Avalue Technology OFT-21WR1 User manual

Part No. E201721R1A0R
OFT-21WR1
21.5" Open Frame Tablet
Quick Reference Guide
1st Ed –08 February 2022
Copyright Notice
Copyright 2022 Avalue Technology Inc., ALL RIGHTS RESERVED.

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Federal Communication Commission Interference Statement
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE
FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE AND
(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT
MAY CAUSE UNDESIRED OPERATION.
Note: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with the instruction, may cause
harmful interference to radio communications. However, there is no guarantee that interference will
not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
Consult the dealer or an experienced radio/TV technician for help.
Notice:
(1) A Unshielded-type power cord is required in order to meet FCC emission limits and also to prevent
interference to the nearby radio and television reception. It is essential that only the supplied
power cord by used.
(2) Use only shielded cables to connect I/O devices to this equipment.
(3) Changes or modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.

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FCC RF Radiation Exposure Statement
This Wireless LAN radio device has been evaluated under FCC Bulletin OET 65 and found compliant
to the requirements as set forth in CFR 47 Sections 2.1091, 2.1093, and 15.247 (b) (4) addressing RF
Exposure from radio frequency devices. The radiated output power of this Wireless LAN device is far
below the FCC radio frequency exposure limits. Nevertheless, this device shall be used in such a
manner that the potential for human contact during normal operation is minimized. When nearby
persons has to be kept to ensure RF exposure compliance, in order to comply with RF exposure limits
established in the ANSI C95.1 standards, the distance between the antennas and the user should not
be less than 20 cm.

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WARNING
“CAUTION – Use suitable mounting apparatus to avoid risk of injury.”
“CAUTION – This is a Class A product. In a domestic environment this product may cause radio
interference in which case the user may be required to take adequate measures”
“CAUTION –Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries
according to the instructions.”
“CAUTION - Use a power cord that matches the voltage of the power outlet, which has been approved
and complies with the safety standard of your particular country.”
“WARNING – To avoid risk of electric shock, this equipment must only be connected to a supply
mains with protective earth.”

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Content
1. Getting Started............................................................................................................6
1.1 Safety Precautions ................................................................................................6
1.2 Packing List...........................................................................................................6
1.3 System Specifications ...........................................................................................7
1.4 System Overview.................................................................................................10
1.4.1 Top View.................................................................................................................................... 10
1.4.2 Bottom View............................................................................................................................... 10
1.5 System Dimensions.............................................................................................11
1.5.1 Front and Rear side ................................................................................................................... 11
1.5.2 Installing Extend Brackets.......................................................................................................... 12
1.6 Flush Mounting Concept......................................................................................13
1.7 Panel Mounting....................................................................................................14
1.8 Wall Mounting Concept........................................................................................24
1.9 Wall Mounting......................................................................................................25
2. Hardware Configuration...........................................................................................34
2.2 ACP-RK3288B Overviews ...................................................................................35
2.3 ACP-RK3288B Connector list..............................................................................36
2.4 Ethernet LED behavior.........................................................................................37
2.5 Evaluation Cable Kit (Optional)............................................................................37
2.6 ACP-RK3288B Jumpers & Connectors settings ..................................................38
2.6.1 AT/ATX Input power select (JSATX1)....................................................................................... 38
2.6.2 Touch button board connector (JTB1)....................................................................................... 38
2.6.3 General purpose I/O connector (JGPIO1)................................................................................. 39
2.6.4 RS-485 connector (J485_COM2).............................................................................................. 40
2.6.5 USB Camera connector (JCAM_DMIC1).................................................................................. 40
2.6.6 A-MIC connector (JAMIC1) ....................................................................................................... 41
2.6.7 DC Power-in connector (DCIN2)............................................................................................... 41
2.6.8 Speaker connector (JSPK1)...................................................................................................... 42
2.6.9 I2C connector (JSEN1).............................................................................................................. 42
2.6.10 USB Touch connector (JUTP1)............................................................................................... 43
2.6.11 Debug connector (JDBG1)...................................................................................................... 43
2.6.12 Serial port 1 connector (JCOM1)............................................................................................. 44
2.6.13 RTC Battery connector (JBAT1).............................................................................................. 44
2.6.14 MCU Firmware upgrade connector (JMCU1).......................................................................... 45
2.6.15 Power Button (PWRBTN1)...................................................................................................... 45
2.6.16 LVDS connector (LVDS1)........................................................................................................ 46

