Dell Thunderbolt Dock WD22TB4 User manual

Dell Thunderbolt Dock
WD22TB4
User Guide
Regulatory Model: K20A
Regulatory Type: K20A001
January 2022
Rev. A00

Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid
the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
© 2022 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other
trademarks may be trademarks of their respective owners.

Chapter 1: Introduction................................................................................................................. 4
Chapter 2: What's in the box......................................................................................................... 5
Chapter 3: Hardware requirements................................................................................................6
Chapter 4: Views of Dell Thunderbolt Dock - WD22TB4................................................................. 7
Top.......................................................................................................................................................................................... 7
Front....................................................................................................................................................................................... 7
Right........................................................................................................................................................................................7
Back........................................................................................................................................................................................ 8
Bottom................................................................................................................................................................................... 8
Chapter 5: Important Information................................................................................................. 9
Chapter 6: Setting up your docking station..................................................................................10
Chapter 7: Setup of External Monitors......................................................................................... 12
Configuring your Monitors............................................................................................................................................... 12
Display bandwidth.............................................................................................................................................................. 13
Display Resolution Table...................................................................................................................................................14
Chapter 8: Replacing the USB Type-C cable module.....................................................................17
Upgrading your WD19 docks........................................................................................................................................... 21
Chapter 9: Technical specifications............................................................................................. 23
Product specifications......................................................................................................................................................23
Power adapter specifications......................................................................................................................................... 24
Port disablement .............................................................................................................................................................. 25
LED Status Indicators.................................................................................................................................................. 27
Power Adapter LED................................................................................................................................................. 27
Docking Status Indicator...................................................................................................................................... 28
Dell ExpressCharge and ExpressCharge Boost overview........................................................................................28
Docking specifications......................................................................................................................................................28
Chapter 10: Dell docking station firmware update .......................................................................30
Chapter 11: Frequently asked questions....................................................................................... 33
Chapter 12: Troubleshooting the Dell Thunderbolt Dock - WD22TB4............................................ 34
Symptoms and solutions..................................................................................................................................................34
Chapter 13: Getting help and contacting Dell...............................................................................38
Contents
Contents 3

Introduction
The Dell Thunderbolt Dock - WD22TB4 is a device that links all your electronic devices to your system using a Thunderbolt
4 (Type-C) cable interface. Connecting the system to the docking station allows you to easily connect multiple peripherals
(mouse, keyboard, stereo speakers, external hard-drives, and high-resolution displays) without having to plug each one into the
system.
CAUTION: Update your system’s BIOS, graphic drivers and the Dell Thunderbolt Dock drivers to the latest
versions available at www.dell.com/support BEFORE using the docking station. Older BIOS versions and drivers
could result in your system not recognizing the docking station or not functioning optimally. Always check if any
recommended firmware is available for your docking station at www.dell.com/support.
1
4 Introduction

What's in the box
Your docking station ships with the components shown below:
1. Docking station
2. Power adapter and power cord
3. Documentation (Quick Start Guide, Safety, Environmental, and Regulatory Information
NOTE: Contact Dell support if any of the listed items are missing from your box.
2
What's in the box 5

Hardware requirements
Before using the docking station, ensure that your system has a USB Type-C with DisplayPort Alt Mode (supported) or
Thunderbolt port (recommended) over USB Type-C that is designed to support the docking station.
3
6 Hardware requirements

Views of Dell Thunderbolt Dock - WD22TB4
Topics:
•Top
•Front
•Right
•Back
•Bottom
Top
1. Sleep/Wake up/Power button
NOTE: The dock button is designed to replicate your system's power button. If you connect the Dell Thunderbolt Dock
WD22TB4 to supported Dell computers, the dock button works like your computer's power button and you can use it to
power on/sleep/force shutdown the computer.
NOTE: The dock button is only operational when connected to supported Dell computers.
Front
1. USB 3.2 Gen 2 Type-C port
2. USB 3.2 Gen 1 port with PowerShare
Right
1. Wedge-shaped lock slot
2. Kensington security-cable slot
4
Views of Dell Thunderbolt Dock - WD22TB4 7

