Installation,
Wiring,
and
Specifications
2--2
Installation, Wiring, and Specifications
DL105 PLC User Manual, 3rd Edition
Safety Guidelines
WARNING: Providing a safe operating environment for personnel and
equipment is your responsibility and should be your primary goal during
system planning and installation. Automation systems can fail and may result
in situations that can cause serious injury to personnel or damage to
equipment. Do not rely on the automation system alone to provide a safe
operating environment. You should use external electromechanical devices,
such as relays or limit switches, that are independent of the PLC application to
provide protection for any part of the system that may cause personal injury or
damage.
Every automation application is different, so there may be special
requirements for your particular application. Make sure you follow all
national, state, and local government requirements for the proper installation
and use of your equipment.
The best way to provide a safe operating environment is to make personnel and
equipment safety part of the planning process. You should examine
every
aspect of
the system to determine which areas are critical to operator or machine safety. If you
are not familiar with PLC system installation practices, or your company does not
have established installation guidelines, you should obtain additional information
from the following sources.
S
NEMA
— The National Electrical Manufacturers Association, located in
Washington, D.C., publishes many different documents that discuss
standards for industrial control systems. You can order these
publications directly from NEMA. Some of these include:
ICS 1, General Standards for Industrial Control and Systems
ICS 3, Industrial Systems
ICS 6, Enclosures for Industrial Control Systems
S
NEC
— The National Electrical Code provides regulations concerning
the installation and use of various types of electrical equipment. Copies
of the NEC Handbook can often be obtained from your local electrical
equipment distributor or your local library.
S
Local and State Agencies
— many local governments and state
governments have additional requirements above and beyond those
described in the NEC Handbook. Check with your local Electrical
Inspector or Fire Marshall office for information.
The publications mentioned provide many ideas and requirements for system
safety. At a minimum, you should follow these regulations. Also, you should use the
following techniques, which may help reduce the risk of safety concerns.
S
Orderly system shutdown sequence in the PLC control program.
S
System power disconnects (guard limits, emergency stop switches, etc.)
Plan for Safety
Safety Techniques
Содержание DL105
Страница 2: ...DL105 PLC User Manual Manual Number D1 USER M...
Страница 308: ...1B DL105 Error Codes In This Appendix Error Code Table...
Страница 314: ...1C Instruction Execution Times In This Appendix Introduction Instruction Execution Times...
Страница 324: ...1D Special Relays In This Appendix DL105 PLC Special Relays...
Страница 327: ...1E PLC Memory In This Appendix DL105 PLC Memory...
Страница 329: ...1F European Union Directives CE In This Appendix European Union EU Directives Basic EMC Installation Guidelines...