G9S
2
Safety Relay Unit
Ideal for Safety Door and Emergency
Stop Switch Circuits
HThree-pole models are only 67.5 mm wide;
five-pole models only 90 mm wide are
available
HOFF-delay feature models available
HIncorporates LED indicators for monitoring
built-in relays
HFinger-protection construction
HDIN-track mounting
HConforms to EN60204-1 (IEC60204-1),
EN954-1, and approved by BIA
Note: BesuretorefertothePrecautions Section.
Ordering Information
JBASIC MODELS
Number of poles Main contact
form
Number of input channels Category Rated voltage Part number
3(SeeNote) 3PST-NO 1 channel or 2 channels
i
b
l
424 VDC G9S-301
(
)
possible 24 VAC
100 VAC
120 VAC
200 VAC
240 VAC
5(SeeNote) 5PST-NO 24 VDC G9S-501
(
)
24 VAC
100 VAC
120 VAC
200 VAC
240 VAC
Note: Auxiliary contact is SPST-NC.
JOFF-DELAY MODELS
Number of
poles
Main
contact form
OFF-delay
form
Number of input
channels
Category OFF-delay
time
Rated
voltage
Part number
33PST-NO DPST-NO 1 channel or 2
h
l
i
b
l
31s,1.5s,
3
4
5
24 VDC G9S-321-T01, -T015,
T
0
3
T
0
4
T
0
5
T
0
6
channels possible
,
,
3s,4s,5s,
6
s
1
0
s
3
0
24 VAC
,
,
-T03, -T04, -T05, -T06,
-
T
1
0
-
T
3
0
6
s,
1
0
s,
3
0
s100 VAC -
T
1
0
,-
T
3
0
s
120 VAC
200 VAC
240 VAC
Rated voltage
Note: Each model has an SPST-NC auxiliary contact.
When ordering, specify the voltage.
Example: G9S-301 24 VDC
G9S
3
JMODEL NUMBER LEGEND
G9S-jjj-jjj
123 4
1. Contact Configuration (Safety Output)
3: 3PST-NO
5: 5PST-NO
2. Contact Configuration (OFF-delay Output)
0: None
2: DPST-ND
3. Contact Configuration (Auxiliary Output)
0: None
1: SPST-NC
4. OFF-Delay Time
None: No OFF-delay
T01: 1 second
T015: 1.5 seconds
T03: 3 seconds
T04: 4 seconds
T05: 5 seconds
T06: 6 seconds
T10: 10 seconds
T30: 30 seconds
Specifications
JRATINGS
Controller Block
Model Rated
voltage
Rated current Rated power
consumption
G9S-301 24 VDC 62.5 mA±20% Approx. 1.5 W
24 VAC 125 mA±20% Approx. 3 VA
(
6
0
H
)
100 VAC 30 mA±20%
p
p
(60 Hz)
120 VAC 25.0 mA±20%
200 VAC 15 mA±20%
240 VAC 12.5 mA±20%
G9S-501 24 VDC 127 mA±20% Approx. 3 W
24 VAC 229 mA±20% Approx. 5.5 VA
(
6
0
H
)
100 VAC 55 mA±20%
p
p
(60 Hz)
120 VAC 45.8 mA±20%
200 VAC 27.5 mA±20%
240 VAC 22.9 mA±20%
G9S-321-Tj24 VDC 150 mA±20% Approx. 3.6 W
G
9
3
j
24 VAC 254 mA±20% Approx. 6.1 VA
(
6
0
H
)
100 VAC 61 mA±20%
p
p
(60 Hz)
120 VAC 50.8 mA±20%
200 VAC 30.5 mA±20%
240 VAC 25.4 mA±20%
Note: The above ratings are at an ambient temperature of 23°C.
