G9SP
D40A Non-Contact Switch Application
Application Overview
The power supply to motor M is turned OFF when emergency stop switch S1 is pressed.
The power supply to motor M is turned OFF by opening safety door S2.
Wiring Example
Program
PL/Safety Category
Model
Stop category
Reset
PLe/4 equivalent
•
Emergency stop pushbutton
A165E/A22E
•
Non-Contact Door Switch
D40Z
0
Manual
E1 and E2:
24-VDC power supplies
S1:
Emergency stop pushbutton
S2:
D40A Non-contact Switch
S3:
Reset switch
KM1and KM2: Contactors
M:
Motor
Note:
Refer to page 20 for the terminal arrangement.
Timing Chart
More than 350 ms
More than 350 ms
More than 350 ms
Idle
→
R
u
n
Reset O
N
E-Stop pressed
E-Stop released
Gate close
→
Open
Gate open
→
Close
E-Stop S1
N
on-contact
S
w
itch S2
Reset s
w
itch S3
KM1 and KM2
EDM feed
b
ack
Safety I/O Terminal Settings
Input Terminals
Output Terminals
Precautions for Safe Use
• Perform a function test every six months to
detect contact welding failures on contactors.
• It is the user's responsibility to make sure that
the entire system complies with standards.
• For safety reasons, two electrical switching
elements and two relays or contactors are
always necessary to detect electrical faults
and mechanical faults.
13