A22TK
10
●
Application Overview
(1) In normal operation mode, the power supply to the motor M is turned ON when the reset switch S7 is pressed while the rotator is stopped and
the guard is locked after closed.
(2) The PLC sends high speed rotation command to the motor controller.
(3) The stop signal is applied with the S8.
(4) The PLC sends deceleration command to the motor controller.
(5) The guard can be unlocked when the rotator slows down to the safe speed.
(6) The power supply to the motor M is turned OFF when the guard is unlocked with the S5.
(7) The mode switches to maintenance mode with the mode selection switch.
(8) The PLC sends low speed rotation command to the motor controller.
(9) The power supply to the motor M is automatically turned ON again by gripping the enabling switch to the middle position.
(10)The operator opens the guard and performs maintenance work.
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Evaluation example
Note: The above PL is only the evaluation result of the example concerning solely the mode selection. The PL must be evaluated in an actual
application by the customer after confirming the usage conditions.
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Circuit Diagram
PL/safety category
Model
Stop category
Reset
PLd/3 equivalent
Safety Key Selector Switch A22TK-2
@@
-11 (SPST-NO/SPST-NC type)
Guard lock Safety-door Switch
D4NL-
@
A
@
A-
@
, -
@
A
@
B-
@
, -
@
A
@
C-
@
(Mechanical Lock Type)
Enabling Grip Switch A4EG
Low-speed Monitoring Unit G9SX-LM224-F10-R
@
Flexible Safety Unit G9SX-BC202 (24 VDC)
−
−
S1
Emergency Stop
Switch
Feedback loop
KM1
KM2
T42
T41
T33
T32
T31
Y2
T71 T72
T62
T61
M2
M1
Y1
T22
T21
T12
T11
A1
D22
D21
D12
D11
X4
X3
X2
X1
L1
ES2
ES1
S24
S14
A2
M
KM2
KM1
Motor controller
Lock release
switch
S5
E2
E1
41
42
12
11
11
12
S3
open
Guard
S8
Stop signal
+24V
S6
Open
Open
+24V
S7
Enabling
Switch
AND
OFF
Rotator (interlocked with M)
KM2
KM1
Indicator
+24V
GND
G9SX-LM224-F10
Blue
Black
Brown
Black
Brown
Control circuit
S4
Guard lock
Safety-door Switch
21
22
11
12
Open
Y1
T33
T32
T31
T22
T21
T12
T11
A1
+24V
G9SX-BC202
Control circuit
PLC etc.
X2
X1
L2
L1
S24
S14
A2
S2
Selector Switch
A22TK
High speed rotation
Guard can be opened.
Guard closed --> opened
Emergency Stop Switch S1
Reset switch S2
Logical AND output L1
Safety limit switch S3
Guard lock
Safety-door Switch S4
KM1, KM2 NC contact
KM1, KM2 NO contact
(Operation instruction to the motor)
Motor rotation
Lock release signal
(Safe speed detection output) ES1
Lock release switch S5
Mode selection input M1
Mode selection input M2
Enabling Switch S7
Low speed rotation
Timing Chart
S1: Emergency Stop Switch
S2: Reset switch
S3: Safety limit switch
S4: Guard lock Safety-door Switch
S5: Lock release switch
S6: A22TK Safety Key Selector Switch
S7: Enabling switch
S8: Stop signal
KM1, KM2: Contactor
M: 3-phase motor
