Product Description. Beckhoff C6920, C6925
Beckhoff C6920 is a compact control cabinet Industrial PC with a 3½-inch motherboard for Intel® Celeron® or Core™ i3/i5/i7. It has all PC connections at the front and internal cooling fins with an exchangeable fan cartridge. The device is suitable for a wide range of applications, including industrial automation, machine control, and data acquisition. Some of the key features of Beckhoff C6920 include:
- High performance: The C6920 is equipped with a powerful Intel® processor that delivers fast and reliable performance.
- Compact design: The C6920 has a compact and rugged design that makes it ideal for installation in space-constrained environments.
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2 Product Description
2.1 Product overview
Product Description
C6920 | Control cabinet Industrial PC
The Industrial PC C6920 is designed for control cabinet installation. The compact case is equipped with a
3½-inch motherboard for Intel® Celeron® or Core™ i3/i5/i7. All PC connections are located at the front of the housing. The cooling is done by internal cooling fins and an easily exchangeable fan cartridge at the bottom of the housing.
C6925 | Fanless control cabinet Industrial PC
The Industrial PC C6925 is designed for control cabinet installation. The compact housing is equipped with an Intel® Celeron® M ULV processor or Intel® Atom™ processor with up to four cores on a 3½-inch motherboard. All PC connections are located at the front of the housing. The cooling is done by cooling fins inside the housing. The PC can operate at temperatures up to 55 °C.
The Industrial PCs offer the following benefits:
• Industrial PC for space-saving control cabinet installation
• mounting sheet at the rear wall
• all connectors on the front
• status LEDs
• lithium battery accessible behind the front flap
• protection class IP 20
• operating temperature 0…55 °C.
C6920/ C6925 7
Product Description
2.2 Appropriate Use
The C6920/ C6925 series Industrial PCs are designed for mounting in control cabinets for machine and plant engineering applications.
Risk of explosion!
The Industrial PC must not be used where there is a risk of explosion.
Danger
Front view of C6920/
C6925
C6920
C6925
The C6920 is fitted with a fan cartridge with observated double ball bearing fans, exchangeable at the front.
The C6925 is a fanless Industrial PC with passive cooling.
8 C6920/ C6925
2.3 Access to the battery and drives
Access to hard-disk
(optional), CF-Card/
CFast-Card and the battery
1
2
3
4
Product Description
Opening the front flap (1) allows access to the battery (2), the CF-Card/ CFast-Card (3) and the hard disk (4) (optional).
When provided with a CF-Card the ejection of the card occurs by pressing the eject button below the card slot.
Danger of Explosion!
WARNING
Replace battery only with the identical type or an alternative type recommended by the manufacturer. Notice correct polarity!
Polarity of the battery:
+
-
Handling of Lithium Batteries
WARNING
Lithium Batteries should not be recharged, exposed to fire, opened and they should be protected against sunlight and moisture.
C6920/ C6925 9
Product Description
2.4 Status-LEDs
The Status-LEDs (2) are located near the power supply connector (X101):
2
X101
Description of the Status-LEDs:
1 PWR (Power):
2
5
6
3
4
7
TC (TwinCAT):
IDE/ HDD:
FAN:
USR (User):
FB RUN (Fieldbus activ):
FB Error (Fieldbus Error): green green blinking red green blue red green red green red red
Busy
Standby
Stop Mode
Run Mode
Configuration Mode
Access to a memory device
Fans running
Fan Error
Programmable
Activ
Not activ
Error
2.5 Fan cartridge C6920
For optimal cooling the C6920 Industrial PC is equipped with a fan cartridge with two fans. The fan cartridge can be exchanged.
Replace the fans only with the identical type or an alternative type approved by Beckhoff.
View from the top
2
1
2.5.1 Exchanging the fan cartridge
For exchanging the fan cartridge (1), first solve the knurled screw (2). The cartridge can then be folded down and taken out.
10 C6920/ C6925
Product Description
2.6 Extension for PCI and PCIe plug-in cards
When ordered with the following options the Control Cabinet Industrial PC C6920-0020 und –0030 can be extended by two additional plug-in card slots:
Options C6920-0020 and –0030
C9900-B506 2 PCIe plug-in card slots on the passive backplane integrated inside C6920, to plug-in
PCIe x1 cards up to 190 mm (6.3“) length.
