These warnings are translated into several languages in the Regulatory Compliance and Safety Information for the Cisco Content Delivery Engines document.
The Cisco Compliance label can be found on the CDE chassis in the following locations:
Chassis bottom: CDE220, CDE420
Chassis top: CDE250, CDE280, CDE460
Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. Statement 12
Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. Statement 43
Warning For Nordic countries (Norway, Finland, Sweden and Denmark) this system must be installed in a Restricted Access Location, where the voltage of the main ground connection of all equipment is the same (equipotential earth) and the system is connected to a grounded electrical outlet. Statement 328
Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. Statement 1001
Warning Read the installation instructions before connecting the system to the power source. Statement 1004
Warning This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than 30 A. Statement 1005
To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety:
- This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
- When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.
- If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack. Statement 1006
Warning This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security. Statement 1017
Warning Take care when connecting units to the supply circuit so that wiring is not overloaded. Statement 1018
Warning The plug-socket combination must be accessible at all times, because it serves as the main disconnecting device. Statement 1019
Warning To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables. Statement 1021
Warning This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available. Statement 1024
Warning Class 1 LED product. Statement 1027
Warning This unit might have more than one power supply connection. All connections must be removed to de-energize the unit. Statement 1028
Warning Blank faceplates and cover panels serve three important functions: they prevent exposure to hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI) that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not operate the system unless all cards, faceplates, front covers, and rear covers are in place. Statement 1029
Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030
Warning To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the handles on modules (such as power supplies, fans, or cards); these types of handles are not designed to support the weight of the unit. Statement 1032
Warning Ultimate disposal of this product should be handled according to all national laws and regulations. Statement 1040
Warning This product requires short-circuit (overcurrent) protection, to be provided as part of the building installation. Install only in accordance with national and local wiring regulations. Statement 1045
Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or view directly with optical instruments. Statement 1051
Warning Installation of the equipment must comply with local and national electrical codes. Statement 1074
Warning The covers are an integral part of the safety design of the product. Do not operate the unit without the covers installed. Statement 1077
Warning This product is not intended to be directly connected to the Cable Distribution System. Additional regulatory compliance and legal requirements may apply for direct connection to the Cable Distribution System. This product may connect to the Cable Distribution System ONLY through a device that is approved for direct connection. Statement 1078
Warning Hazardous voltage or energy may be present on power terminals. Always replace cover when terminals are not in service. Be sure uninsulated conductors are not accessible when cover is in place. Statement 1086
Warning Avoid using or servicing any equipment that has outdoor connections during an electrical storm.
There may be a risk of electric shock from lightning. Statement 1088
Warning Main Land China Only
Only use at altitude 2000M or lower area.
Only use in non-tropical locations. Use in air conditioned room when in tropical locations.
AC Power Option Warnings
These warnings apply only to CDEs with the AC power option.
Warning The device is designed to work with TN power systems. Statement 19
Warning Connect the device to a grounded power outlet. Statement 25
DC Power Option Warnings
These warnings apply only to CDEs with the DC power option.
Warning When stranded wiring is required, use approved wiring terminations, such as closed-loop or spade-type with upturned lugs. These terminations should be the appropriate size for the wires and should clamp both the insulation and conductor. Statement 1002
Warning Before performing any procedures, ensure that power is removed from the DC circuit. Statement 1003
Warning A readily accessible two-poled disconnect device must be incorporated in the fixed wiring. Statement 1022
Warning Use copper conductors only. Statement 1025
Warning When installing or replacing the unit, the ground connection must always be made first and disconnected last. Statement 1046
To reduce the risk of bodily injury, electrical shock, fire, and damage to the equipment, observe the following precautions:
- Observe and follow service markings. Do not service any Cisco product except as explained in your system documentation. Opening or removing covers that are marked with the triangular symbol with a lightning bolt may expose you to electrical shock. Components inside these compartments should be serviced only by an authorized service technician.
- If any of the following conditions occurs, unplug the product from the electrical outlet and replace the part or contact your authorized service provider:
– Power cable or plug is damaged.
– Object has fallen into the product.
– Product has been exposed to water.
– Product has been dropped or damaged.
– Product does not operate correctly when you follow the operating instructions.