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1. Getting Started
1.1 Safety Precautions
Warning!
Always completely disconnect the power cord from your
chassis whenever you work with the hardware. Do not
make connections while the power is on. Sensitive
electronic components can be damaged by sudden power
surges. Only experienced electronics personnel should
open the PC chassis.
Caution!
Always ground yourself to remove any static charge before
touching the CPU card. Modern electronic devices are very
sensitive to static electric charges. As a safety precaution,
use a grounding wrist strap at all times. Place all electronic
components in a static-dissipative surface or static-shielded
bag when they are not in the chassis.
1.2 Packing List
1 x OFT-21WR1 Open Frame Tablet
Power cord / Power adapter (Optional)
Screw M3-4mm x1pc, ziplock bag No.00 40x60mm x1pc

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1.3 System Specifications
Board Specification
Mother Board
ACP-RK3288B
CPU
RockChip RK3288
Memory
2GB DDR3L
Storage
16GB eMMC
Power Supply
DC in
Adapter
60W, 12V power adaptor
Speaker
1 x Speaker interface
Microphone
1 x A-MIC interface
Camera
2 x 5p USB Camera (including DMIC)
Sensor
1 x interface for sensor (light sensor)
G sensor On board
Operating System
Android 8.1
Wifi/BT
1 x AzureWave AW-NB177NF
Wireless 802.11b/g/n WLAN+BT Combo Module
Storage
Other Storage
Device
16G eMMC
Panel & Touch
LCD Panel
21.5” Innolux M215HJJ-L30
1920 x 1080
Touch Screen
21.5” Sense
Touch Controller
EETI 84H5680
Internal I/O Connectors
USB OTG
Micro USB x 1
USB Camera
JCAM1 5P x 2, pitch 2.0mm
USB Touch
JUTP1 5P x 1, pitch 2.0mm
Micro SD
Micro SD x 1
M.2 Socket
M.2 B-Key x 1 (3042) x1
Touch Button
JTB1 6P x 2, pitch 2.0mm
DC in 2
4P x 1 (12 ~ 24V), pitch 2.0mm
eDP
21.5” 1920 x 1080
Analog MIC
JAMIC1 3P x 1, pitch 2.0mm
Speaker
JSPK1 4P x 1, pitch 2.0mm
Sensor
JSEN1 I2C x 2, 5P x 2, pitch 2.0mm
G Sensor
Yes

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Console Debug
JDBG1 3P x 1, pitch 2.0mm
RS232
JCOM1 5P x 1, pitch 2.0mm
RS485
JCOM2 5P x 2, pitch 2.0mm
GPIO
JGPIO1 10P x 2, 16bit, pitch 1.0mm
RTC Battery
JBAT1 2P, pitch 1.25mm
External I/O
DC in Power jack
1 x Power Jack
USB Port
2 x USB Type A Host
Video Port
1 x HDMI
Audio Port
1 x Headphone Jack for Line out
Expansion Slots
1 x Micro SD slot
Reset
1 x Reset
Mechanical
Power Type
12V ~ 24V wide voltage DC input
Power Connector
Type
DC jack
Dimension
501.88 x 296.2 x 44.1 mm
Weight
3.4kg
Color
Metallic
Fanless
Yes
OS Support
Android 8.1
Reliability
EMI Test
CE
FCC class A
Safety
IEC62368-1 & EN62368-1
Random Vibration
Operation
1. PSD: 0.00454G²/Hz, 1.5 Grms
2. Operation mode
3. Test Frequency : 5-500Hz
4. Test Axis : X,Y and Z axis
5. 30 minutes per each axis
6. IEC 60068-2-64 Test:Fh
7. Storage : CF or SSD
Sine Vibration test
(Non-operation)
1 Test Acceleration : 2G
2 System condition: Non-Operating mode
3 Test frequency : 5~500 Hz
4 Sweep：1 Oct/ per one minute. (logarithmic)
5 Test Axis : X,Y and Z axis
6 Test time : 10 min. each axis
Reference IEC 60068-2-6 Testing procedures