C9900-B510 2 PCI plug-in card slots on the passive backplane integrated inside C6920, to plug-in
PCI cards up to 190 mm (6.3“) length.
C9900-B514 1 PCI and 1 PCIe plug-in card slot on a passive backplane integrated inside C6920, to plug-in one PCI and one PCIe x1 card up to 190 mm (6.3“) length.
2.6.1 Access to the plug-in card slots
The plug-in card slots are located behind the cover next to the interfaces of the Industrial PC.
For mounting the plug-in cards first solve the cross-head screw (1). The cover (2) can now be opened and allows to plug in the cards.
Opening the cover
1
2
C6920/ C6925 11
Product Description
2.7 Interfaces
X109 X108
X106
X107
X104
X105
X103 X102 X101
X110
2.7.1 Power Supply (X101)
The power supply for the Industrial PC is established via the socket (X101).
2.7.2 Network connection (X102, X103)
The RJ-45 connector (X102) allows the PC to be connected to a 10/100/1000BASE-T Local Area
Network (LAN). The Ethernet Port is connected via PCIe, at the C6920-0040/ -0050 the Port is integrated in the chipset.
The RJ-45 connector (X103) allows the PC to be connected to a 10/100BASE-T Local Area Network
(LAN) (till version –0020) and to a 10/100/1000BASE-T Local Area Network (LAN) (version -0020 and higher). The Ethernet Port is integrated in the chipset, at the C6920-0040/ -0050 the Port is connected via
PCIe.
Cycle times:
• The Ethernet Port connected via PCIe is normally suitable for cycle times <= 1 ms and for Distributed-
Clock applications with EtherCAT.
• The Ethernet Port integrated in the chipset is normally suitable for Real-Time-Ethernet applications with cycle times > 1 ms (without Distributed Clocks).
2.7.3 USB-Interfaces (X104 – X107)
The four USB interfaces (X104 – X107) are used for connecting peripheral devices with USB connection.
USB2.0 standard is supported.
2.7.4 DVI (Digital Visual Interface) (X108)
The DVI connection (X108) is used for transferring the video signal. DVI-I standard is supported.
2.7.5 Serial interface (X109)
The Industrial PC has one serial interfaces, COM1 (X109), using the type RS232, which is brought to a
9 pin SUB-D plug connector.
2.7.6 Fieldbus (X110)
The Industrial PC has one fieldbus-interface (X110), which is brought to a 9 pin SUB-D plug connector.
2.7.7 Additional plug-in cards (optional)
There is a type plate on the top of the Industrial PC which provides information about the hardware configuration of the Industrial PC at the time it was supplied.
2.7.8 Extension for PCI and PCIe plug-in cards (optional)
0ptional the Industrial PC can be extended by two plug-in card slots on the passive backplane.
2.7.9 Ground connection
12 C6920/ C6925
Installation
3 Installation
3.1 Transport and Unpacking
The specified storage conditions must be observed (see chapter
3.1.1 Transport
Despite the robust design of the unit, the components are sensitive to strong vibrations and impacts.
During transport, the Industrial PC should be protected from excessive mechanical stress. Therefore, please use the original packaging.
Danger of damage to the unit
Attention
If the device is transported in cold weather or is exposed to extreme variations in temperature, make sure that moisture (condensation) does not form on or inside the device.
Prior to operation, the unit must be allowed to slowly adjust to room temperature. Should condensation occur, a delay time of approximately 12 hours must be allowed before the unit is switched on.
3.1.2 Unpacking
Proceed as follows to unpack the unit:
2. Do not discard the original packaging. Keep it for future relocation.
3. Check the delivery for completeness by comparing it with your order.
4. Please keep the associated paperwork. It contains important information for handling the unit.
5. Check the contents for visible shipping damage.
6. If you notice any shipping damage or inconsistencies between the contents and your order, you should notify Beckhoff Service.
C6920/ C6925 13
Installation
3.2 Installation of the PC in the control cabinet
The C6920/ C6925 Industrial PCs are designed for mounting in control cabinets for machine and plant engineering applications.
The ambient conditions specified for operation must be observed (see chapter
3.2.1 Preparation of the control cabinet
Four holes for the fixing bolts have to be provided in the control cabinet according to the dimensions of the PC (see chapter
Note
Circulation of air
When the unit is installed in an enclosure, adequate space for ventilation and for opening the PC must be provided.
