OFT-21W04
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OFT-21W04
*Price on request. Contact us for a quote.
Manufacturer: Avalue
- Intel® Celeron™ Processor J3455
- 4GB LPDDR3
- 32GB eMMC
- CE, FCC Class A
The Avalue OFT-21W04 is a 21.5" open-frame industrial tablet featuring an Intel® Celeron® Processor J3455, 4GB LPDDR3 memory, and 32GB eMMC storage. It includes a projected capacitive (PCAP) multi-touch screen and supports various connectivity options, including USB, HDMI, and LAN. The tablet is designed for industrial applications, with an operating temperature range from -20°C to 60°C, and offers versatile power input options.
Processor
Intel® Celeron® Processor J3455
System Memory
4GB LPDDR3 SO-DIMM
LCD Size
21.5"
Display Type
Full HD
Resolution
1920 x 1080
Pixel pitch
0.24795 x 0.24795 mm
Luminance
250 cd/m²
Contrast ratio
3000
Viewing angle
89 (U), 89 (D), 89 (L), 89 (R)
Response time
30 ms
Backlight
LED
Touch Type
PCAP
Touch Light Transmission
85%
LCD Panel
TFT LCD
Storage
32GB eMMC
External I/O Connector
1 x 10/100/1000 RJ45 Powered LAN
1 x DC Jack
1 x Headphone Jack
1 x HDMI 1.4 Out
1 x Reset
2 x USB 3.0 Type A
Internal I/O Connector
1 x A-MIC
1 x DC Input
1 x DIO
1 x M.2 3042 B-Key or M.2 2242 B-key
1 x Micro USB
1 x MIPI DSI
1 x RS232 (Tx/Rx/Rts/Cts) interface
1 x RS232 (Tx/Rx/Rts/Cts) , RS485 (Tx/Rx/Rts/Cts)
1 x SD card slot
1 x Speaker
1 x Touch Button
WLAN
WIFI 802.11 a/b/g/n/ac
Multiple Display
LVDS + HDMI
Certification Information
CE, FCC Class A
DC Input
DC 12~24V
OS Information
2019 Windows 10 (64 bit) IoT LTSC, Ubuntu 20.04
Operating Temperature
0°C ~ 40°C (32°F ~ 104°F)
Storage Temperature
-20°C ~ 60°C (-4°F ~ 140°F)
Operating Humidity
40°C @ 95% Relative humidity, Non-condensing
Weight
4.3 kg
Dimension (W x L x H)
515 x 322 x 53.7mm
Power Requirement
DC 12~24V
Ordering Information
OFT-21W04-3410-A1R : OFT-21W04-4G_32G-Ubuntu 20.04
OFT-21W04-3411-A1R : OFT-21W04-4G_32G-Win10
OFT-21W04-3412-A1R : OFT-21W04-4G_32G-Non OS
Frequently Asked Questions
An Open Frame Touch Panel PC is a industrial-grade computing device with a touchscreen display designed without an external housing or chassis, allowing it to be integrated directly into custom enclosures, kiosks, or control panels. These systems feature a slim profile with mounting brackets around the edges for easy installation, and are ideal for applications in industrial automation, kiosks, digital signage, and control systems.
Open Frame Panel PCs offer easier integration into custom enclosures, flexible mounting options, space savings with slim profiles, customizable front bezels to match application aesthetics, often lower cost due to simplified construction, and adaptability for specialized environments. They maintain the ruggedness and reliability of industrial Panel PCs while providing more installation versatility.
Open Frame Panel PCs typically offer multiple mounting options including panel/cutout mounting using the brackets around the frame's periphery, VESA mounting patterns (75mm x 75mm or 100mm x 100mm) for attachment to arms or stands, and custom mounting solutions through pre-drilled mounting holes. The open frame design specifically facilitates flush integration into custom enclosures, control panels, and kiosk systems.
Resistive touchscreens detect pressure and can be operated with gloves, styluses, or any object, making them ideal for industrial environments where operators may wear gloves. Capacitive touchscreens offer superior clarity, multi-touch capability, and durability but require a conductive input (like a bare finger). OFT models offer both options to suit different application needs and environmental conditions.
OFT Panel PCs are designed with front bezels that can achieve IP65 protection rating when properly installed in an enclosure, protecting against dust and water splashes from the front. The open frame design allows system integrators to incorporate the panel into custom enclosures that can provide additional environmental protection appropriate for the specific installation environment.
The OFT-21W04 features a 21.5" Full HD (1920x1080) display, ARM Cortex-A17 quad-core processor, 2GB DDR3 memory, 16GB eMMC storage, projected capacitive multi-touch screen, Android 8.1 operating system, multiple I/O options including USB, HDMI, and LAN ports, and wide voltage input (12-24V DC), making it ideal for cost-effective HMI and digital signage applications.
The Android 8.1 OS on the OFT-21W04 provides several advantages including energy efficiency for extended operation with minimal power consumption, access to thousands of industrial and commercial Android applications, simplified and familiar touch-optimized interface, built-in security features with regular updates, and lower licensing costs compared to Windows-based systems for multi-unit deployments.