Contact
Item G9S-301
G
9
5
0
1
G9S-501
G9S-321-Tj
Rated load 3 A at 240 VAC; (see note)
cosφ=0.4
AC15
(IEC-947-5-1/
Table 4)
3 A at 240 VAC; cosφ=0.3;
6,050 operations
DC13
(IEC-947-5-1/
Table 4)
1 A at 24 VDC; L/R=100 ms;
6,050 operations
Rated carry
current
5A
Max. switching
voltage
250 VAC, 24 VDC
Max. switching
power
AC: 1,250 VA;
DC: 120 W
Min. permissible
load
50 mA at 24 VDC
(operating frequency: 60 operations/min.)
Note: If the load is 5 A at 240 VAC, the service life will be 40,000
operations.
G9S
4
JCHARACTERISTICS
Item G9S-301 G9S-501 G9S-321-Tj
Input voltage/frequency 24 VDC; 24 VAC, 50/60 Hz; 100 VAC, 50/60 Hz; 120 VAC, 50/60 Hz;
200 VAC, 50/60 Hz; 240 VAC, 50/60 Hz
Supply voltage range 85% to 110% of rated input voltage
Fuse protection 0.4 A
Contact form of safety circuit 3PST-NO 5PST-NO 3PST-NO
Contact form of auxiliary circuit SPST-NC SPST-NC SPST-NC
Contact form of safety OFF-delay circuit —DPST-NO
Contact resistance (see note1) 300 mΩmax.
Operate time (Rated voltage operation,
d
i
l
d
b
i
)
300 ms max. 300 ms
Release time
(
g
p
,
does not include bounce time) 100 ms max. 100 ms (except
OFF-delay output)
Max. switching
f
Mechanical 1,800 operations/hr
g
frequency Rated load 1,800 operations/hr
Insulation resistance (at 500 VDC) 100 MΩmin. between control circuit and the safety and auxiliary circuits,
between the safety circuits and auxiliary circuits, and between safety circuits
Rated insulation voltage
P.D. 3 (outside), P.D. 2 (inside)
(IEC664-1, DIN VDE 0110/’89)
250 V
Rated impulse withstand voltage
Overvoltage category 3
(IEC664-1, DIN VDE 0110/’89)
4kV
Dielectric strength 2,500 VAC (50/60 Hz for 1 min.) between control circuit and the safety and
auxiliary circuits, between the safety circuits and auxiliary circuits, and
between safety circuits
Vibration resistance
(
I
C
6
8
2
6
)
Destruction 10 to 55 Hz, 0.75-mm double amplitude
(IEC68-2-6) Malfunction 10 to 55 Hz, 0.5-mm double amplitude
Shock resistance
(
I
C
6
8
2
2
7
)
Destruction 300 m/s2for 11 ms
(IEC68-2-27) Malfunction 50 m/s2for 11 ms
Min. permissible load (reference value) 24 VDC, 50 mA (24 VDC, 4 mA photocoupler load)
Ambient temperature Operating: --25°Cto55°C (with no icing or condensation)
Storage: --25°Cto85°C (with no icing or condensation)
Ambient humidity Operating: 35% to 85%
Storage: 35% to 85%
Degree of protection
(
I
C
5
2
9
)
Terminals IP20
g
p
(IEC529) Enclosure IP40
Terminal tightening torque 0.98 N Sm
Weight (see note 2) Approx. 365 g Approx. 550 g Approx. 580 g
Approved standards UL508, CSA22.2 No. 14, EN954-1, EN60204-1
EMC EMI: EN55011 group 1 class A
EMS: EN50082-2
Note: 1. Measurement conditions: 10 mA at 5 VDC using the fall-of-potential method.
