Beckhoff C6920 User manual

Manual | EN
C6920
Industrial PC
2023-10-10 | Version: 4.0

Table of contents
C6920 3Version: 4.0
Table of contents
1 Notes on the documentation....................................................................................................................5
2 For your safety ..........................................................................................................................................6
2.1 Signal words......................................................................................................................................6
2.2 Intended use .....................................................................................................................................6
2.3 Fundamental safety instructions .......................................................................................................7
2.4 Operator's obligation to exercise diligence........................................................................................7
2.5 Notes on information security............................................................................................................8
3 Product overview ......................................................................................................................................9
3.1 Structure..........................................................................................................................................10
3.2 Interface description........................................................................................................................11
3.2.1 Power supply.................................................................................................................... 11
3.2.2 Ethernet RJ45 ..................................................................................................................12
3.2.3 USB.................................................................................................................................. 13
3.2.4 DVI ...................................................................................................................................14
3.2.5 RS232 ..............................................................................................................................14
3.3 Optional interfaces ..........................................................................................................................15
3.4 Status LEDs ....................................................................................................................................17
3.5 Name plate......................................................................................................................................18
4 Commissioning .......................................................................................................................................20
4.1 Transport and unpacking ................................................................................................................20
4.2 Installation in the control cabinet.....................................................................................................21
4.2.1 Dimensions ......................................................................................................................22
4.2.2 Installation in the control cabinet...................................................................................... 24
4.3 Connecting the Industrial PC ..........................................................................................................26
4.3.1 Installing the supply cable ................................................................................................ 27
4.3.2 Grounding of the Industrial PC......................................................................................... 28
4.3.3 Connecting cables and power supply .............................................................................. 29
4.4 Switching the Industrial PC on and off ............................................................................................31
5 Beckhoff Device Manager ......................................................................................................................33
6 Decommissioning ...................................................................................................................................35
6.1 Disconnecting the power supply and cables ...................................................................................35
6.2 Disassembly and disposal...............................................................................................................36
7 Maintenance ............................................................................................................................................38
7.1 Cleaning ..........................................................................................................................................38
7.2 Maintenance....................................................................................................................................39
7.2.1 Access to device components.......................................................................................... 41
7.2.2 Replacing the battery .......................................................................................................42
7.2.3 Replacing the storage media ........................................................................................... 43
7.2.4 Replacing the fan .............................................................................................................45
8 Troubleshooting......................................................................................................................................46
9 Technical data .........................................................................................................................................47
10 Appendix..................................................................................................................................................48

Table of contents
C69204 Version: 4.0
10.1 Service and support ........................................................................................................................48
10.2 Approvals ........................................................................................................................................49

Notes on the documentation
C6920 5Version: 4.0
1 Notes on the documentation
This description is only intended for the use of trained specialists in control and automation engineering who
are familiar with the applicable national standards.
The following instructions and explanations must be followed during installation and commissioning of the
components. The responsible staff must ensure that the application or use of the products described satisfy
all the requirements for safety, including all the relevant laws, regulations, guidelines and standards.
Disclaimer
The documentation has been prepared with care. The products described are, however, constantly under
development. For that reason the documentation is not in every case checked for consistency with
performance data, standards or other characteristics. In the event that it contains technical or editorial errors,
we retain the right to make alterations at any time and without warning. No claims for the modification of
products that have already been supplied may be made on the basis of the data, diagrams, and descriptions
in this documentation. All illustrations shown are only examples. The configurations depicted may deviate
from the standard.
Trademarks
Beckhoff®, TwinCAT®, TwinCAT/BSD®, TC/BSD ®, EtherCAT®, EtherCAT G®, EtherCAT G10®, EtherCAT P®,
Safety over EtherCAT®, TwinSAFE®, XFC®, XTS® and XPlanar® are registered and licensed trademarks of
Beckhoff Automation GmbH.
Other designations used in this publication may be trademarks whose use by third parties for their own
purposes could violate the rights of the owners.
Patents
The EtherCAT Technology is covered, including but not limited to the following patent applications and
patents: EP1590927, EP1789857, EP1456722, EP2137893, DE102015105702 and similar applications and
registrations in several other countries.
Copyright
© Beckhoff Automation GmbH & Co. KG. Publication of this document on websites other than ours is
prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the
grant of a patent, utility model or design.
Delivery state
All the components are supplied in particular hardware and software configurations appropriate for the
application. Changes to the hardware or software configuration are permitted, provided they are within the
specified limits for power consumption and power loss (please refer to the respective data sheet).
Currentness
Please check whether you are using the current and valid version of this document. The current version is
always available for download from the Beckhoff website. In case of doubt, contact Technical Support.
Delivery conditions
In addition, the general delivery conditions of the company Beckhoff Automation GmbH & Co. KG apply.

