of devices and limited information at a time. Additionally, the keypad interface is not as user-friendly compared to a touchscreen operator terminal. " -DO Supply Tech

Dimensions For 2711P-K4M20A8

Size 3.5 inch 400 Grayscale
Input Type Keypad
Panel Cutout Height 123 mm (4.86 in)
Panel Cutout Width 156 mm (6.15 in)
Terminal Height 152 mm (6.0 in)
Terminal Width 185 mm (7.28 in)
Terminal Overall Depth 60 mm (2.35 in)
Terminal Mounted Depth 90 mm (3.54 in)

Dimensions For 2711P-K4M20A8

Resolutions For 2711P-K4M20A8

Size 3.5 inch 400 Grayscale
Input Type Keypad or Keypad/ Touch
Display Type Grayscale TFT LCD
Display Size (Diagonal) 3.5 in.
Viewing Area 70 x 53 mm (2.8 x 2.3 in.)
Display Resolution 320 x 240, 16-levels gray
Typical Brightness 320 cd/m2 (Nits)
About

Technical Specifications for 2711P-K4M20A8

BrandAllen-Bradley
BacklightWhite LED, not replaceable; 25,000 hours min at 25 °C (77 °F)
SoftwareFactoryTalk View Machine Edition runtime
Display Size3.5 inches
Part Number/Catalog No.2711P-K4M20A8
ManufacturerRockwell Automation / Allen-Bradley
Product Family:PanelView Plus 6 Graphic Terminals
Display Type:Grayscale TFT LCD
Display Area:70 x 53 mm (2.8 x 2.3 in.)
Resolution:320 x 240, 16-levels gray
Keypad:8 function keys (F1…F8), Numeric input, navigation
System Memory:256 MB RAM, 512 MB nonvolatile memory (approx. 73 MB free user memory)
Communication ports:Ethernet (10/100 Mbps, Auto-MDI/MDI-X), RS-232, 1 USB host, 1 USB device port
External storage:Secure Digital (SD) card, cat. no.1784-SDx, supported by hot-swappable SD card slot USB flash drive that is supported by high-speed, hot-swappable, 2.0 USB host port
Input Voltage range:100 to 240V AC, 50 to 60 Hz
Power Consumption:35VA max, 20VA typical
Weight:473 g (1.04 lb)
Operating system:Windows CE 6.0
Product LinePanelview 6 Plus
Display ColorMonochrome
Input TypeKeypad
CommunicationEthernet and RS-232
Input Power100-240 VAC
Memory256 MB RAM
Communication Cable2711-NC14
Shipping Weight5 lbs.
Shipping Dimensions14 x 11 x 8 in
SeriesSeries A and Series B
Firmware7.00-8.10
BrandAllen-Bradley
BacklightWhite LED, not replaceable; 25,000 hours min at 25 °C (77 °F)
SoftwareFactoryTalk View Machine Edition runtime
Display Size3.5 inches
Part Number/Catalog No.2711P-K4M20A8
ManufacturerRockwell Automation / Allen-Bradley
Product Family:PanelView Plus 6 Graphic Terminals
Display Type:Grayscale TFT LCD
Display Area:70 x 53 mm (2.8 x 2.3 in.)
Resolution:320 x 240, 16-levels gray
Keypad:8 function keys (F1…F8), Numeric input, navigation
System Memory:256 MB RAM, 512 MB nonvolatile memory (approx. 73 MB free user memory)
Communication ports:Ethernet (10/100 Mbps, Auto-MDI/MDI-X), RS-232, 1 USB host, 1 USB device port
External storage:Secure Digital (SD) card, cat. no.1784-SDx, supported by hot-swappable SD card slot USB flash drive that is supported by high-speed, hot-swappable, 2.0 USB host port
Input Voltage range:100 to 240V AC, 50 to 60 Hz
Power Consumption:35VA max, 20VA typical
Weight:473 g (1.04 lb)
Operating system:Windows CE 6.0
Product LinePanelview 6 Plus
Display ColorMonochrome
Input TypeKeypad
CommunicationEthernet and RS-232
Input Power100-240 VAC
Memory256 MB RAM
Communication Cable2711-NC14
Shipping Weight5 lbs.
Shipping Dimensions14 x 11 x 8 in
SeriesSeries A and Series B
Firmware7.00-8.10

About 2711P-K4M20A8

The Allen-Bradley 2711P-K4M20A8 is part PanelView Plus 6 400 Monochrome operator terminal. This operator terminal or Human Machine Interface (HMI) device is ideally used in micro and small automation requirements. It is a compact electronic device that permits addition of components as required by the process.

The 2711P-K4M20A8 is powered by an external supply voltage ranging 100-240V AC along frequency of 50-60 Hz. It has a maximum power consumption of 35VA and typical consumption of 20VA. This operator terminal comes with a Battery-backed clock that timestamps critical data with accuracy of ±2 minutes per month. The battery is expected to last up to 4 years when operated at a minimum temperature of min at 25 °C (77 °F). This battery is field replaceable with catalog number 2711P-RY2032 or any equivalent CR2032 coin-cell lithium battery.