- Keep your system components away from radiators and heat sources. Also, do not block cooling vents.
- Do not spill food or liquids on your system components, and never operate the product in a wet environment.
- Do not push any objects into the openings of your system components. Doing so can cause fire or electric shock by shorting out interior components.
- Use the product only with other equipment approved by Cisco.
- Allow the product to cool before removing covers or touching internal components.
- Use the correct external power source. Operate the product only from the type of power source indicated on the electrical ratings label. If you are not sure of the type of power source required, consult your service representative or local power company.
- Use only approved power cables. If you have not been provided with a power cable for your system or for any AC-powered option intended for your system, purchase a power cable that is approved for use in your country. The power cable must be rated for the product and for the voltage and current marked on the electrical ratings label of the product. The voltage and current rating of the cable should be greater than the ratings marked on the product.
- To help prevent electric shock, plug the system components and peripheral power cables into properly grounded electrical outlets. These cables are equipped with three-prong plugs to help ensure proper grounding. Do not use adapter plugs or remove the grounding prong from a cable.
- Observe power strip ratings. Make sure that the total ampere rating of all products plugged into the power strip does not exceed 80 percent of the power strip ampere ratings limit.
- Do not use appliance or voltage converters or kits sold for appliances with your product.
- To help protect your system components from sudden, transient increases and decreases in electrical power, use a surge suppressor, line conditioner, or uninterruptible power supply (UPS).
- Position cables and power cords carefully; route cables and the power cord and plug so that they cannot be stepped on or tripped over. Be sure that nothing rests on your system components’ cables or power cord.
- Do not modify power cables or plugs. Consult a licensed electrician or your power company for site modifications. Always follow your local or national wiring rules.
This is an Federal Communications Commission (FCC) Class A device.
This product was evaluated as Information Technology Equipment (ITE), which may be installed in central offices, telecommunication centers, network telecommunication facilities, offices, schools, computer rooms, and similar commercial type locations where the National Electric Code (NEC) applies. The suitability of this product for other product categories and environments (medical, industrial, telecommunications, residential, alarm systems, test equipment, and so on), other than an ITE application, may require further evaluation.
Although CDEs accept both AC and DC power modules, the system does not allow mixing of AC and DC power modules in one system.
If AC Power Supplies Are Installed
Source AC power disconnect: The AC power cord is considered the source disconnect for the CDE and must be readily accessible when installed. If the individual CDE power cords are not readily accessible for disconnection, you must install an AC power disconnect for the entire rack unit. This main disconnect must be readily accessible, and it must be labeled as controlling power to the entire rack, not just to the CDEs.
Grounding the rack installation— If the CDE power cord is plugged into an AC outlet that is part of the rack, you must provide proper grounding for the rack itself. When the CDE power cord is plugged into a wall AC outlet, the safety ground conductor in the power cord provides proper grounding only for the CDE. Take precaution when the CDE power cord is plugged into an AC outlet that is part of the rack. You must make sure that proper grounding on the rack power outlet is provided or provide proper grounding for the rack itself.
Note When installing the CDEs, use the provided AC power cords.
Supplemental Grounding Connection
A supplemental ground connection is provided on the CDEs in case it is intended for installation in a rack and connection to a Common Bonding Network (CBN) as defined by NEBS GR-1089. To ground the CDE to the rack when rack-mounted, connect an additional grounding conductor to the CDE by using the separate listed closed two-hole crimp lug having 5/8-inch pitch. It is recommended that the grounding conductor wire be number 12 to number 10 AWG, with green insulation, rated minimum167°F (75°C), low smoke fume (LSF) and flame retardant. The ground connections should be tightened to a torque of 6 to 8 in-lb.
Use a grounding conductor to ground a CDE205, CDE220 or CDE280. The grounding conductor consists of the following parts:
- 2 hex head screws
- 2 round head screws
- 2 flat washers
- 2 tooth lock washers
- 1 grounding tab
Perform the following steps to install the grounding conductor to the CDE205, CDE220 or CDE280:
Step 1 Screw the two round head screws along with the tooth lock washer to the side of the ground tab.
Step 2 Place the hook side of the grounding tab to the rear mesh of the chassis and secure it using the two hex head screws with the flat washers (see Figure 2-1). The top of the ground tab should be even with the rear I/O shield.