For your safety
C69206 Version: 4.0
2 For your safety
The signal words and their meanings are explained in the chapter on safety. They contain fundamental
safety instructions that are essential for the avoidance of personal injuries and damage to property.
Exclusion of liability
Beckhoff shall not be liable in the event of non-compliance with this documentation and thus the use of the
devices outside the documented operating conditions.
2.1 Signal words
The signal words used in the documentation are classified below.
Warning of personal injuries
DANGER
Hazard with high risk of death or serious injury.
WARNING
Hazard with medium risk of death or serious injury.
CAUTION
There is a low-risk hazard that can result in minor injury.
Warning of property and environmental damage
NOTICE
There is a possibility of damage to the environment, equipment or data.
2.2 Intended use
The the Industrial PC is intended for use as a control system for automation, visualization and
communication in machine and system engineering.
The device has been developed for an IP20 working environment. This involves finger protection and
protection against solid foreign objects up to 12.5 mm. There is no protection against water. Operation of the
devices in wet and dusty environments is not permitted.
The specified limits for technical data must be adhered to.
The device can be used within the documented operating conditions.
Improper use
Do not use the device outside the documented operating conditions.

For your safety
C6920 7Version: 4.0
2.3 Fundamental safety instructions
The following safety instructions must be observed when handling the the Industrial PC.
Application conditions
• Do not use the device under extreme environmental conditions.
• Only use the device in hazardous areas if it is explicitly designed for this purpose.
• Do not carry out any work on the device while it is live. Always switch off the supply voltage for the
device before mounting it, replacing device components or rectifying malfunctions. This does not apply
to the replacement of hard disks in a RAID configuration.
• Never plug or unplug connectors during thunderstorms. There is a risk of electric shock.
• Ensure that the device has a protective and functional earth connection.
Damage to property, loss of data and impairment of functions
• If you change the hardware and software configurations, you must keep within the specified limits of
power consumption and power loss (please refer to the respective data sheet).
• Ensure that only trained specialists with a control and automation engineering background, operate the
device. Use by unauthorized persons can lead to damage to property and loss of data.
• In the case of a 24 V DC power supply unit, fuse the power supply line according to its cross-section to
protect the supply line in the event of a short circuit.
• In case of fire, extinguish the device with powder or nitrogen.
2.4 Operator's obligation to exercise diligence
The operator must ensure that
• the products are used only for their intended purpose (see Chapter 2.2 Intended use [}6]).
• the products are only operated in sound condition and in working order.
• the products are operated only by suitably qualified and authorized personnel.
• the personnel is instructed regularly about relevant occupational safety and environmental protection
aspects, and is familiar with the operating instructions and in particular the safety instructions contained
herein.
• the operating instructions are in good condition and complete, and always available for reference at the
location where the products are used.

For your safety
C69208 Version: 4.0
2.5 Notes on information security
The products of Beckhoff Automation GmbH & Co. KG (Beckhoff), insofar as they can be accessed online,
are equipped with security functions that support the secure operation of plants, systems, machines and
networks. Despite the security functions, the creation, implementation and constant updating of a holistic
security concept for the operation are necessary to protect the respective plant, system, machine and
networks against cyber threats. The products sold by Beckhoff are only part of the overall security concept.
The customer is responsible for preventing unauthorized access by third parties to its equipment, systems,
machines and networks. The latter should be connected to the corporate network or the Internet only if
appropriate protective measures have been set up.
In addition, the recommendations from Beckhoff regarding appropriate protective measures should be
observed. Further information regarding information security and industrial security can be found in our
https://www.beckhoff.com/secguide.
Beckhoff products and solutions undergo continuous further development. This also applies to security
functions. In light of this continuous further development, Beckhoff expressly recommends that the products
are kept up to date at all times and that updates are installed for the products once they have been made
available. Using outdated or unsupported product versions can increase the risk of cyber threats.
To stay informed about information security for Beckhoff products, subscribe to the RSS feed at https://
www.beckhoff.com/secinfo.

