
Safety Relay Unit
G9SB
Ultra Slim Safety
Relay Unit
• Models of width 17.5 mm available with
2 or 3 safety contacts. Models of width
22.5 mm with 3 safety contacts and
auxiliary contact are also available.
• Conforms to EN standards.
(TÜV approval)
• DIN track mounting possible.
• Slim size controller dedicated for safey
sensors F3SN, F3SH, F3S-B, F3STGR, F3SL, F3S-J
Ordering Information
Main contacts
DPST-NO
2 safety
contacts
3PST-NO
3 safety
contacts
Auxiliary
contact
None
SPST-NC
Number of input
channels
2 channels
1 channel or
2 channels
2 channels
1 channel or
2 channels
None
(direct breaking)
2 channels Inverse
1 channel or
2 channels
2 channels
1 channel or
2 channels
Model Number Legend
G9SB-##### #
1 2 3 4 5 6
1. Function
None: Emergency stop
2. Contact Configuration (Safety Output)
2: DPST-NO
3: 3PST-NO
3. Contact Configuration (OFF-delay Output)
0: None
4. Contact Configuration (Auxiliary Output)
0: None
1: SPST-NC
Reset mode Input type
Inverse
Auto-reset
Manual-reset
Auto-reset
Manual-reset
+ common G9SB-200-B
Inverse G9SB-2002-C
+ common G9SB-200-D
--- 24 VDC G9SB-3010 3 17.5 mm
+ common G9SB-301-B
Inverse G9SB-3012-C
+ common G9SB-301-D
Rated
voltage
24 VAC/VDC
24 VAC/VDC
5. Input Configuration
None: 1-channel or 2-channel input possible
0: None (direct breaking)
2: 2-channel input
6. Miscellaneous
A: Auto-reset, inverse input
B: Auto-reset, + common input
C: Manual-reset, inverse input
D: Manual-reset, + common input
Model
G9SB-2002-A
4 17.5 mm
G9SB-3012-A
4 22.5 mm
Category
(EN954-1)
Size
G9SB
G-123G9SB

Specifications
Ratings
Power Input
Item G9SB-200#-# G9SB-3010 G9SB-301#-#
Power supply voltage
Operating voltage range 85% to 110% of rated power supply voltage
Power consumption 1.4 VA/1.4 W max. 1.7 W max. 1.7 VA/1.7 W max.
Inputs
Item G9SB-200#-# G9SB-3010 G9SB-301#-#
Input current 25 mA max. 60 mA max. (See note.) 30 mA max.
Note: Indicates the current between terminals A1 and A2.
Contacts
Item
Rated load 250 VAC, 5 A
Rated carry current 5 A
Characteristics
Contact resistance (See note 1.) 100 mΩ
Operating time (See note 2.) 30 ms max.
Response time (See notes 2 and 3.) 10 ms max.
Insulation resistance (See note 4.) 100 MΩ min. (at 500 VDC)
Dielectric strength
Vibration resistance 10 to 55 to 10 Hz, 0.375-mm single amplitude (0.75-mm double amplitude)
Shock resistance
Durability
Minimum permissable load
(reference value)
Ambient operating temperature -25 to 55°C (with no icing or condensation)
Ambient operating humidity 35% to 85%
Terminal tightening torque 0.5 N·m
Weight Approx. 115 g Approx. 135 g Approx. 120 g
Approved standards EN954-1, EN60204-1, UL508, CSA C22.2 No. 14
EMC
24 VAC/VDC: 24 VAC, 50/60 Hz, or 24VDC
24 VDC: 24 VDC
G9SB-200#-# G9SB-3010 G9SB-301#-#
Resistive load (cos =1)
Item G9SB-200#-# G9SB-3010 G9SB-301#-#
Between different
outputs
Between inputs
and outputs
Between power inputs and outputs
Destruction 300 m/s
Malfunction 100 m/s
Mechanical 5,000,000 operations min. (at approx. 7,200 operations/hr)
Electrical 100,000 operations min. (at approx. 1,800 operations/hr)
2,500 VAC, 50/60 Hz for 1 min
2
2
5 VDC, 1 mA
EMI: EN55011 group 1 class A
EMS: EN50082-2
Note: 1. The contact resistance was measured with 1 A at 5 VDC using the voltage-drop method.
2. The bounce time is not included in the figure for operating time.
3. The response time is the time it takes for the main contact to open after the input is turned OFF.
4. The insulation resistance was measured with 500 VDC at the same places that the dielectric strength was checked.
G-124 Safety Sensors / Components

Application Examples
G9SB-2002-A (24 VAC/VDC) or G9SB-3012-A (24 VAC/VDC) with 2-channel Limit Switch Input/Auto-reset
Timing Chart
Limit switches S1 and S2
K1 and K2 (NC)
K1 and K2 (NO)
KM1 and KM2 (NC)
KM1 and KM2 (NO)
Open
23
S2
24
11
S1
12
KM1
KM2
Feedback loop
A1 A2
T11 T12 T31 T32
+
-
K1
TH
SA
T21
K1
a
K2
K2
T22
K2 K1
Control
a
circuit
K1
K2
13 23
14 24
KM1
KM2
**
33 41
34 42
**
See note.
KM1
KM2
S1: Safety limit switch with direct
S2: Limit switch
KM1 and KM2: Magnetic Contactor
M: 3-phase motor
Note: Only the G9SB-3012-A
opening mechanism (D4N or
D4B)
model has terminals 33-34
and 41-42.
M
Note: 1. External connections and timing charts for G9SB-200-B/301-B models are the same as those for G9SB-2002-A/3012-A models.
2. This circuit conforms to EN954-1 Safety Category 4.
G9SB-2002-C (24 VAC/VDC) or G9SB-3012-C (24 VAC/VDC)
with 2-channel Emergency Stop Switch Input/Manual-reset
S1
21
22
A1 A2
+
TH
SA
11
12
T11
T12 T31 T32
-
K1
K1
T21
a
K2
K2
T22
S2
K2 K1
Control
a
circuit
KM1
KM2
Feedback loop
K1
K2
13 23
14 24
KM1
KM2
*
*
33 41
34 42
**
See note.
Note: 1. External connections and timing charts for G9SB-200-D/301-D models are the same as those for G9SB-2002-C/3012-D models.
2. This circuit conforms to EN954-1 Safety Category 4.
Timing Chart
Emergency stop switch S1
Reset switch S2
K1 and K2 (NC)
K1 and K2 (NO)
KM1
KM2
M
KM1 and
KM2 (NC)
KM1 and
KM2 (NO)
Note: Output turns ON with the ri-
sing edge of reset switch S2,
but will not operate if there is
a short breakdown in S2.
S1: Emergency stop switch with
S2: Reset switch
KM1 and KM2: Magnetic Contactor
M: 3-phase motor
direct opening mechanism
(A165E, A22E)
Note: Only the G9SB-3012-C model
has terminals 33-34 and 41-
42.
G9SB
G-125G9SB