This chapter provides safety considerations for operating the Cisco ONS 15200 system in combination with the ONS 15216 MUX/DEMUX filters, the ONS 15216 Erbium-Doped Fiber Amplifier (EDFA), and the ONS15216 Optical Add/Drop Multiplexer (OADM).
1.1 Critical Safety Warnings
Warning Do not perform cabling on an electrically live system. Ensure that all power is removed from the shelf before continuing with this procedure. Actual wire gauge should be determined based on local engineering standards and practices.
Warning Before connecting power to the ONS 15252 MCU, remove the fuses from both the A and B sides of the battery distribution bay (BDB) and power distribution panel (PDP). Failure to do so can cause serious injury or death. Actual wire gauge should be determined based on local engineering standards and practices.
Warning Before installing the ONS 15252 MCU, remove the fuses from both the A and B sides of the PDP. Failure to do so can cause serious injury or death.
Warning Touching electrical connectors or other exposed electrical circuitry inside the ONS 15252 MCU, ONS 15252 fan unit or ONS 15201 SCU when they are energized can cause serious injury or death.
Warning Before connecting power to the ONS 15201 SCU, remove the fuses from both the A and B sides of the BDB and PDP. Failure to do so can cause serious injury or death. Actual wire gauge should be determined based on local engineering standards and practices.
1.2 General Safety Precautions
The following general safety precautions are not related to any specific procedures and do not appear elsewhere in this publication. Personnel must understand and apply the following precautions during installation and testing of the ONS 15200 system.
Know standard electrical safety, electrical wiring, and connection practices.
Be familiar with cardio-pulmonary resuscitation (CPR). Obtain this information through the appropriate national authority (such as the Red Cross or the local equivalent). This knowledge is imperative for personnel working with or near voltages with levels capable of causing injury or death.
1.3 Recommended Safety Precautions
The following precautions are recommended when working on the ONS 15200 system:
Do not lift an object alone that could be too heavy for one individual.
Keep your work area tidy and free of obstructing objects at all times.
Do not wear loose clothing, jewelry, or other items that could be caught in the components during installation or use.
Use the equipment only in accordance with the electrical power rating.
Do not work alone if hazardous conditions may exist in your workplace.
Install the ONS 15200 components in compliance with the following local and national electrical codes:
In the United States: National Fire Protection Association (NFPA) 70; US National Electrical Code
In Canada: Canadian Electrical Code, part I, CSA C22.1
Elsewhere: International Electrotechnical Commission (IEC) 364, part 1-7
Properly ground the equipment.
Connect only a DC power source that complies with the Safety Extra-Low Voltage (SELV) requirements in UL1950, CSA 950, EN 60950, and IEC950 to an ONS 15200 DC power supply input.
Install DC power supplies used in restricted access areas in accordance with Articles 110-16, 110-17, and 110-18 of the National Electric Code, ANSI/NFPA 70.
Terminate all laser outputs properly before connecting laser inputs.
Disconnect the input end of an optical fiber jumper cable before disconnecting the output end.
Handle glass fiber with care. Glass fiber can be broken if mishandled. Using broken fiber can result in permanent equipment damage.
Protect skin from exposed glass fiber. It can penetrate the skin.
Limit the number of personnel that have access to lightwave transmission systems. Personnel should be authorized and properly trained if access to laser emissions is required.
Limit the use of laser test equipment to authorized, trained personnel during installation and service. This precaution includes using optical loss test (OLT) set, optical spectrum analyzer, and optical time domain reflectometer (OTDR) equipment.
Exclude any unauthorized personnel from the immediate laser radiation area during service and installation when there is a possibility that the system may become energized. Consider the immediate service area to be a temporary laser-controlled area.
The ONS 15200 system functions in the 1310- to 1550-nm window, which is considered invisible radiation. You cannot see the laser light being emitted by a fiber, a pigtail, or a bulkhead connector. Use appropriate eye protection during fiber-optic system installation or maintenance whenever there is potential for laser radiation exposure, as recommended by the company's health and safety procedures. Observe this precaution whether or not warning labels have been posted.
1.4 Safety Symbols and Labels
ONS 15200 equipment is clearly labeled with warnings about the equipment radiation level. Read and understand all warning labels before working with the equipment.
1.4.1 ONS 15252 Multichannel Unit Safety Labels
The ONS 15252 MCU has a warning label located inside the passive optical shelf door. The warning label consists of warning text and a warning triangle with a yellow background, as shown in Figure 1-1.
Figure 1-1 ONS 15252 MCU Laser Safety Warning Labels
1.4.2 ONS 15201 Single-Channel Unit Safety Labels
The ONS 15201 SCU has two warning labels. One label consists of the laser warning triangle shown in Figure 1-2. The other label consists of the laser warning text shown in Figure 1-3. Both labels have a yellow background. The triangle is placed above the text. In addition, small warning triangles and warning text are located close to the DWDM IN and OUT ports.
Figure 1-2 ONS 15201 SCU Laser Safety Warning Symbol Label
Figure 1-3 ONS 15201 SCU Laser Safety Warning Text Label
1.4.3 Client Layer Interface Port Safety Label
Each Client Layer Interface Port (CLIP) module is labeled with a laser radiation warning label similar to Figure 1-4. The warning label has a yellow background.
Figure 1-4 CLIP Module Laser Safety Warning Label
1.5 Electrostatic Discharge Cautions
Some ONS 15200 components are classified as Class 0 ESD-sensitive devices. Adhere to the following rules:
Observe standard precautions for handling ESD-sensitive devices.
Assume that all solid-state electronic devices are ESD-sensitive.
Ensure that you are grounded with a grounded wrist strap or equivalent while working with ESD-sensitive devices.
Transport, store, and handle ESD-sensitive devices in static-safe environments.