Product overview
C6920 9Version: 4.0
3 Product overview
The C6920 Industrial PC belongs to the series of compact Industrial PCs for space-saving control cabinet
installation. The device is suitable for various applications and requirements.
Thanks to the available processors, the Industrial PC can be used for the following applications, among
others:
• diverse automation and visualization tasks
• wide range of IoT tasks with data preprocessing
• complicated HMI applications
• extensive axis controllers
• short cycle times
• high-volume data handling
The basic configuration of the C6920 includes the following aspects:
• Intel® processor
• 1 DVI connection, graphic adapter integrated in the Intel® processor
• 2 x 100/1000BASE-T connections, on-board dual Ethernet adapter
• Hard disk
• 4 x USB
• 1 x RS232

Product overview
C692010 Version: 4.0
3.1 Structure
1
2
3
4
5
6
7
8
9
10
11
Fig.1: C6920_structure
Table1: Key: C6920 structure
No. Component Description
1 Mounting plate Plate for mounting the Industrial PC by its the rear side in the
control cabinet
2 Status LEDs Status display for power, TwinCAT, hard disk, fan, User LED,
fieldbus activity, fieldbus error
3 Name plate Information on the equipment of the Industrial PC
4 Front flap Access to battery and storage media
5 Grounding screw Functional earthing of the Industrial PC
6 Fan cartridge tool-less access with knurled screw
7 RS232 interface (X109) Serial interface according to RS232 standard
8 DVI interface (X108) Connection of a DVI-capable monitor
9 USB interfaces (X104 - X107) Connection of peripheral devices
10 RJ45 Ethernet interfaces (X102,
X103)
Connection of the Industrial PC to a 100/1000BASE-T
network or EtherCAT
11 Power supply (X101) Connection of the power supply, protective earth and external
wiring

Product overview
C6920 11Version: 4.0
3.2 Interface description
The basic version of the C6920 has the following interfaces:
• Power supply (X101)
• Ethernet RJ45 (X102, X103)
• USB (X104 - X107)
• DVI (X108)
• RS232 (X109)
3.2.1 Power supply
The industrial PC is supplied with a nominal voltage of 24V. The 8-pin voltage socket (X101) is used for
connection to the power supply and the external wiring of the industrial PC. The main supply voltage is
applied between PIN 5 (-24V) and PIN 6 (+24V) of the socket. If the industrial PC is equipped with an
integrated uninterruptible power supply (UPS), an external battery pack can additionally be connected to PIN
1 and PIN 2.
X101
8
1
P-S
PC-ON
+
-
24V
24V UPS
+
-BAT
C9900 U330
only
Fig.2: C6920_voltage socket pin numbering
Table2: Voltage socket pin assignment
Pin Signal Description
8 P-S Power Status output, minus is the negative pole of the supply voltage
7 PC-ON Input PC-ON
6 + 24V 24V supply voltage, positive pole
5 - 24V supply voltage, negative pole
4 Protective earth
3 24 V UPS 24 V UPS output 2.5 A, minus is – BAT
2 + BAT Positive pole of the battery pack
1 - BAT Negative pole of the battery pack
To operate the buffered 24V output, you must use PIN 1 (-) and PIN 3 (+).
The plug for the power supply is specified for 8A and can accommodate wire cross-sections of up to
1.5mm2. For long supply lines, use 1.5 mm2 cables to achieve a low voltage drop on the supply lines. There
should be at least 22 V at the power supply plug of the industrial PC, so that the industrial PC remains
switched on during voltage fluctuations. The plug is included in the delivery. You can obtain a replacement
plug from your Beckhoff Sales using the following ordering option:
• C9900-P926: power supply connector for Industrial PC C69xx, 8-pin connector with strain relief for the
external power supply cables

Product overview
C692012 Version: 4.0
3.2.2 Ethernet RJ45
The C6920 has two Gigabit LAN ports (X102, X103). The 100Base-T and 1000Base-T Ethernet standards
enable the connection of corresponding network components and data rates of 100/1000 Mbit/s. The
required speed is selected automatically.
The RJ45 connection technology with twisted-pair cables is used. The maximum length of the cable
connection is 100 m.
The controllers are used as follows, based on the device generations:
Table3: Controller classification based on device generations
Generation Controller
C6920-0060 Intel® i219 for LAN1 and i210 for LAN2
C6920-0070 Intel® i219 for LAN1 and i210 for LAN2
C6920-0080 Intel® i219 for LAN1 and i225 for LAN2
The Ethernet port i210/i225 connected via PCIe is usually suitable for cycle times <= 1ms and for distributed
clock applications with EtherCAT.
The Ethernet port i219 integrated in the chipset is usually suitable for real-time Ethernet applications with
cycle times >1ms (without distributed clocks).
X102
X103
8
1
1
8
LAN1
LAN2
Fig.3: C6920_Ethernet interface pin numbering
Table4: Ethernet interface pin assignment
Pin Signal Description
1 T2 + Pair 2
2 T2 -
3 T3 + Pair 3
4 T1 + Pair 1
5 T1 -
6 T3 - Pair 3
7 T4 + Pair 4
8 T4 -
The LEDs of the LAN interfaces indicate the activity and the speed of the data transfer (Mbit/s). The top LED
indicates whether the interface is connected to a network. If this is the case, the LED lights up green. The
LED flashes when data transfer is in progress.
The lower LED indicates the speed of the data transfer. If the speed is 100 Mbit/s the LED is orange, at 1000
Mbit/s it is green