The clearance above and below the housing must be at least 5 cm in order to ensure adequate ventilation of the PC.
Avoid extreme environmental conditions
Attention
Extreme environmental conditions should be avoided as far as possible. Protect the PC from dust, moisture and heat.
The ventilation slots of the PC must not be covered.
3.2.2 Earthing measures
Earthing connections dissipate interference from external power supply cables, signal cables or cables to peripheral equipment.
Establish a low-impedance connection from the earthing point on the PC housing to the central earthing point on the control cabinet wall, in which the computer is being installed. The earthing connection is located at the mounting plate of the Industrial PC.
14 C6920/ C6925
Installation
3.3 Power supply of the Industrial PC
The Industrial PC is optionally fitted with a 24 V
DC
power supply unit .
Note
Uninterruptible power supply (UPS)
When the Industrial PC is provided with a power supply unit with integrated UPS (order option) you can realize an uninterruptible power supply (UPS) using the battery pack
C9900-U330 or C9900-U332.
Danger of Explosion!
WARNING
Danger of Explosion if using other battery packs!
3.3.1 Beckhoff power supply technology
Schematic diagram of power supply unit wirings
Industrial PCs equipped with a UPS are in actual use frequently switched off by simply turning off the supply voltage. In this case the PC shuts down via the battery. However, over time this reduces the service life of the battery.
The new Beckhoff power supply technology approach addresses this problem and now offers the user the option of switching the PC off without the need for using the battery, thereby reducing the load on the battery.
In addition to the main switch this innovative solution uses an ON/OFF switch for the machine. Basically, the main switch remains switched on and provides the power supply for the PC during shutdown. Via the
PC ON-input of the power supply the PC gets the command to shut down the operating system.
Once the PC has shut down, the PC power supply unit sets the Power Status-output (P-S) to 0, what indicates that the process is complete and that the main voltage can be switched off. This can be done manually via a signal lamp connection or via a contactor. With this solution the main switch generally only has to be switched off if the control cabinet has to be opened. The battery will only be used in the event of
C6920/ C6925 15
Installation a power failure.
In order to maintain a screen display for the Industrial PC in the event of a power failure, the power supply unit is equipped with a UPS output 27 V / 1.4 A (max. 2.5 A from 2016 and later), for connecting a Control
Panel with a display dimension up to 19 inches. This enables a power failure to be visualized and displayed to the user. Once the PC has shut down, the UPS output is switched off.
For a detailed functional description please refer to section
3.3.1.1 Pin assignment of the connector
The power supply and the external circuit for switching the Industrial PC on and off are connected via the
8-pole plug connector.
1 2 3 4 5 6 7 8
Pin assignment for connecting the switch, the power supply and the battery pack (optional):
Pin Function
1 -
2 +
Battery Pack
(with UPS only)
3 UPS+ (Output)
4
5 -
6 +
7 PC_ON
24 V DC Power Supply
8 Power-Status
16 C6920/ C6925
Installation
3.3.2 Fitting the cable
Fit the cables for the power supply of the Industrial PC, the connection of the battery pack as well as the connection of the power-switch in accordance with the wiring diagram, using the included material for assembling the connectors.
3.3.2.1 Material for assembling the connectors
Plug connector 8-pole, Strain relief housing with lacing cord
3.3.2.2 Assembling the connectors
The connector is specified for 16 A and can lift conductive cross-sections until 1.5 mm
2
.
So the connector is fitted to the cable:
1. Strip insulation from the cable ends (Length of stripped conductor is 8 – 9 mm).
2. Screw together the cable ends in the 8-pole plug connector in accordance with wiring diagram.
Thread the lacing cord into that lower part of the strain relief housing.
Put the plug connector into that lower part of the strain relief housing.
Tighten the lacing cord and pinch off the plastic strap.
Fix the upper part of the strain relief housing by snapping it onto the lower part.
C6920/ C6925 17
Installation
3.3.3 Connecting Power Supply
The external wiring consists of the connection of the power supply, the battery pack (optional) and the connection of customized components for shutting down the PC.
3.3.3.1 Cable Cross Sections
For the connection of the power supply, wiring with a cable-cross-section of 1.5 mm
2
must be used.