Figure 2-1 CDE220 Rear View
The CDE280 grounding conductor consists of two screws that are mounted on the rear of the chassis (see Figure 2-2).
Figure 2-2 CDE280 Rear View
For information about the CDE285 grounding connections, see Cisco UCS C240 M4 Server Installation and Service Guide.
For the CDE420 grounding conductor consists of two screws that are mounted on the rear of the chassis (see Figure 2-3).
Figure 2-3 CDE420 Rear View
Overcurrent protection: The CDE is designed for an AC line voltage source with up to 20 A of overcurrent protection per cord feed. If the power system for the equipment rack is installed on a branch circuit with more than 20 A of protection, you must provide supplemental protection for the CDE. The overall current rating of a configured CDE is less than 6 A.
If DC Power Supplies Are Installed
Connection with a DC source should only be performed by trained service personnel. The CDE with DC input is to be installed in a Restricted Access Location in accordance with articles 110-16, 110-17, and 110-18 of the National Electric Code, ANSI/NFPA 70. The DC source must be electrically isolated by double or reinforced insulation from any hazardous AC source. The DC source must be capable of providing up to 900 watts of continuous power per feed pair.
Do not apply AC power to DC power modules.
As a general rule, take precautions when preparing DC power cables for connection to the CDE. Make sure to strip the power conductor insulation so that when installed, no external bare copper is accessible at the terminal block. The torque required for the DC input terminal block connection on the power supplies is 5 to 7 in-lb. Take precautions when connecting the polarity. The DC power input terminals are marked as –48 V and RTN. The –48 V terminal is for the Negative (source DC –48 V or –60 V) and the RTN is for the Positive (source DC return). After power cables have been installed, be careful to avoid strain on the power connection. It is recommended that strain relief be provided as appropriate. For example, route the power cables in the rack and secure the cables with nylon tie wraps.
Source DC power disconnect— You are responsible for installing a properly rated DC power disconnect for the CDE system. This source disconnect must be readily accessible, and it must be labeled as controlling power to the CDE. The circuit breaker of a centralized DC power system may be used as a disconnect device when easily accessible and should be rated no more than 30 A.
Grounding the CDE— The ground connection must be made first and prior to powering the equipment. Each power module is provided with a ground connection using the 5-mm screw. The connection is to use a closed-loop lug and the screw is to be tightened to a torque of 6 to 8 in-lb. It is recommended that the ground wire be number 12 to number 10 AWG, with green/yellow insulation, rated minimum 167°F (75°C), low smoke fume (LSF) and flame retardant.
A supplemental ground connection is provided on the CDE in case it is intended for installation with an isolated DC return (DC-I) and is to be installed in a Common Bonding Network (CBN) per NEBS GR-1089. To reliably ground the CDE to the rack when rack-mounted, connect an additional grounding conductor to the CDE using the separate listed closed two-hole crimp lug having 5/8-inch pitch. It is recommended that the grounding conductor wire be number 12 to number 10 AWG, with green insulation, rated minimum 75°C (167°F), low smoke fume (LSF), and flame retardant. The ground connections should be tightened with a torque of 6 to 8 in-lb. The metal pin of each module near the input power connector is to be connected to a protective earthing conductor during final system assembly.
Overcurrent protection— Overcurrent protection circuit breakers must be provided as part of each host equipment rack and must be incorporated in the field wiring between the DC source and the CDE. The branch circuit protection should be connected to a 30 A UL listed circuit breaker (or suitably certified for the country used), rated minimum 75 VDC, and copper wire conductors, sized for 24 A current (12 AWG).
Temperature and Ventilation
The ambient temperature in which the CDE operates must not exceed the range established for each CDE type as defined in Appendix A, “Technical Specifications”. Extreme fluctuations in temperature can cause a variety of problems in your CDE.
To maintain proper cooling, the equipment rack must provide sufficient airflow to the front of the CDE. The rack selected and the ventilation provided must be suitable to the environment in which the CDE will be used. The rack must include ventilation sufficient to exhaust the rate heat load of each CDE server (see Table A-8 in Appendix A, “Technical Specifications” ).