Back
1. DisplayPort 1.4 ports
2. HDMI 2.0 port
3. USB 3.2 Gen 2 Type-C port with DisplayPort 1.4 Alt Mode
4. USB 3.2 Gen 1 ports
5. Network connector (RJ-45)
6. Power connector
7. Thunderbolt 4 ports
Bottom
1. Service tag label
8Views of Dell Thunderbolt Dock - WD22TB4

Important Information
Updating drivers on your system
It is recommended to update the following drivers on your system before using the docking station:
1. System BIOS
2. Graphics driver
3. Thunderbolt driver and Thunderbolt firmware
4. Ethernet driver
CAUTION: Older BIOS versions and drivers could result in the docking station not being recognized by your
system or not functioning optimally.
For Dell systems, you can visit www.dell.com/support and enter the Service Tag or Express Service Code to find all relevant
drivers. For more information on how to find the Service Tag for your computer, see Locate the Service Tag on your computer.
For non-Dell systems, please visit the respective manufacturers support page to find the latest drivers.
Updating the Dell Thunderbolt Dock - WD22TB4 driver set
To ensure that the Dock functions correctly, it is recommends installing the latest firmware available for the WD22TB4.
All available drivers can be found on www.dell.com/support.
Drivers and Downloads FAQ
When troubleshooting, downloading or installing drivers it is recommended that you read the Dell Knowledge Based article,
Drivers and Downloads FAQ 000123347.
5
Important Information 9

Setting up your docking station
Steps
1. Update your system's BIOS, graphics, thunderbolt and network drivers from www.dell.com/support/drivers.
NOTE: Thunderbolt driver updates are only for systems that are natively configured with Thunderbolt hardware and is
not applicable for Non-thunderbolt systems.
CAUTION: Ensure that the system is connected to a power source while installing the BIOS and drivers.
2. Connect the AC adapter to a power outlet. Then, connect the AC adapter to the 7.4 mm DC-in power input on the Dell
Thunderbolt Dock - WD22TB4.
3. Connect the USB Type-C connector to the system.
Update the Dell Thunderbolt Dock firmware from www.dell.com/support/drivers.
4. Connect multiple displays to the docking station, as needed.
6
10 Setting up your docking station

The above table shows the different video port combinations available to connect multiple displays to the Dell WD22TB4
dock. For more details on supported display resolutions, please see Display Resolution.
Setting up your docking station 11

Setup of External Monitors
Topics:
•Configuring your Monitors
•Display bandwidth
•Display Resolution Table
Configuring your Monitors
If connecting two displays, follow these steps:
Steps
1. Click the Start button, and then select Settings.
2. Click System and select Display.
7
12 Setup of External Monitors

3. Under the Multiplay displays section, modify the display configuration as needed.
NOTE: The display topology can be configured, by moving around the displays in the "Select and rearrange displays"
section, to change where the operating system assumes these monitors are located.
Display bandwidth
External monitors require a certain amount of bandwidth to work properly. Monitors with higher resolution require more
bandwidth.
●DisplayPort High Bit Rate 2 (HBR2) is 5.4 Gbps maximum link rate per lane. With DP overhead, the effective data rate is 4.3
Gbps per lane.
●DisplayPort High Bit Rate 3 (HBR3) is 8.1 Gbps maximum link rate per lane. With DP overhead, the effective data rate is 6.5
Gbps per lane.
Table 1. Display bandwidth
Resolution Minimum bandwidth required
1 x FHD (1920 x 1080) display @60 Hz 3.2 Gbps
1 x QHD (2560 x 1440) display @60 Hz 5.6 Gbps
1 x 4K (3840 x 2160) display @30 Hz 6.2 Gbps
1 x 4K (3840 x 2160) display @60 Hz 12.5 Gbps
Setup of External Monitors 13

