Program
Precautions for Safe Use
• Test the functionality every six months to detect welded contactor contacts.
• The customer is responsible for attaining conformance of the entire system to standards.
•
To detect electrical and mechanical failures, use a combination of redundant semiconductor
output contacts and redundant mechanical output devices.
A-3-4
Safety Door Switches with Magnetic Locks and Key Selector
Switches
Application Overview
Safety category/PL Safety device Stop category Reset
Equivalent to 4/PLe
(Safety Door Switches with
Magnetic Locks)
• Emergency stop pushbutton
• Safety door switch with magnetic lock (me-
chanical lock type)
• Key selector switch
0 Manual
Safety doors S4 and S5 cannot be opened while the user mode is set for normal operation. The out-
puts are turned OFF by changing to maintenance mode and the safety doors can be opened 5 sec-
onds later
.
The outputs also turn OFF when emergency pushbutton S1 is pressed.
Appendices
A - 39
NX-series Safety Control Unit User's Manual (Z930)
A-3 Application Examples
A
A-3-4 Safety Door Switches with Magnetic Locks and Key Selector Switches
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