A22TK
9
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
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
PL/safety category
Model
Stop category
Reset
PLe/4 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
Safety Guard Switching Unit G9SX-GS226-T15
Flexible Safety Unit G9SX-BC202 (24 VDC)
−
−
KM4
KM3
+24V
M2
KM4
KM3
KM4
KM3
PLC etc.
Open
Open
Open
Open
Feedback loop
S14
A2
S24 S44 S54
L1
X3
X2
X1
X4
T11
A1
T12 T21
Y1
Y3
T22
T61 T62
M1 M2
T71
Y2
Y4
T72
T31 T32 T33
T41
T42
OFF
AND
Auto
Manual
G9SX-GS226-T15
(Unit 2)
Control circuit
(2)
(1)
(4)
(3)
S3
S7
+24V
GND
S14
A2
S24
L1 L2
X1 X2
T11
A1
T12 T21 T22 T31 T32 T33 Y1
KM2
KM1
S2
12
11
21
22
+24V
KM1 KM2
M1
KM2
KM1
PLC etc.
S1
+24V
Open
Feedback loop
Emergency Stop
Switch
Guard lock
Safety-door Switch
G9SX-BC202
(Unit 1)
Control circuit
GND
Indicator
(Diagnostic check enabled)
Indicator
(Diagnostic check enabled)
Enabling
Switch
S4
OPEN
S5
KM3
KM4
41
42
11
12
Stop signal
Guard
Lock release signal
S6
UA
UB
+24V
Selector Switch
A22TK
S8
<
G9SX-BC202(Unit 1)
>
Reset switch S2
KM1, KM2
NC contact
KM1, KM2
NO contact
KM3, KM4
NC contact
KM3, KM4
NO contact
Unit 1
Logical AND output L1
Unit 2
Logical AND input T41
Lock release
switch
Emergency
Stop Switch S1
Guard lock
safety-door switch
S4
Mode selection
input M2
Mode selection
input M1
Reset switch S7
Enabling Switch S3
S5
Unit 1 S14, S24
(10)
(8)
(3)
(6)
(4)
(1)
Unit 2 S14, S24
(2)
(7)
(5)
(9)
<
G9SX-GS226-T15(Unit 2)
>
Timing Chart
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
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.