Product overview
C6920 13Version: 4.0
3.2.3 USB
The Industrial PC has four USB interfaces (X104-X107). They are used to connect peripheral devices with
USB interfaces. The following table shows the interface assignment based on the device generation:
Table5: USB interfaces based on device generation
Generation USB interfaces
C6920-0060 4x USB 3.0
C6920-0070 4x USB 3.0
C6920-0080 4x USB 3.0
1
2
3
4 4
3
2
1
5
6
7
8
9
5
6
7
8
9
1
2
3
4 4
3
2
1
5
6
7
8
9
5
6
7
8
9
4
3
21
X104-107
Fig.4: C6920_USB interface pin numbering
Table6: USB interface pin assignment
Pin Connection
1 Vbus
2 D -
3 D +
4 GND
5 StdA_SSRX -
6 StdA_SSRX +
7 GND_DRAIN
8 StdA_SSTX -
9 StdA_SSTX +
For USB 2.0 only the first four pin assignments are relevant.

Product overview
C692014 Version: 4.0
3.2.4 DVI
The industrial PC has a DVI connection (X108), to which a DVI-capable monitor can be connected. Only
digital signals are transmitted.
8
1
24
17
9
16
X108
Fig.5: C6920_DVI interface
Table7: DVI interface pin assignment
Pin Connection Pin Connection Pin Connection
1 TMDS Data 2 + 9 TMDS Data 1 - 17 TMDS Data 0 -
2 TMDS Data 2 + 10 TMDS Data 1 + 18 TMDS Data 0 +
3 TMDS Data 2/4 Shield 11 TMDS Data 1/3 Shield 19 TMDS Data 0/5 Shield
4 not connected 12 not connected 20 not connected
5 not connected 13 not connected 21 not connected
6 DDC Clock 14 + 5 V Power 22 TMDS Clock Shield
7 DDC Data 15 Ground (+ 5 V, Analog H/
V Sync)
23 TMDS Clock +
8 Analog Vertical Sync 16 Hot Plug Detect 24 TMDA Clock -
3.2.5 RS232
The serial interface (X109) is fed out via a 9-pin standard DSUB connector. The signals comply with the
RS232 standard. The port address and the interrupt used are set with the help of the BIOS setup.
X109
1
5
6
9
Fig.6: C6920_RS232 interface pin numbering
Table8: RS232 pin assignment
Pin Signal Description
1 DCD Data Carrier Detect
2 RxD Receive Data
3 TxD Transmit Data
4 DTR Data Terminal Ready
5 GND Ground
6 DSR Data Set Ready
7 RTS Request to Send
8 CTS Clear to Send
9 RI Ring Indicator

Product overview
C6920 15Version: 4.0
3.3 Optional interfaces
A variety of interface options are available to you for extending your Industrial PC beyond the basic
equipment level with additional interfaces. The following table provides information about the available
interfaces, depending on the device generation:
Table9: C6920 interface options
Order option Description Device generation
FC9071-0000 Gigabit-Ethernet PC network card
10/100/1000 Mbit/s, 1 channel,
PCIe interface, covers the fieldbus
connection range
C6920-0050
C6920-0060
C6920-0070
C9900-E238 Additional DVI-D socket led out to
a slot cover, only for PCs with plug-
in card slots
C6920-0050
C6920-0060
C6920-0070
C9900-E294 Additional DisplayPort interface,
covers the fieldbus connection
range, max. resolution 1920 x
1080, can be ordered only once
per PC and not together with a
second DVI connection
C6920-0060
C6920-0070
C9900-E308 Serial interface, RS232, electrical
isolation, D-Sub, 9-pin, PCIe
interface covers the fieldbus
connection range
C6920-0060
PCI and PCIe plug-in card slots
In addition, you have the option to order the Industrial PC with additional PCI and PCIe plug-in card slots. In
this case you can extend the device by additional fieldbus interfaces and Ethernet ports. The following plug-
in card slots are available to you:
Table10: Ordering options – plug-in card slots
Order identifier Description
C9900-B506 2 PCIe-x1 plug-in card slots on passive backplane,
integrated in the C6920, for the insertion of PCIe-x1
plug-in cards up to 190 mm in length
C9900-B510 2 PCI plug-in card slots on passive backplane,
integrated in the C6920, for the insertion of PCI plug-
in cards up to 190 mm in length
C9900-B514 1 PCI and 1 PCIe-x1 plug-in card slot on passive
backplane, integrated in the C6920, for the insertion
of 1 PCI and 1 PCIe-x1 plug-in card up to 190 mm in
length
The plug-in card slots are located behind the flap next to the connection area of the Industrial PC. In order to
mount plug-in cards, you have to loosen the Philips screw and open the flap (see fig. 7).