The 2711P-K4M20A8 has a system memory amounting to 256 Random Access Memory (RAM) and 512 Non-volatile memory with approximately 73 MB free user memory. This system memory may be expanded by installation of a Secure Digital (SD) Card. USB flash drives may also serve as removable storage by inserting to any of the available USB ports.

This operator terminal comes with a variety of communication interfaces such as One (1) RS232 and One (1) Ethernet communication ports. Two (2) USB ports are also available that permits installation of USB and keyboard and USB as mentioned previously.

The 2711P-K4M20A8 has a visualization screen that is a Monochrome LCD and Keypad assembly provided as the main operator interface. It features an integrated Windows Compact Embedded (C.E.) operating system and pre-installed FactoryTalk View Machine edition runtime software.

The Ethernet/IP (Ethernet Industrial Protocol) is an open industrial network that supports real time I/O messaging, as well as message exchange. The Ethernet port connects to a controller on an EtherNet/IP network by using both the network and standard Ethernet connections. This port can work with application transfers and printing as well. The 2711P-RN20 Ethernet communication module is available for the 700 to 1500 terminals if another Ethernet port is required. The module has its own unique IP address. This port has an RJ45, 10/100Base-T connector for network communication and supports MDI/MDI-X connections. The parameters are downloaded with the application.



FAQ for 2711P-K4M20A8

Does the 2711P-K4M20A8 come with a colored display screen?


No. The 2711P-K4M20A8 has a monochrome display only.

Does the 2711P-K4M20A8 supports installation of external memory devices?


Yes. Secure Digital (SD) card and removable flash drives may be used as removable storage.

Does the 2711P-K4M20A8 require purchase of additional license for operation?


The 2711P-K4M20A8 has pre-activated Windows CE 6.0 and FactoryTalk View software.

Technical Description of 2711P-K4M20A8

PanelView Plus 6 Operator interface , 400 Terminal, Keypad, Grayscale Display, Ethernet and RS-232 Communication, AC Powered Unit, and the Windows CE 6.0 Operating System
Repairs
Type Lead Time Price Action
Repair Service 2-4 weeks $2536.2cartAdd to Cart

We Can Repair Your Panelview Plus 6

We have a team of highly trained technicians that can repair your Panelview Plus 6 quickly at a great low price. To get a repair quote call 1-800-730-0292 or email sales@dosupply.com. Some of the benefits of our repair process includes:

  • Repair Turnaround of 3-5 Days for Most Panelview Plus 6
  • Rush Repairs of 1-3 Days
  • Fast Return of Your Repair via UPS, FedEx, or DHL.
  • If the item is not repairable, you can choose to have it returned to you free of charge or it can be counted as an exchange credit toward a refurbished or surplus unit if available.
  • Wide range of repairs that can be completed by our highly skilled technicians as shown below.
  • All Repairs Come With Our 1-Year Warranty!

Repair Capabilities

We Can Repair Your Hardware Failures Including:

  • Communication Failures
  • Broken Toushcreens/Keypads
  • Broken Glass
  • Displays (Dead/Dim/Lines/Missing Pixels)
  • Dead Backlights
  • Broken Housing/Bezel
  • Power Board Failures

Start UP Error Codes and Messages:

    • Load firmware image into RAM Update 1E
    • Write firmware image to storage Update A5
    • Load factory-default firmware image into RAM Restore E6
    • Write factory-default firmware image to storage Restore A5
    • Restore factory-default configuration data Restore DC
    • Firmware validation (CRC/format) failure Fatal 1E
    • Firmware failed to validate compatibility index of a firmware region Fatal 1F
    • Firmware update failure Fatal 0F
    • Firmware write to storage failure Fatal A5
    • Firmware stored image verification failure Fatal D2
    • Invalid or missing OS firmware image Fatal FF
    • Failed RAM Fatal 03
    • Stuck key Fatal 31
    • Stuck touch Fatal 3A
    • Failed backlight Fatal 3B
    • Failed to initialize restore operation Fatal R0
    • Failed restore because of invalid header in .pvb file Fatal R1
    • Failed restore because of invalid header Fatal R2
    • Failed restore because of inability to write intermediate files to terminal Fatal R3
    • Failed restored because of corrupt .pvb file Fatal R4
    • Watch dog reset Fatal 02
    • Boot loader attempting PC connection via USB device AutoTest OA
    • Boot loader loads firmware image into RAM AutoTest E6
    • Boot loader jumps to operating system AutoTest FF
    • Operating system starts up Boot G0
    • Operating system registration and initialization Init H1 - JA
    • Machine Edition registration and initialization Init K1 - MA
    • Machine Edition load and execute Init ME
Type Lead Time Price Action
Repair Service 2-4 weeks $2536.2cartAdd to Cart

