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3.2 Q Series Safety Relay Module Specifications
3.2.1 QS90SR2SP-Q Q series safety relay module
3
SPECIFICATIONS
 * 3: When connecting an electromagnetic switch and such for output, connect its normally closed 
contacts in series between XS0 and XS1.
 * 4: Do not connect equipment other than a switch or sensor to each terminal of X0, X1, XS0, and XS1.
 * 5: Common terminals for X0 and X1 differ. Connect X0 to COM0.
 * 6: Common terminals for X0 and X1 differ. Connect X1 to COM1.
Table 3.2 Performance specifications of QS90SR2SP-Q (2/2)
External connection diagram
Connector
Pin 
number
Signal name
Module power 
supply part
1
+24V
2
3
24G
4
5
FG
Extension 
communication 
part
1
EA
2
EB
3
EG
4
SLD
5
EP
Safety input 
part
1
+24V (SAFETY)
2
24G (SAFETY)
3
XS0
*3*4
4
XS1
*3*4
5
COM0
*5
6
X0
*4
7
COM1
*6
8
X1
*4
Safety output 
part
1
Z00
2
Z01
3
Z10
4
Z11
5
Z20
6
Z21
Safety relay
Z21
M
Z20
Z11
Z10
Z01
MC0
MC1
Z00
Motor
EP
SLD
EG
EB
EA
COM1
X1
X0
24G
(SAFETY)
+24V
(SAFETY)
24VDC (Safety 
power supply)
24VDC (Module 
power supply)
COM0
24V IN
0V IN
Control 
output 2
Control 
output 1
XS1
XS0
MC0
MC1
Start-up 
switch
24G
+24V
FG
K1
K0
Internal 
safety circuit
24VDC
TH
0.9A
Fuse
5A
TH
0.9A
Fuse
5A
Monitor 
circuit
Q bus 
I/F 
circuit
GND
DC/DC
Safety light curtain
OUT
Safety circuit part 
extension cable 
or 
safety part terminating 
connector
Connected to an 
extension module