With bigger distances between voltage source and PC, you take the voltage drop as a function of the cable-cross-section as well as voltage fluctuations of your distribution voltage into account, so that is secured that the voltage doesn't fall under 22 V at the power supply.
Insert fuse
Attention
The power supply must be protected with maximum 16 A.
3.3.3.2 Configuration for shutting down the PC
The connections for shutting down the Industrial PCs are established via the PC_ON input and the Power
Status output.
3.3.3.3 PC_ON and Power Status functions
• If the PC_ON input is connected to 24 V via a switch, the PC shuts down according to the rules.
The PC_ON signal is inverted, i.e. the PC shuts down if the 24 V connection is live.
• If the PC_ON input is NOT connected by the user, the PC can be booted in the familiar way by connecting the supply voltage and shut down via the battery by switching off the supply voltage.
Service life of the rechargeable battery
Attention
This procedure significantly reduces the service life of the rechargeable battery and should therefore not be used.
• Once the PC has shut down, the Power Status output is switched from 24 V to 0 V. Via this output a signal lamp can be connected or a contactor for de-energizing the whole system. The maximum load for the Power Status output is 0.5 A and a suitable fuse should be provided.
In order to maintain a screen display for the PC in the event of a power failure, the power supply unit is equipped with a UPS output for connecting a Control Panel. The maximum load for the output is 1.4 A
(max. 2.5 A from 2016 and later).
3.3.3.5 UPS output function
• The 24 V DC connection at the UPS output is live even after a power failure. The maximum load is 1.4 A (max. 2.5 A from 2016 and later).
• Once the PC has been de-energized via the UPS software, the UPS output is switched to 0 V.
Any connected panel is thus switched off, and total discharge of the rechargeable battery is prevented.
18 C6920/ C6925
Wiring according to the wiring diagram (the circuit of PC_ON and Power-Status is symbolical):
Wiring diagram external switch and power supply
Installation
Note
Connection of the Battery Pack and UPS Output
Connection of the Battery Pack and UPS Output only in combination with integrated
UPS (order option).
C6920/ C6925 19
Installation
3.4 Connecting the Industrial PC
The mains plug must be disconnected
Attention
The power supply plug must be withdrawn!
Please read the documentation for the external devices prior to connecting them!
During thunderstorms, plug connector must neither be inserted nor removed!
When disconnecting a plug connector, always handle it at the plug. Do not pull the cable!
3.4.1 Connecting cables
The connections are located at the rear side of the Industrial PC and are documented in the
When connecting the cables to the Industrial PC, proceed according to the following sequence:
• Switch off all the devices that are to be connected.
• Disconnect all the devices that are to be connected from the power supply.
• Connect all the cables between the Industrial PC and to the devices that are to be connected.
• Connect all data transfer cables (if present) to the appropriate plug-in receptacles of the data/ telecommunication networks.
• Reconnect all devices to the power supply.
3.4.2 Check voltage rating and connect
Fitted with a 24 V
DC
power supply unit:
1. Check that the external power supply is providing the correct voltage.
2. Insert the power supply cable that you have assembled into the Industrial PC's power supply socket. Then connect it to your external 24 V power supply.
Use same type of rechargeable battery
Attention
If a 24 V UPS is installed, the same type of rechargeable battery must be used.
20 C6920/ C6925
Operating Instructions
4 Operating Instructions
4.1 Switching the Industrial PC on and off
4.1.1 Switch on
The Industrial PC does not have its own mains switch. The Industrial PC will start when the equipment is switched on, or when it is connected to the power supply.
4.1.2 Shutting down and switching off
When the plant is switched off, or when it is disconnected from its power supply, the Industrial PC will be switched off.
Control software such as is typically used on Industrial PCs permits various users to be given different rights. A user who may not close software may also not switch the Industrial PC off, since data can be lost from the hard disk by switching off while software is running.
First shut down, then switch off the PC
Attention
If the Industrial PC is switched off as the software is writing a file to the memory drive, the file will be destroyed. Control software typically writes something to the memory drive every few seconds, so that the probability of causing damage by switching off while the software is running is very high.
Switch off power supply
Attention
When you have shut down the Industrial PC, you have to switch off power supply for at least 10 seconds before rebooting the system.
After resetting power supply the PC will start booting automatically.