Display Resolution Table
WD22TB4 for Non-Thunderbolt systems
Table 2. WD22TB4 for Non-Thunderbolt systems
Display Port
Available
Bandwidth
Single Display
(maximum
resolution)
Dual Display
(maximum
resolution)
Triple Display (maximum
resolution)
Quad Display (maximum
resolution)
HBR2 (HBR2 x2
lanes - 8.6 Gbps)
DP 1.4/HDMI 2.0/
MFDP Type-C/TBT
Type-C: 4K (3840 x
2160) @30 Hz
●DP 1.4 + DP
1.4: FHD (1920 x
1080) @60 Hz
●DP 1.4 + HDMI
2.0: FHD (1920 x
1080) @60 Hz
●DP 1.4 + MFDP
Type-C: FHD
(1920 x 1080)
@60 Hz
●DP 1.4 + DP 1.4 + HDMI
2.0:
○1 x FHD (1920 x
1080) @60 Hz
○2 x HD (1280 x 720)
@60 Hz
●DP 1.4 + DP 1.4 +
MFDP Type-C:
○1 x FHD (1920 x
1080) @60 Hz
○2 x HD (1280 x 720)
@60 Hz
NA
HBR3 (HBR3 x2
lanes - 12.9 Gbps)
DP 1.4/HDMI 2.0/
MFDP Type-C/TBT
Type-C: 4K (3840 x
2160) @30 Hz
●DP 1.4 + DP
1.4: QHD (2560 x
1440) @60 Hz
●DP 1.4 + HDMI
2.0: QHD (2560 x
1440) @60 Hz
●DP 1.4 + MFDP
Type-C: QHD
(2560 x 1440)
@60 Hz
●DP 1.4 + DP 1.4 + HDMI
2.0: FHD (1920 x 1080)
@60 Hz
●DP 1.4 + DP 1.4 +
MFPD Type-C: FHD
(1920 x 1080) @60 Hz
●DP 1.4 + DP 1.4 + HDMI
2.0:
○4 x SXGA (1280 x
1024) @60 Hz**
●DP 1.4 + DP 1.4 +
MFDP Type-C:
○4 x SXGA (1280 x
1024) @60 Hz **
HBR3 with DSC
(Display Stream
Compression)
DP 1.4/HDMI 2.0/
MFDP Type-C: 4K
(3840 x 2160) @60
Hz
OR
TBT Type-C 4K
(3840 x 2160) @30
Hz
●DP 1.4 + DP
1.4: QHD (2560 x
1440) @60 Hz
●DP 1.4 + HDMI
2.0: QHD (2560 x
1440) @60 Hz
●DP 1.4 + MFDP
Type-C: QHD
(2560 x 1440)
@60 Hz
●DP 1.4 + DP 1.4 + HDMI
2.0: QHD (2560 x 1440)
@60 Hz
●DP 1.4 + DP 1.4 +
MFPD Type-C: QHD
(2560 x 1440) @60 Hz
●DP 1.4 + DP 1.4 + HDMI
2.0:
○3 x QHD (2560 x
1440) @60 Hz + 1 x
HD (1280 x 720) @
60 Hz **
●DP 1.4 + DP 1.4 +
MFDP Type-C:
○3 x QHD (2560 x
1440) @60 Hz + 1 x
HD (1280 x 720) @
60 Hz **
**Fourth display must be daisy chained through one of the monitors connected to DP 1.4 ports.
WD22TB4 for Thunderbolt systems
Table 3. WD22TB4 for Thunderbolt systems
Display Port
Available
Bandwidth
Single Display
(maximum
resolution)
Dual Display
(maximum
resolution)
Triple Display (maximum
resolution)
Quad Display (maximum
resolution)
HBR2 (HBR2 x8
lanes - 34.5 Gbps)
DP1.4 /HDMI 2.0/
MFDP Type-C/USB
●DP 1.4 + DP
1.4: QHD (2560 x
1440) @60 Hz
●DP 1.4 + DP 1.4 + HDMI
2.0: 2 x QHD (2560 x
NA
14 Setup of External Monitors

