Omron G9SX Series Manual page 28

Wiring of Inputs and Outputs
Terminal
Signal name
name
Power supply
A1, A2
input
Safety input A,
T11, T12
channel 1
Safety input A,
T21, T22
channel 2
Safety input B,
T61, T62
channel 1
Safety input B,
T71, T72
channel 2
Feedback/reset
T31, T32, T33
input
Logical AND
T41, T42
connection input
Mode selector
M1, M2
input
Cross fault
Y1, Y2
detection inputs
External indicator
diagnosis switching Y3, Y4
inputs
Description of operation
The power supply input terminals for the G9SX-GS@.
Connect the power source to the A1 and A2 terminals.
Using Auto Switching:
For the safety output to go to the ON state, both
channels 1 and 2 of safety input A must be in the ON
state, channels 1 and 2 of safety input B must be in the
ON state.
Using Manual Switching:
For the safety output to go to the ON state when safety
input A is activated, both channels 1 and 2 of safety
input A must be in the ON state (for maintenance
mode).
For the safety output to go to the ON state when safety
input B is activated, both channels 1 and 2 of safety
input B must be in the ON state (for normal operating
mode).
For the safety output to go to the ON state, the ON state
signal must be input to T33.
Otherwise the safety outputs cannot be in the ON state.
For the safety output to go to the ON state, the signal
input to T32 must change from the OFF state to the ON
state, and then to the OFF state. Otherwise the safety
outputs cannot be in the ON state.
A logical AND connection means that one Unit (Unit A)
outputs a safety signal "a" to a subsequent Unit (Unit B)
and Unit B calculates the logical AND of "a" and safety
signal "b." In the example shown at the right, the logical
AND connection results in a safety output of "a AND b"
for Unit B.
Connect L1 of Unit A and T41 of Unit B to the power
supply negative terminal (GND) of Unit A and T42 of
Unit B.
For the safety output to go to the ON state in the
subsequent Unit, its logical AND connection preset
switch must be set to AND (enabled) and the HIGH
state signal must be input to T41 of the subsequent
Unit.
When manual switching is selected, the SPST-NO/
SPST-NC input enables the input of either safety input
A or safety input B. The relationship of the safety input
enable state and the mode selector input is as follows:
M1 = ON, M2 = OFF: Safety input B is enabled (normal
operating mode)
M1 = OFF, M2 = ON: Safety input A is enabled
(maintenance mode)
Selects the mode for the failure detecting (cross fault
detecting) function for the safety inputs of G9SX-GS@
corresponding to the connection of the cross fault
detection input.
Enables or disables error detection for the external
indicator outputs of the G9SX-GS@.
Wiring
Connect the power supply plus (24 VDC) to the A1
terminal.
Connect the power supply minus (GND) to the A2
terminal.
Using 1 safety
input channel
T11 T12 T21 T22
Using 2 safety input
channels (cross
fault detection OFF)
T11 T12 T21 T22
Using 2 safety input
channels (cross fault
detection ON) T11 T12 T21 T22
Using 1 safety
input channel
T61 T62 T71 T72
Using 2 safety input
channels (cross
fault detection OFF)
T61 T62 T71 T72
Using 2 safety input
channels (cross
fault detection ON) T61 T62 T71 T72
Auto reset
T31
Reset
Manual reset Switch
T31
Input a
Unit A
G9SX-GS@
L1 A2
Output (a)
Logical AND connection sig. (1st layer)
Input b
Unit B
T41 T42
G9SX-GS@
L1 A2
Output (a AND b)
Logical AND connection sig. (2nd layer)
T41 T42
G9SX-GS@
L1 A2
Next unit (5 layers max.)
+24 V +24 V
Mode
Safety input A
Safety input B
is enabled selector is enabled
M1 M2
Keep the circuits open when using auto
switching.
Keep Y1 open when using T11 and T21 (wiring to
enable cross fault detection).
Keep Y2 open when using T61 and T71 (wiring to
enable cross fault detection).
Connect Y1 to 24 VDC when not using T11 and
T21 (wiring to disable cross fault detection, or when
connecting safety sensors).
Connect Y2 to 24 VDC when not using T61 and
T71 (wiring to disable cross fault detection, or when
connecting safety sensors).
Keep Y3 open when detecting errors for UA.
Keep Y4 open when detecting errors for UB.
Connect Y3 to 24 VDC when not detecting errors
for UA.
Connect Y4 to 24 VDC when not detecting errors
for UB.
G9SX-GS
+24 V
+24 V
Y1
+24 V +24 V
+24 V
Y1
Open
Y1
+24 V
+24 V
Y2
+24 V +24 V
+24 V
Y2
Open
Y2
Feedback loop
KM
+24 V
T32 T33
Feedback loop
KM +24 V
T32 T33
Next unit (4 units max.)
T41 T42
G9SX-GS@
Next unit (4 units max.)
Mode
selector
M1 M2
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