4.1.3 First switching on and driver installation
When you switch on the Industrial PC for the first time, the pre-installed operating system (optional) will be started. In this case, all the required drivers for any additional, optional hardware components ordered with the PC will already have been installed.
If the PC was ordered without operating system, you have to install the operating system and the driver software for any auxiliary hardware yourself. Please follow the instructions in the documentation for the operating system and the additional devices.
C6920/ C6925 21
Operating Instructions
4.2 Servicing and maintenance
4.2.1 Cleaning of the Industrial PC
Disconnect power supply
DANGER
Switch off the Industrial PC and all connected devices, and disconnect the Industrial
PC from the power supply.
The device can be cleaned with a soft, damp cleaning cloth. Do not use any aggressive cleaning materials, thinners, scouring material or hard objects that could cause scratches.
4.2.2 Maintenance
The Industrial PC is maintenance-free.
4.2.3 Replacing the Battery on the Motherboard
A used battery on the motherboard has to be replaced. See also chapter
Access to the battery and drives
Danger of Explosion!
WARNING
Replace battery only with the identical type or an alternative type recommended by the manufacturer. Notice correct polarity!
Handling of Lithium Batteries
WARNING
Lithium Batteries should not be recharged, exposed to fire, opened and they should be protected against sunlight and moisture.
The used battery must be disposed of in accordance with national electronics scrap regulations.
4.3 Emergency procedures
In case of fire, the Industrial PC should be extinguished with powder or nitrogen.
4.4 Shutting down
4.4.1 Disposal
Observe national electronics scrap regulations
Observe the national electronics scrap regulations when disposing of the device.
Note
In order to dispose of the device, it must be removed and fully dismantled:
22
• Housing components (polycarbonate, polyamide (PA6.6)) are suitable for plastic recycling
• Metal parts can be sent for metal recycling
• Electronic parts such as disk drives and circuit boards must be disposed of in accordance with national electronics scrap regulations.
C6920/ C6925
UPS Software Components (optional)
5 UPS Software Components (optional)
For operating the power supply unit as a UPS, the UPS driver software and the associated UPS driver must be installed on the Industrial PC.
On delivery of the Beckhoff Industrial PC with operating system the software is already installed. Should the software not be installed on your PC, the drivers can be installed from the driver CD provided.
5.1 Installation on the PC
To install the UPS driver software, execute file Beckhoff_UPS_vx.xx.xx.exe from the subdirectory of
UPS\… from the CD provided on the Industrial PC (Driver-archive for the Industrial-PC, C9900-S700xxxx).
The program is self-extracting and will guide the user through the installation routine.
5.2 Help files
The driver software comes with a detailed help function.
The help files can be called up either directly from the configuration register by clicking the Help button, or under via Start > Programs > Beckhoff > UPS software components.
C6920/ C6925 23
Troubleshooting
6 Troubleshooting
Fault Cause
Nothing happens after the Industrial
PC has been switched on
No power supply to the Industrial
PC
Other cause
The Industrial PC does not boot fully
Computer boots, software starts, but control does not operate correctly
Setup settings are incorrect
Other cause
Cause of the fault is either in the software or in parts of the plant outside the Industrial PC
Memory device access error Faulty device
The Industrial PC functions only partially or only part of the time, e.g. no or dark picture, but disk drive responds when switching on
Defective components in the
Industrial PC
Procedure
Check power supply cable
Call Beckhoff Service
Check the setup settings
Call Beckhoff Service
Call the manufacturer of the machine or the software
Call Beckhoff Service
Call Beckhoff Service
24 C6920/ C6925
Assembly dimensions
7 Assembly dimensions
Industrial PC C6920
Notice mounting orientation
Attention
The assembly of the unit must take place with the orientation diagrammed here.
All dimensions in mm.
C6920/ C6925 25
Assembly dimensions
Industrial PC C6920, with Mounting plate at the side wall C9900-M653
Notice mounting orientation
Attention
The assembly of the unit must take place with the orientation diagrammed here.
All dimensions in mm.
26 C6920/ C6925
Assembly dimensions
Industrial PC C6920 with plug-in card slots
Notice mounting orientation
Attention
The assembly of the unit must take place with the orientation diagrammed here.
All dimensions in mm.