Table 3. WD22TB4 for Thunderbolt systems (continued)
Display Port
Available
Bandwidth
Single Display
(maximum
resolution)
Dual Display
(maximum
resolution)
Triple Display (maximum
resolution)
Quad Display (maximum
resolution)
Type-C TB: 4K (3840
x 2160) @60 Hz
●DP 1.4 + HDMI
2.0: QHD (2560 x
1440) @60 Hz
●DP 1.4 + MFDP
Type-C: QHD
(2560 x 1440)
@60 Hz
●DP 1.4 + TBT
Type-C: 4K (3840
x 2160) @60 Hz
●HDMI 2.0 + TBT
Type-C: 4K (3840
x 2160) @60 Hz
●MFDP Type-C +
TBT Type-C: 4K
(3840 x 2160)
@60 Hz
1440) @60 Hz + 1 x
FHD (1920 x 1080)
●DP 1.4 + DP 1.4 +
MFDP Type-C: 2 x QHD
(2560 x 1440) @60 Hz
1 x FHD (1920 x 1080
●DP 1.4 + DP 1.4 +
TBT Type-C : 3 x QHD
(2560 x 1440) @60 Hz
●DP 1.4 + MFDP Type-C
+ TBT Type-C: 3 x QHD
(2560 x 1440) @60 Hz
●DP 1.4 + HDMI 2.0 +
TBT Type-C: 3 x QHD
(2560 x 1440) @60 Hz
HBR3 (HBR3 x4
lanes + HBR3 x1 -
32.4 Gbps)
DP 1.4/HDMI
2.0/MFDP Type-
C/TBT Type-C: 4K
(3840x4320) @60Hz
●DP 1.4 + DP 1.4:
4K (3840 x 2160)
@60 Hz
●DP 1.4 + HDMI
2.0: 4K (3840 x
2160) @60 Hz
●DP 1.4 + MFDP
Type-C: 4K (3840
x 2160) @60 Hz
●DP 1.4 + TBT
Type-C:
○1 x 4K (3840 x
2160) @60 Hz
○1 x QHD
(2560 x 1440)
@60 Hz
●HDMI 2.0 + TBT
Type-C:
○1 x 4K (3840 x
2160) @60 Hz
○1 x QHD
(2560 x 1440)
@60 Hz
●MFDP Type-C +
TBT Type-C:
○1 x 4K (3840 x
2160) @60 Hz
○1 x QHD
(2560 x 1440)
@60 Hz
●DP 1.4 + DP 1.4 + HDMI
2.0:
○1 x 4K (3840 x
2160) @60 Hz
○2 x QHD (2560 x
1440) @60 Hz
●DP 1.4 + DP 1.4 +
MFDP Type-C:
○1 x 4K (3840 x
2160) @60 Hz
○2 x QHD (2560 x
1440) @60 Hz
●DP 1.4 + DP 1.4 + TBT
Type-C:
○2 x 4K (3840 x
2160) @60 Hz
○1 x QHD (2560 x
1440) @60 Hz
●DP 1.4 + MFDP Type-C
+ TBT Type-C:
○2 x 4K (3840 x
2160) @60 Hz
○1 x QHD (2560 x
1440) @60 Hz
●DP 1.4 + HDMI 2.0 +
TBT Type-C:
○2 x 4K (3840 x
2160) @60 Hz
○1 x QHD (2560 x
1440) @60 Hz
●DP 1.4 + DP 1.4 +
HDMI 2.0 + TBT Type-
C: QHD (2560 x 1440)
@60 Hz
●DP 1.4 + DP 1.4 +
MFDP Type-C + TBT
Type-C: QHD (2560 x
1440) @60 Hz
HBR3 with DSC
(Display Stream
Compression)
DP 1.4/HDMI
2.0/MFDP Type-
C/TBT Type-C: 4K
(3840x4320) @60Hz
●DP 1.4 + DP 1.4:
4K (3840 x 2160)
@60 Hz
●DP 1.4 + HDMI
2.0: 4K (3840 x
2160) @60 Hz
●DP 1.4 + DP 1.4 + HDMI
2.0:
○3 x 4K (3840 x
2160) @60 Hz
●DP 1.4 + DP 1.4 +
MFDP Type-C:
●DP 1.4 + DP 1.4 + HDMI
2.0 + TBT Type-C:
3 x 4K (3840 x 2160)
@60 Hz + 1 x QHD
(2560 x 1440) @60 Hz
OR
Setup of External Monitors 15