2. These weights are for DC models. AC models are 200 g heavier.
G9S
5
JLIFE EXPECTANCY
Mechanical life 1,000,000 operations min. with a switching frequency of approx. 1,800 operations/h
Electrical life 100,000 operations min. at the rated load with a switching frequency of approx. 1,800 operations/h
Life Expectancy Curve
(240 VAC, cosφ=0.4)
Switching current (A)
Life expectancy (x10 operations)
4
G9S (three-pole and
five-pole models)
Application Examples
JG9S-301 (24 VDC) WITH 2-CHANNEL LIMIT SWITCH INPUT
Feedback
loop
S1: Limit switch
S2: Safety Limit Switch
with positive opening mechanism
(D4D and D4B)
S3: Starter switch
KM1 and KM2: Magnet Contactor
KM3: G3J Solid-state Contactor
M: 3-phase motor
Open
Limit switches
S1 and S2
Starter switch
S3
K3 (NC)
K3 (NO)
K1 and K2
(NC)
K1 and K2
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
PC input
PC output
KM3
Timing Chart
G9S
6
JG9S-501 (AC MODEL) WITH 2-CHANNEL LIMIT SWITCH INPUT
Feedback
loop
S1: Limit switch
S2: Safety Limit Switch
with positive opening mechanism
(D4D and D4B)
S3: Starter switch
KM1 and KM2: Magnet Contactor
M: 3-phase motor
Open
Timing Chart
Limit switches
S1 and S2
Starter switch
S3
K3 (NC)
K3 (NO)
K1 and K2
(NC)
K1 and K2
(NO)
K4 and K5
(NC)
K4 and K5
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
JG9S-321-Tj(24 VDC) WITH 2-CHANNEL LIMIT SWITCH INPUT
Feedback loop
S1: Limit switch
S2: Safety Limit Switch
with positive opening mechanism
(D4D and D4B)
S3: Starter switch
KM1 and KM2: Magnet Contactor
M: 3-phase motor
Operation
instruction Motor controller
OFF-delay
timer
Open
Timing Chart
Limit switches
S1 and S2
Starter switch
S3
K3 (NC)
K3 (NO)
K1 and K2
(NC)
K1 and K2
(NO)
K4 and K5
(NC)
K4 and K5
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
Operation
instruction
Motor rotation
OFF-delay time
G9S
7
JG9S-301 (24 VDC) WITH 2-CHANNEL EMERGENCY STOP SWITCH INPUT
Feedback
loop
S1: Emergency stop switch
S2: Starter switch
KM1 and KM2: Magnet Contactor
KM3: G3J Solid-state Contactor
M: 3-phase motor
Emergency stop
switch S1
Starter switch
S2
K3 (NC)
K3 (NO)
K1 and K2
(NC)
K1 and K2
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
PC input
PC output
KM3
Timing Chart
JG9S-301 (24 VDC) WITH 2-CHANNEL AUTO-RESET LIMIT SWITCH INPUT
Feedback
loop
S1: Limit switch
S2: Safety Limit Switch
with positive opening mechanism
(D4D and D4B)
KM1 and KM2: Magnet Contactor
M: 3-phase motor
Open
Limit switches
S1 and S2 (NC)
Limit switches
S1 and S2 (NO)
K3 (NC)
K3 (NO)
K1 and K2
(NC)
K1 and K2
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
Timing Chart
G9S
8
Dimensions
Unit: mm (inch)
JG9S-301
76 max.
(2.99)
68 max.
(2.68)
Eighteen, M3.5
92
(3.62)
111 max.
(4.37)
61.2
56
5.9
7
JG9S-321-Tj
G9S-501
91 max.
(3.58)
Twenty-four, M3.5
92
(3.62)
76 max.
(2.99)
111 max.
(4.37)
63
5.9
80
10
7
G9S
9
Installation
JINTERNAL CONNECTIONS
G9S-301 (24 VDC) G9S-301 (AC Model)
G9S-501 (24 VDC) G9S-501 (AC Model)
G9S-321-Tj(24 VDC) G9S-321-Tj(AC Model)
OFF-delay
timer
OFF-delay
timer
G9S
10
JEXTERNAL CONNECTIONS
G9S-301 Models
G9S-321 and G9S-501 Models
G9S
11
Precautions
JWIRING
Be sure to turn off the G9S before wiring. Do not touch its
terminals while the power is turned on because the terminals are
charged and may cause an electric shock.