C6920/ C6925 27
Assembly dimensions
Industrial PC C6920 with plug-in card slots,
Mounting plate at the side wall C9900-M653
Notice mounting orientation
Attention
The assembly of the unit must take place with the orientation diagrammed here.
All dimensions in mm.
28 C6920/ C6925
Assembly dimensions
Industrial PC C6925
Notice mounting orientation
Attention
The assembly of the unit must take place with the orientation diagrammed here.
All dimensions in mm.
C6920/ C6925 29
Assembly dimensions
Industrial PC C6925 with Mounting plate at the side wall C9900-M653
Notice mounting orientation
Attention
The assembly of the unit must take place with the orientation diagrammed here.
All dimensions in mm.
30 C6920/ C6925
Technical Data
8 Technical Data
Danger
Risk of explosion!
Do not use the Industrial PC in areas of explosive hazard!
Product name
Dimensions (B x H x T)
Weight
Supply voltage
Power consumption
C6920, C6925
see chapter
C6920: 1.9 kg (basic configuration)
C6920 with plug-in card slots: 3.1 kg (basic configuration)
C6925: 1.85 kg (basic configuration)
22–30V V
DC
(24 V
DC
power supply unit)
C6920:
C6925: app. 70 W (basic configuration) app. 35 W (basic configuration)
Interfaces
Protection class
Shock resistance
(Sinusoidal vibration)
1 x DVI-I
2 x RJ-45 Ethernet BASE-T
4 x USB 2.0
1 x RS232 D-Sub-9
IP20
EN 60068-2-6:
EN 60068-2-27:
10 to 58 Hz:
5 G (~ 50 m/ s
2
0,035 mm
58 to 500 Hz: 0,5 G (~ 5 m/ s
2
)
), duration: 30 ms Shock resistance
(Shock)
EMC compatibility Resistance to interference conforms to EN 61000-6-2
EMC compatibility Emission of interference conforms to EN 61000-6-4
Permissible ambient temperature 0°C to +55°C (operation)
-25°C to +65°C (transport/ storage)
Permissible relative humidity
Transport and storage to 95%, no condensation
The same values for atmospheric humidity and shock resistance are to be observed during transport and storage as in operation. Suitable packaging of the Industrial PC can improve the resistance to impact during transport.
Certifications CE
C6920/ C6925 31
Appendix
9 Appendix
9.1 Beckhoff Support and Service
Beckhoff and their partners around the world offer comprehensive support and service, making available fast and competent assistance with all questions related to Beckhoff products and system solutions.
9.1.1 Beckhoff branches and partner companies
Please contact your Beckhoff branch office or partner company for local support and service on Beckhoff products!
The contact addresses for your country can be found in the list of Beckhoff branches and partner companies: www.beckhoff.com
. You will also find further documentation for Beckhoff components there.
9.1.2 Beckhoff company headquarters
Beckhoff Automation GmbH & Co. KG
Huelshorstweg 20
33415 Verl
Germany
Phone:
Fax:
E-mail:
Web:
+ 49 (0) 5246/963-0
+ 49 (0) 5246/963-198 [email protected]
http://www.beckhoff.de/
Beckhoff Support
Support offers you comprehensive technical assistance, helping you not only with the application of individual Beckhoff products, but also with other, wide-ranging services:
• world-wide support
• design, programming and commissioning of complex automation systems
• and extensive training program for Beckhoff system components
Hotline:
Fax:
E-mail:
+ 49 (0) 5246/963-157
+ 49 (0) 5246/963-9157 [email protected]
Beckhoff Service
The Beckhoff Service Center supports you in all matters of after-sales service:
• on-site service
• repair service
• spare parts service
• hotline service
Hotline:
Fax:
E-mail:
+ 49 (0) 5246/963-460
+ 49 (0) 5246/963-479 [email protected]
If servicing is required, please quote the project number of your product.
32 C6920/ C6925
Appendix
9.2 Approvals for USA and Canada
9.3 FCC Approvals for the United States of America
FCC: Federal Communications Commission Radio Frequency Interference Statement
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.
Note
Technical modifications
Technological changes to the device may cause the loss of the FCC approval.
9.4 FCC Approval for Canada
FCC: Canadian Notice
This equipment does not exceed the Class A limits for radiated emissions as described in the Radio
Interference Regulations of the Canadian Department of Communications.
C6920/ C6925 33
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