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A22TK
Application Examples
●Application Overview
• Switching between normal operation mode and maintenance mode is performed manually.
• In normal operation mode, the power supply to the motor M2 is turned OFF when the guard is opened.
• In maintenance mode, the power supply to the motor M2 is turned OFF when the enabling switch is released or strongly gripped.
• In normal operation mode and maintenance mode, the power supply to the motor M1 and M2 is turned OFF when the emergency stop switch is pressed.
●Evaluation example
PL/safety category
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)
PLe/4 equivalent
Enabling Grip Switch A4EG
Safety Guard Switching Unit G9SX-GS226-T15
Flexible Safety Unit G9SX-BC202 (24 VDC)
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.
●Circuit Diagram
Lock release signal
S3
Enabling
Switch
(2)
(4)
(1)
(3)
S8
Selector Switch
A22TK
Open
A1
T11
T12 T21
T22
Y1
G9SX-GS226-T15
+24V
Control circuit
A2
S14
S24 S44 S54
KM3
KM4
GND
Timing Chart
<
>
G9SX-BC202(Unit 1)
Emergency
Stop Switch S1
Reset switch S2
Unit 1 S14, S24
KM1, KM2
NC contact
KM1, KM2
NO contact
Unit 1
Logical AND output L1
<
>
G9SX-GS226-T15(Unit 2)
Unit 2
Logical AND input T41
(3)
Lock release
S5
switch
Guard lock
S4
safety-door switch
(4)
Enabling Switch S3
(1)
(5)
Reset switch S7
(2)
Mode selection
input M1
Mode selection
input M2
Unit 2 S14, S24
KM3, KM4
NC contact
KM3, KM4
NO contact
9
Model
KM3
KM4
S4
S5
41
Guard lock
Safety-door Switch
42
11
12
Guard
S6
OPEN
Stop signal
+24V
Open
Open
Open
Y3
M1 M2
T61 T62
T71
T72
Y2
Y4
(Unit 2)
L1
X1
X2
X3
X4
UA
UB
PLC etc.
Indicator
Indicator
(Diagnostic check enabled)
(Diagnostic check enabled)
(8)
(6)
(7)
(9)
Emergency Stop
Switch
S1
A1
T11
G9SX-BC202
+24V
A2
S14
Feedback loop
KM1 KM2
KM3
GND
S7
KM4
+24V
AND
T31 T32 T33
T41 T42
OFF
Manual
KM3
Auto
KM4
(10)
Stop category
−
Feedback loop
11
21
KM1
12
22
KM2
KM1
S2
+24V
Open
KM2
T12 T21 T22 T31 T32 T33 Y1
M1
(Unit 1)
Control circuit
S24
L1 L2
X1 X2
PLC etc.
S1: Emergency Stop Switch
S2, S7: Reset switches
S3: Enabling Switch
S4: Guard lock Safety-door Switch
S5: Lock release switch
S6: Safety limit switch
S8: A22TK Safety Key Selector
Switch
M2
KM1 to KM4: Contactors
M1 to M2: 3-phase motor
(1) The G9SX-GS starts in operation mode.
(2) The mode switches to maintenance
mode.
(3) The operator opens the guard and
performs maintenance work.
(4) The Enabling Switch is gripped to the
middle position.
(5) The G9SX-GS starts in maintenance
mode.
(6) The G9SX-GS will stop when the
Enabling Switch is released or gripped.
(7) The G9SX-GS will start again after the
guard is closed and the mode is
switched to operation mode.
(8) The G9SX-GS will stop and the guard
can be opened when the stop signal is
input while in operation mode.
(9) The guard is closed and the G9SX-GS
starts again.
(10)All the units will stop if the emergency
stop is pressed.
Reset
−
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