Use the following to wire the G9S.
Strandwire: 0.75to1.5mm
216 to 18 AWG
Steel wire: 1.0 to 1.5 mm216 to 18 AWG
Tighten each screw to a torque of 0.78 to 1.18 NSm(8to
12 kgfScm), or the G9S may malfunction or generate heat.
External inputs connected to T11 and T12 or T21 and T22 of the
G9S-301 must be no-voltage contact inputs.
PE is a ground terminal.
When a machine is grounded at the positive, the PE terminal
should not be grounded.
JMOUNTING MULTIPLE UNITS
If the output current is 3 A or more, make sure that there is a
minimum distance of 50 mm (1.97 in) each between all adjacent
G9S Units. (24-VDC models do not require this spacing.)
50 mm min.
(1.97)
JFUSE REPLACEMENT
Three- and Five-Pole Models
The power input circuit of the G9S includes a fuse to protect the it
from damage that may be caused by short-circuiting. The fuse is
mounted to the side panel. Use the following type of fuse as a
replacement.
Littel Fuse 218.4 (rated current 0.4 A), IEC127 approval.
Use a flat-blade screwdriver to remove the fuse cover.
Be sure to turn off the G9S before replacing the fuse.
Fuse
JAPPLICABLE SAFETY CATEGORY
(EN954-1)
All G9S-series Relays fall under Safety Category 4 of EN954-1
except the G9S-321-T. The G9S-321-T has an OFF-delay output
block falling under Safety Category 3.
The above is provided according to circuit examples presented
by OMRON. Therefore, the above may not apply to all operating
environments.
The applicable safety category is determined from the whole
safety control system. Make sure that the whole safety control
system meets EN954-1 requirements.
Safety Category 4 of EN954-1
Apply 2-channel external input to the T11 and T12 terminals and
T21 and T22 terminals through switches each incorporating a
force-separation mechanism. If limit switches are used, make
sure that at least one of them incorporates a force-separation
mechanism.
Refer to Application Examples and input a signal for the
normally-closed contact of the contactor (i.e., input to X1 of the
G9S-301, X2 of the G9S-501, or X2 of the G9S-321-T).
Be sure to ground the PE terminal. If the relay is operating with
DC, the power supply may be grounded instead.
OMRON ON-LINE
Global - http://www.omron.com
USA - http://www.omron.com/oei
Canada - http://www.omron.ca
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, divide by 25.4
Cat. No. GC SAFETY-2 Printed in USA
OMRON CANADA, INC.
885 Milner Avenue
Toronto, Ontario M1B 5V8
416-286-6465
OMRON ELECTRONICS LLC
One Commerce Drive
Schaumburg, IL 60173
847-843-7900
For US technical support or other inquiries:
800-556-6766
2/03 Specifications subject to change without notice
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Omron:
G6D4SB G79Y100C G9S-2002 DC24 G9S-2001 DC24 G9S-301 AC100 G9S-301 AC120 G9S-301 AC200 G9S-
301 AC24 G9S-301 AC240 G9S-301 DC24 G9S-321-T015 DC24 G9S-321-T01 AC100 G9S-321-T01 AC120 G9S-
321-T01 AC200 G9S-321-T01 AC24 G9S-321-T01 AC240 G9S-321-T01 DC24 G9S-321-T03 DC24 G9S-321-T04
DC24 G9S-321-T10 AC100 G9S-321-T10 AC120 G9S-321-T10 AC200 G9S-321-T10 AC24 G9S-321-T10 AC240
G9S-321-T10 DC24 G9S-321-T30 AC100 G9S-321-T30 AC120 G9S-321-T30 AC200 G9S-321-T30 AC24 G9S-321-
T30 AC240 G9S-321-T30 DC24 G9S-501 AC100 G9S-501 AC120 G9S-501 AC200 G9S-501 AC24 G9S-501
AC240 G9S-501 DC24 G9SA-321-T075 G9SA-321-T30 AC100-240