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Connecting Expansion Units
• The G9SX-EX and G9SX-EX-T Expansion Units can be connected
to an Advanced Unit (G9SX-AD322-@/G9SX-ADA222-@) to
increase the number of safety outputs. (They cannot be connected
to a Basic Unit.)
• A maximum of five Expansion Units can be connected to one
Advanced Unit. This may be a combination of G9SX-EX
Instantaneous types and G9SX-EX-T OFF-delayed types.
• Remove the terminating connector from the receptacle on the
Advanced Unit and insert the Expansion Unit cable connector into
the receptacle. Insert the terminating connector into the receptacle
on the Expansion Unit at the very end (rightmost).
• When Expansion Units are connected to an Advanced Unit, make
sure that power is supplied to every Expansion Unit. (Refer to the
following diagram for actual Expansion Unit connection.)
T31
T32
T33
13
23
33
T11
T12
Y1
X1
X2
A1
G9SX-AD322-T15
G9SX-EX
24VDC
PWR
FB
PWR
T1
T2
ED
AND
EI
ED
1.5
1
2
0.7
3
0.6
4
0.5
5
ERR
0.4
7
0.3
10
0.2
0
15
No.
No.
OFF-DELAY
T21
T22
T41
T42
A2
A1
X2
S14
S24
S34
S44
S54
L1
14
24
34
Advanced Unit
Setting Procedure
1. Cross Fault Detection (Advanced Unit/
Basic Unit)
Set the cross fault detection mode for safety inputs by shorting Y1 to
24 V or leaving it open. When cross fault detection is set to ON,
short-circuit failures are detected between safety inputs T11-T12 and
T21-22. When a cross fault is detected, the following will occur.
1. The safety outputs and logical AND outputs lock out.
2. The LED error indicator is lit.
3. The error output (auxiliary output) turns ON.
Cross fault
detection
OFF
Corresponds to
Safety Category 2
Corresponds to
Safety Category 3
ON
Corresponds to
Safety Category 4
12
Flexible Safety Unit
43
13
23
33
43
13
23
33
43
13
23
33
43
13
23
33
43
G9SX-EX
G9SX-EX
G9SX-EX
G9SX-EX
24VDC
24VDC
24VDC
24VDC
PWR
PWR
PWR
PWR
ED
ED
ED
ED
Terminating
connector
No.
No.
No.
No.
A2
A1
X2
A2
A1
X2
A2
A1
X2
A2
A1
X2
A2
44
14
24
34
44
14
24
34
44
14
24
34
44
14
24
34
44
Expansion Unit
Wiring
+24 V
+24 V
T11
T12
T21
T22
Y1
+24 V
+24 V
+24 V
T11
T12
T21
T22
Y1
T11
T12
T21
T22
Y1
G9SX
2. Reset Mode (Advanced Unit/Basic Unit)
Set the reset mode using feedback/reset input terminals T31, T32,
and T33.
Auto reset mode is selected when terminal T32 is shorted to 24 V
and manual reset mode is selected when terminal T33 is shorted to
24 V.
Auto reset mode
KM1
KM2
KM3
KM4
+24 V
KM5
T31
T32
T33
3. Setting Logical AND Connection
(Advanced Unit)
When connecting two or more Advanced Units (or Basic Units) by
logical AND connection, set the logical AND connection preset
switch on the Advanced Unit that is on the input side (Advanced Unit
G9SX-AD322 in the following diagram) to AND.
(1) Using G9SX-AD322 on the Input Side
Advanced Unit A
L1
A2
T41
T42
Advanced Unit
G9SX-AD322
Note: 1. A setting error will occur and Advanced Unit G9SX-AD322
will lock out if the logical AND setting switch on the Unit is
set to OFF.
2. Set the logical AND setting switch on Advanced Unit A to
OFF or an error will occur.
3. A logical AND input cannot be sent to a Basic Unit.
Manual reset mode
KM1
Reset
KM2
switch
KM3
KM4
+24 V
KM5
T31
T32
T33
AND
OFF
AND
OFF
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