The ARM Cortex-A17 architecture in the OFT-21W04 offers excellent energy efficiency for reduced power consumption and heat generation, sufficient performance for HMI and information display applications, compact design with fewer cooling requirements, competitive price point for large deployments, and optimized performance with the Android operating system for responsive user interface experiences.
Open frame design refers to a display or Panel PC constructed without an external housing or chassis, featuring only a front bezel with mounting brackets. This design offers advantages including flexible integration into custom enclosures, kiosks, or control panels; reduced depth and weight compared to fully enclosed systems; ability to achieve a flush, seamless appearance in the final installation; and customization options for specialized industrial or commercial applications.
Resistive touchscreens detect physical pressure, work with any input device (gloved fingers, styluses), offer good durability against chemicals and harsh environments, but provide less clarity and no multi-touch. Projected capacitive (PCAP) touchscreens detect electrical properties of the human body, offer superior optical clarity, multi-touch capability, and better durability against surface scratches, but typically require a bare finger or conductive stylus.
OFT and OFR series achieve environmental protection through front bezels designed to meet IP65 standards when properly installed in an enclosure. This is accomplished using specialized gaskets and seals around the display perimeter, watertight mounting brackets, sealed touchscreen-to-bezel bonding, and proper installation techniques. While the rear remains open by design, the front protection prevents dust and water ingress from the exposed face of the installation.
Wide voltage input (typically 9-36V DC or 12-24V DC) allows OFT Panel PCs to operate reliably with various power sources and in environments with fluctuating power conditions. This flexibility accommodates different industrial power standards, handles voltage drops in long cable runs, provides tolerance against surges or sags, and eliminates the need for additional power conditioning equipment in challenging industrial settings.
Important mounting considerations include securing all mounting brackets evenly to prevent display distortion or stress, maintaining proper clearance for cooling, ensuring the mounting surface can support the weight, applying the correct torque to mounting hardware, installing appropriate gaskets for environmental protection, planning for cable management, and considering accessibility for maintenance while maintaining the specified IP protection rating at the front surface.
Open frame Panel PCs typically support several mounting methods: panel mount/cutout installation where the device is inserted into a cabinet cutout and secured with mounting brackets; VESA mount using standard 75x75mm or 100x100mm patterns; direct mounting to a flat surface using the pre-drilled holes on the chassis; and custom mounting solutions for specialized applications like kiosks or machine integration, each requiring specific considerations for proper support and environmental protection.
Best practices for cabling include: planning cable routes to prevent stress on connectors, using appropriate cable ties or management systems to secure cables without pinching, implementing strain relief to prevent tension on connections, maintaining minimum bend radius for each cable type, keeping power cables separate from signal cables to prevent interference, using appropriate length cables to avoid excess loops, and ensuring all connections are secure and protected from physical damage or environmental exposure.
Cutout dimensions for panel mounting must follow manufacturer specifications exactly, typically allowing for a 1-2mm tolerance. Important considerations include measuring the active display area plus bezel (not just the screen), accounting for mounting brackets and their clearance needs, ensuring sufficient depth behind the panel for cables and connectors, verifying the panel material is strong enough to support the device weight, and planning for proper sealing to maintain environmental ratings.
To optimize touch functionality: ensure the touch controller cable is properly connected, install correct touch drivers for the operating system, run calibration utilities after installation, avoid mounting near sources of electrical interference, ensure the mounting implementation doesn't put pressure on the display edges which could affect touch accuracy, and test touch functionality across the entire screen before finalizing installation to confirm proper operation throughout.
For touch issues: ensure the touch cable is properly connected internally, check for physical damage to the screen surface, verify touch drivers are properly installed and updated, run the operating system's touch calibration utility, check for sources of electrical interference near the device, ensure no mounting pressure is affecting the display edges, test with another application to isolate software-specific issues, and for persistent problems, contact technical support.
For display issues: verify the power source is within specified voltage range, check all video connections are secure, confirm the input source is working with another display if possible, verify the correct input is selected via OSD controls, adjust brightness settings if the image is very dim, check for physical damage to cables or connectors, and test with different resolution settings as some displays have optimal resolution requirements for proper image reproduction.
For overheating: verify the ambient temperature is within specified operating range, ensure adequate clearance around the unit for passive cooling, check that mounting hasn't restricted heat dissipation from the rear, avoid installation near other heat-generating equipment, consider adding auxiliary cooling for installations in high-temperature environments, check resource-intensive applications that may be causing high CPU usage, and verify the device firmware and drivers are updated to the latest versions.
If the unit won't power on: check power supply connections and verify output voltage is correct, inspect power cables for damage, verify internal power connections are secure if recently serviced, check for LED indicators that might signal power presence, try an alternative power supply meeting the specified requirements, reset the device by disconnecting power for 30 seconds, and if possible, connect a known working display to the same power source to determine if the power supply is functioning correctly.