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Package vibration
test
1. PSD: 0.026G²/Hz , 2.16 Grms
2. Non-operation mode
3. Test Frequency : 5-500Hz
4. Test Axis : X,Y and Z axis
5. 30 min. per each axis
6. IEC 60068-2-64 Test:Fh
Bump Test
1. Wave form：Half Sine wave
2. Acceleration Rate：10g for operation mode
3. Duration Time：11ms
4. No. of Shock：Z axis 300 times
5. Test Axis: Z axis
6. Operation mode
7. Reference IEC 60068-2-29 Testing procedures
Test Eb : Bump Test
Package Drop test
1 One corner , three edges, six faces
2 ISTA 2A, IEC-60068-2-32 Test:Ed
Operating
Temperature
0°C ~ 40°C
Operating
Humidity
40°C @ 95% Relative Humidity, Non-condensing
Storage
Temperature
-20°C ~ 60°C
Note: Specifications are subject to change without notice.

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1.4 System Overview
1.4.1 Top View
1.4.2 Bottom View
Connectors
Label
Function
Note
SD
Micro SD card slot
Micro USB
Micro USB connector
HP
Audio line-out connector
HDMI
HDMI connector
USB
2 x USB 2.0 connector
LAN
RJ-45 Ethernet
Reset
Reset button
DCIN
DC power-in connector

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1.5 System Dimensions
1.5.1 Front and Rear side
(Unit: mm)

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1.5.2 Installing Extend Brackets
Step1. Locate brackets on both sides, matching the holes on the monitor.
Step2. Insert and fasten 14 screws on each side of the monitor to secure extending brackets.
Step3. Fasten 4 screws to secure PCB & Shielding cover on the OFT-21WR1 bracket.
Note: Brackets sold separately.
4
Screw
14
3
Extending Bracket Bottom
1
2
Extending Bracket TOP
1
1
Extending Bracket RL
2
Item
Part Name
Quantity
1
2
3
4
5

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1.6 Flush Mounting Concept

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1.7 Panel Mounting
(Installation
surface)
(Opening dimension)
(Opening dimension) (Opening dimension)
A
A
(Panel thickness)
(Unit: mm)

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Step1. Insert and fasten 4 screws to secure Bracket R/L.
3
Screw
4
2
Bracket-RL
2
1
21_ASSY
1
Item
Part Name
Quantity
12
3

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Step2-1. Locate brackets on both sides, matching the holes on the monitor.
Step2-2. Insert and fasten 10 screws on each side of the monitor to secure Mounting brackets.
4
Hexagon Stud
10
1
21_ASSY
1
Item
Part Name
Quantity

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5
3
Step3. Insert and fasten 10 screws on each side of the monitor to secure Front bracket.
5
Front Bracket
1
3
Screw
10
Item
Part Name
Quantity

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3
6
Step4. Insert and fasten 16 screws to secure Bracket.
3
Screw
16
6
Panel Mount Bracket
6
Item
Part Name
Quantity

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7
(Outside of the wall)
Step5. Insert OFT-21WR1 into the wall.
7
Wall
1
Item
Part Name
Quantity

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6
89
(Inside of the wall)
Step6. Fasten 12 screws to secure Panel mount brackets and insert it into Bracket.
6-1
9
Panel mount Screw
12
8
Panel Mount Kit Bracket
12
6
Panel Mount Bracket
6
Item
Part Name
Quantity