Table 3. WD22TB4 for Thunderbolt systems (continued)
Display Port
Available
Bandwidth
Single Display
(maximum
resolution)
Dual Display
(maximum
resolution)
Triple Display (maximum
resolution)
Quad Display (maximum
resolution)
●DP 1.4 + MFDP
Type-C: 4K (3840
x 2160) @60 Hz
●DP 1.4 + TBT
Type-C:
○1 x 4K (3840 x
2160) @60 Hz
○1 x QHD
(2560 x 1440)
@60 Hz
●HDMI 2.0 + TBT
Type-C:
○1 x 4K (3840 x
2160) @60 Hz
○1 x QHD
(2560 x 1440)
@60 Hz
●MFDP Type-C +
TBT Type-C:
○1 x 4K (3840 x
2160) @60 Hz
○1 x QHD
(2560 x 1440)
@60 Hz
○3 x 4K (3840 x
2160) @60 Hz
●DP 1.4 + DP 1.4 + TBT
Type-C:
○2 x 4K (3840 x
2160) @60 Hz
○1 x QHD (2560 x
1440) @60 Hz
●DP 1.4 + MFDP Type-C
+ TBT Type-C:
○2 x 4K (3840 x
2160) @60 Hz
○1 x QHD (2560 x
1440) @60 Hz
●DP 1.4 + HDMI 2.0 +
TBT Type-C:
○2 x 4K (3840 x
2160) @60 Hz
○1 x QHD (2560 x
1440) @60 Hz
3 x 4K (3840 x 2160)
@60 Hz + 1 x 4K (3840
x 2160) @30 Hz
●DP 1.4 + DP 1.4 +
MFDP Type-C + TBT
Type-C:
3 x 4K (3840 x 2160)
@60 Hz + 1 x QHD
(2560 x 1440) @60 Hz
OR
3 x 4K (3840 x 2160)
@60 Hz + 1 x 4K (3840
x 2160) @30 Hz
Port disablement
Table 4. Port disablement
Ports connected to display Ports disabled
●Two DisplayPort 1.4 ports (rear)
●One HDMI 2.0 port (rear)
●One Thunderbolt 4 port (rear)
Second Thunderbolt 4 Type-C port supports data only (rear)
Two Thunderbolt 4 Type-C port (rear) ●Two DisplayPort 1.4 ports (rear)
●One HDMI 2.0 port (rear)
●One USB 3.2 Gen 2 Type-C port with DisplayPort 1.4 Alt
Mode
Important
NOTE: HDMI 2.0 and MFDP (Multi-Function DisplayPort) Type-C ports on the back of are toggled. HDMI 2.0 and MFDP
Type-C cannot support dual monitors simultaneously. Only one of these ports can be used at a time.
NOTE: If higher resolution monitors are used, the Graphics driver makes a judgment based on monitor specifications and
display configurations. Some resolutions may not be supported and so will be removed from the Windows Display Control
Panel.
NOTE: Linux operating system is unable to physically turn-off built-in display, the external display numbers will be one less
than the display numbers listed in above tables.
NOTE: Resolution support is also dependent on the monitor’s Extended Display Identification Data (EDID) resolution.
16 Setup of External Monitors

Replacing the USB Type-C cable module
Prerequisites
The Dell Thunderbolt Dock - WD22TB4 ships with a serviceable cable module. The USB Type-C cable module on the docking
station can be removed and replaced by following these steps:
Steps
1. Turn over the docking station.
8
Replacing the USB Type-C cable module 17

2. Remove the two (M2.5 x 5) screws from the bottom plate of the docking station.
18 Replacing the USB Type-C cable module

3. Using a plastic scribe, gently pull the cable module away from the docking station.
Replacing the USB Type-C cable module 19

4. Gently wiggle and remove the USB Type-C cable module from its connector on the docking station.
5. Take the replacement cable module out of its packaging.
6. Align and place the cable module on to the docking station.
7. Slide and push the cable module to connect the cable module to the connectors on the docking station.
8. Replace the two (M2.5 x 5) screws to the bottom plate of the docking station.
20 Replacing the USB Type-C cable module