6
Overview
Section 1-1
Note
(1) When used in a safety control system, the stop/emergency stop switch
and enabling switch must be connected to a safety circuit.
(2) Do not use the function switches or the touch switches on the touch panel
as emergency stop switches in situations involving potential risk to hu-
man life or serious damage.
(3) Use safety circuits that are capable of detecting shorts in the stop/emer-
gency stop switch and enable switch.
1-1-8
Safety Standards
Overview of Standards
General Standards
Summary
This standard applies to design procedures for parts in control systems that
involve safety.
Main Point
The levels for machines are determined by taking into consideration the
degree of anticipated damage (from light to heavy) and the rate of occurrence
(from rare to frequent). The danger level is classified into five categories, and
for each category the safety functions that should be provided for control parts
are specified.
Summary
This standard applies to electrical devices in which the power supply nominal
voltage between lines is less than 1,000 V (for AC) or 1,500 V (for DC), and
the nominal frequency is less than 200 Hz.
RES
E
T
R
E
S
E
T
RE
SE
T
RUN
F6
F7
F8
F9
F10
F1
F2
F3
F4
F5
CS/CJ-series PLC
Safety circuits
Special Cable (3 or 10 m)
•
RS-232C: NSH5-232
@@
-
@@
M
•
RS-422A: NSH5-422
@@
-
@@
M
Loose wires (21)
Safety switch
outputs
Function
switch outputs
24-VDC power supply
9-pin D-sub (male)
EN 954-1:1996
Safety-related Parts of Control Systems
Part 1: General Principles for Design
EN 60204-1:1997
Electrical Equipment of Machines
Part 1: Specification for General Requirements
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 ...