We Can Repair Your Panelview Plus 6

We have a team of highly trained technicians that can repair your Panelview Plus 6 quickly at a great low price. To get a repair quote call 1-800-730-0292 or email sales@dosupply.com. Some of the benefits of our repair process includes:

  • Repair Turnaround of 3-5 Days for Most Panelview Plus 6
  • Rush Repairs of 1-3 Days
  • Fast Return of Your Repair via UPS, FedEx, or DHL.
  • If the item is not repairable, you can choose to have it returned to you free of charge or it can be counted as an exchange credit toward a refurbished or surplus unit if available.
  • Wide range of repairs that can be completed by our highly skilled technicians as shown below.
  • All Repairs Come With Our 1-Year Warranty!

Repair Capabilities

We Can Repair Your Hardware Failures Including:

  • Communication Failures
  • Broken Toushcreens/Keypads
  • Broken Glass
  • Displays (Dead/Dim/Lines/Missing Pixels)
  • Dead Backlights
  • Broken Housing/Bezel
  • Power Board Failures

Start UP Error Codes and Messages:

    • Load firmware image into RAM Update 1E
    • Write firmware image to storage Update A5
    • Load factory-default firmware image into RAM Restore E6
    • Write factory-default firmware image to storage Restore A5
    • Restore factory-default configuration data Restore DC
    • Firmware validation (CRC/format) failure Fatal 1E
    • Firmware failed to validate compatibility index of a firmware region Fatal 1F
    • Firmware update failure Fatal 0F
    • Firmware write to storage failure Fatal A5
    • Firmware stored image verification failure Fatal D2
    • Invalid or missing OS firmware image Fatal FF
    • Failed RAM Fatal 03
    • Stuck key Fatal 31
    • Stuck touch Fatal 3A
    • Failed backlight Fatal 3B
    • Failed to initialize restore operation Fatal R0
    • Failed restore because of invalid header in .pvb file Fatal R1
    • Failed restore because of invalid header Fatal R2
    • Failed restore because of inability to write intermediate files to terminal Fatal R3
    • Failed restored because of corrupt .pvb file Fatal R4
    • Watch dog reset Fatal 02
    • Boot loader attempting PC connection via USB device AutoTest OA
    • Boot loader loads firmware image into RAM AutoTest E6
    • Boot loader jumps to operating system AutoTest FF
    • Operating system starts up Boot G0
    • Operating system registration and initialization Init H1 - JA
    • Machine Edition registration and initialization Init K1 - MA
    • Machine Edition load and execute Init ME
Revisions

Please refer to the manual for more information about the 2711P-K4M20A8 such as the wiring diagrams, data sheets, firmware information and migration or obsolescence details.

Revision Part # Also Known as Availability
2711P-K4M20A8 Ser A
2711P-K4M20A8/A, Series A, Rev A Request Quote
2711P-K4M20A8X
2711P-K4M20A8/X, Series X, Rev X Request Quote

Common misspellings:
  • 27l1P-K4M20A8
  • 271lP-K4M20A8
  • 2711P-KAM20A8
  • 2711P-K4M2oA8
  • 2711P-K4M20Ab
  • 2711PK4M20A8
PDF
2711P-K4M20A8 PDF
Dimensions

Dimension For 2711P-K4M20A8

Size 3.5 inch 400 Grayscale
Input Type Keypad
Panel Cutout Height 123 mm (4.86 in)
Panel Cutout Width 156 mm (6.15 in)
Terminal Height 152 mm (6.0 in)
Terminal Width 185 mm (7.28 in)
Terminal Overall Depth 60 mm (2.35 in)
Terminal Mounted Depth 90 mm (3.54 in)
Resolutions

Resolutions For 2711P-K4M20A8

Size 3.5 inch 400 Grayscale
Input Type Keypad or Keypad/ Touch
Display Type Grayscale TFT LCD
Display Size (Diagonal) 3.5 in.
Viewing Area 70 x 53 mm (2.8 x 2.3 in.)
Display Resolution 320 x 240, 16-levels gray
Typical Brightness 320 cd/m2 (Nits)
Reviews

Reviews for 2711P-K4M20A8

User Input Method

"This Allen Bradley Panelview Plus 6 has Keypad Interface, but has no touchscreen. " -DO Supply Tech

Internal Review

"The 2711P-K4M20A8 is an Allen-Bradley PanelView Plus 6 400 operator terminal. With this operator terminal having a 3.5-inch monochrome screen and keypad input interface, this operator terminal is ideally used for simple applications that does not require an elaborate graphic display as the screen size can only display limited number of devices and limited information at a time. Additionally, the keypad interface is not as user-friendly compared to a touchscreen operator terminal. " -DO Supply Tech