7
Overview
Section 1-1
Main Point
The standard covers all of the elements required in electrical devices, such as
control circuits, functions, and devices for electrical and electronic equipment,
safety measures, and technical materials related for installation, operation,
and maintenance.
Standard Related to Safety Switches
Summary
This standard applies to switching elements and control circuit devices cre-
ated for purposes such as control of switching control equipment, signals, and
interlock.
Main Points
Section 1: General Requirements
Section 2: Special Requirements for Indicator Lights
Section 3: Special Requirements for Direct Opening Operations
The standards cover topics such as switching capacity, temperature rise, ter-
minal strength, protective construction, and direct opening operations.
Standard Regarding Emergency Stop Equipment
Summary
This standard prescribes the design principles for emergency stop equipment.
Main Points
A direct opening mechanism must be provided.
A self-holding mechanism must be provided.
The stopping device must be in a form that is easy to operate, such as a pro-
truding pushbutton, a wire, or a rope.
The stopping device must be red with a yellow background.
Standards Applicable to
the NSH5
The following safety standards apply to the NSH5 PT.
• Based on EN 60204-1:1997
• Complies with EN 954-1:1996
EN 60204-1:1997 Safety Standard
EN 60204-1:1997 (Safety of Machinery - Electrical Equipment of Machines)
stipulates that an emergency stop switch must be red, and a stop switch must
be gray or black. When detaching and using the PT separate from the system,
always use a PT with a gray switch.
In the EN60204-1:1997 safety standard, emergency stop and emergency
shutdown are defined as emergency switches.
EN 60947-5-1
Low-voltage Switching Gear and Control Gear
Part 5: Control Circuit Devices and Switching Elements
Section 1: Electromechanical Control Circuit Devices
IEC Standards: IEC 60947-5-1; JIS Standards: JIS C 8201-5-1
EN 418
Emergency Stop Equipment
Functional Aspects: Principles for Design
ISO Standards: ISO 13850; JIS Standards: JIS B 9703
Emergency stop
Stop category 0 or 1
Emergency shutdown
Stop category 0 only
Summary of Contents for NSH5
Page 2: ......
Page 4: ...iv ...
Page 12: ...xii ...
Page 16: ...xvi ...
Page 24: ...xxiv EC Directives 6 ...
Page 58: ...34 Installing the Mounting Bracket Section 2 5 ...
Page 86: ...62 Connection Method Section 4 5 ...
Page 92: ...68 Precautions When Replacing the PT Section 5 4 ...
Page 98: ...74 General Specifications Appendix A ...
Page 99: ...75 Appendix B Dimensions 75 50 176 223 75 Four M4 70 5 16 5 ...
Page 102: ...78 Types of Memory Appendix C ...
Page 107: ...83 Recommended Enabling Circuits Appendix D Program Example ...
Page 108: ...84 Recommended Enabling Circuits Appendix D ...