Product overview
C692016 Version: 4.0
Fig.7: C6920_Access to plug-in card slots
When you have inserted the plug-in cards, the card connections are located on the right on the top side of
the PC (see fig. 8).
Fig.8: C6920_Plug-in card connections
The additional plug-in card slots change the dimensions of the Industrial PC. The width of the device
increases by 70 mm and the depth by 18 mm.

Product overview
C6920 17Version: 4.0
3.4 Status LEDs
The Industrial PC has seven status LEDs: PWR, TC, IDE, FAN, USR, FB RUN, FB ERR. They provide
information on the following aspects:
• the status of the power controller
• the TwinCAT status
• the hard disk activity
• thefan status
• the user
• the fieldbus activity
• the fieldbus status
The figure shows where the LEDs are located on the Industrial PC.
Fig.9: C6920 Status LEDs
Table11: Meaning of the Status LEDs
LED Color/flashing interval Meaning
PWR (Power) green
green flashing
Operation
Standby
TC (TwinCAT) red
green
blue
Stop Mode
Run Mode
Configuration mode
IDE/HDD red Access to storage medium
FAN green
red
Fans running
Fans failed
USR (user) programmable
FB RUN (fieldbus active) green
red
active
not active
FB Error (fieldbus error) red error

Product overview
C692018 Version: 4.0
3.5 Name plate
The name plate provides information on the equipment fitted to the Industrial PC. The name plate shown
here serves only as an example.
11
1
2
3
4
5
6
7
8
9
10
12
13
xxxxxxxx
xxxxxxxxxxxxx
xxxxxxxxxxxxx
14
15
Fig.10: C6920_Name plate example

Product overview
C6920 19Version: 4.0
Table12: Key: name plate C6920
No. Description
1 Model: The last four digits indicate the device generation.
2 Serial number (BTN)
3 Date of manufacture
4 Mainboard
5 CPU
6 RAM
7 Mini PCI slot
8 Storage media
9 Storage media
10 Power supply unit: 24 VDC
11 MAC addresses of the Ethernet interfaces (X102, X103)
12 FCC approval
13 Address of the vendor
14 Symbols
Note: Here are the symbols applicable to the device such as CE, EAC, UKCA, . The
approvals of your device can be found on the name plate and in chapter 10.2 Approvals.
15 Variant number: Commercial number of the order code including ordering options

Commissioning
C692020 Version: 4.0
4 Commissioning
To be able to use the Industrial PC, you must first commission it. The first step is to transport the device to is
operating location and unpack it. This is followed by installing the device in the control cabinet, connecting
the cables and the power supply and finally switching on the Industrial PC.
4.1 Transport and unpacking
Note the specified transport and storage conditions (see Chapter 9 Technical data [}47]).
Despite the robust design of the unit, the components are sensitive to strong vibrations and impacts.
Transporting a control cabinet with a built-in PC can result in excessive impact on the industrial PC. During
transport the device must therefore be protected from excessive mechanical stress. Appropriate packaging
of the industrial PC, in particular the original packaging, can improve the vibration resistance during
transport.
NOTICE
Hardware damage due to condensation
Unfavorable weather conditions during transport can cause damage to the device.
• Protect the device against moisture (condensation) during transport in cold weather or in case of
extreme temperature fluctuations.
• Do not put the device into operation until it has slowly adjusted to the room temperature.
• Should condensation occur, wait for about 12 hours before switching the device on.
Unpacking
Proceed as follows to unpack the unit:
1. Remove packaging.
2. Keep the packaging for possible future transport.
3. Check your delivery for completeness by comparing it with your order.
4. Check the contents for visible shipping damage.
5. In case of discrepancies between the package contents and the order, or in case of transport damage,
please inform Beckhoff Service (see Chapter 10.1 Service and support).