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Safety Monitoring Relay
Selecting the Proper Monitoring Relay for Your Application

Safety monitoring relays range in function from two-hand palm butto control to dual channel input units with time-delayed outputs that provide conformity to ANSI B11.19-2003, Section 6 for Performance of the Safety Related Function(s).

The following questions and charts will guide you from the various capabilities and features to the proper model number.
Does the application require two dual channel inputs?
Yes: See Chart Below
No: Go to Question 2

Outputs

Operating Voltage

Safety

Aux.

Solid
State

Safety Delayed

24

24

120

200

230

Relay Model

Terminals

Inputs*

N/O

N/C

Aux.

N/O

N/C

DC

AC

AC

AC

AC

Safety Monitoring Relays

SR131A

Fixed

(2) 1 N/C + 1 N/O

2

-

2

-

-

-

-

 -

-

SR231A

Removable

(2) 1 N/C + 1 N/O

2

-

2

-

-

-

-

 -

-

Does the application require one single channel or one dual channel input?
Yes: See Chart Below
No: Go to Question 3

Outputs

Operating Voltage

Safety

Aux.

Solid
State

Safety Delayed

24

24

120

200

230

Relay Model

Terminals

Inputs*

N/O

N/C

Aux.

N/O

N/C

DC

AC

AC

AC

AC

Safety Monitoring Relays

G9SB-3010

Fixed

1 N/C, Supply Voltage

3

1

-

-

-

-

-

 -

-

SR101A

Fixed

1 N/C, Supply Voltage

2

-

-

-

-

-

CS1W-SF200 Fixed 1 N/C, 2 N/C 2 - - - - - - - -
CQM1-SF200 Fixed 1 N/C, 2 N/C 2 - - - - - - - -
G9S-301 Fixed 1 N/C, 2 N/C 3 1 - - -
G9S-501 Fixed 1 N/C, 2 N/C 5 1 - - -
G9SA-3011 Fixed 1 N/C, 2 N/C, PNP 3 1 - - - -
G9SA-5011 Fixed 1 N/C, 2 N/C, PNP 5 1 - - -
G9SB-2002 Fixed 1 N/C, 2 N/C, PNP 2 - - - - - - -
G9SB-3012 Fixed 1 N/C, 2 N/C, PNP 3 1 - - - - - -
SR102AM Fixed 1 N/C, 2 N/C, PNP 2 - - - - -
SR103AM Fixed 1 N/C, 2 N/C, PNP 3 1 - - - -
G9S-2002 Fixed 2 N/C 2 - - - - - - - -
G9SB-20022 Fixed 2 N/C 2 - - - - - - -
G9SB-30122 Fixed 2 N/C 3 1 - - - - - -
SR201A Removable 1 N/C, Supply Voltage 3 - 1 - - -
SR202AM Removable 1 N/C, 2 N/C 3 - - - - - - -
SR203M/AM Removable 1 N/C, 2 N/C, PNP 3 1 - - - -

Does the application require the ability to accept input from a variety of safety devices such as E-stops, interlocks or light curtains?
Yes: See Chart Below
No: Go to Question 4

Outputs1 N/C, 2 N/C, SM, SR130DD Fixed PNP (2 total)

Operating Voltage

Safety

Aux.

Solid
State

Safety Delayed

24

24

120

200

230

Relay Model

Terminals

Inputs*

N/O

N/C

Aux.

N/O

N/C

DC

AC

AC

AC

AC

Multi-Input Safety Monitoring Relays

SR120MP

Fixed

1 N/C, 2 N/C, SM, PNP

3

1

4

-

-

-

SR126AM

Fixed

1 N/C, 2 N/C, PNP

7

2

4

-

-

-

SR130DD

Fixed

 1 N/C, 2 N/C, SM, PNP (2 total) 6 - 3 - - - - - -
SR220MP

Removable

 1 N/C, 2 N/C, SM, PNP 3 1 4 - - -
SR226AM

Removable

 1 N/C, 2 N/C, PNP 7 2 4 - - -
SR230DD

Removable

 1 N/C, 2 N/C, SM, PNP (2 total) 6 - 3 - - - - - -

Does the application require single or dual channel inputs with 2 or 3 delayed safety outputs?
Yes: See Chart Below
No: Go to Question 5

Outputs

Operating Voltage

Safety

Aux.

Solid
State

Safety Delayed

24

24

120

200

230

Relay Model

Terminals

Inputs*

N/O

N/C

Aux.

N/O

N/C

DC

AC

AC

AC

AC

Safety Monitoring Relays With Delayed Outputs

G9S-321

Fixed

1 N/C, 2 N/C

3

-

-

2

-

G9SA-3211

Fixed

1 N/C, 2 N/C, PNP

3

1

-

2

-

-

SR107AD

Fixed

 1 N/C, 2 N/C, PNP 1 - - 3 - - - -
SR108AD

Fixed

 1 N/C, 2 N/C, PNP 2 - - 2 - - - -
SR109AD

Fixed

 1 N/C, 2 N/C, PNP 3 - - 1 - - - -
SR208AD

Removable

 1 N/C, 2 N/C, PNP 2 - - 3 - -
SR209AD

Removable

 1 N/C, 2 N/C, PNP 2 - - 2 1 -

Does the application require the monitoring of two-hand palm buttons?
Yes: See Chart Below
No: Go to Question 6

Outputs

Operating Voltage

Safety

Aux.

Solid
State

Safety Delayed

24

24

120

200

230

Relay Model

Terminals

Inputs*

N/O

N/C

Aux.

N/O

N/C

DC

AC

AC

AC

AC

Two Hand Controls

G9SA-TH3011

Fixed

2 N/C

3

1

-

-

-

-

SR104P

Fixed

 1 N/C + 1 N/O 2 - - - - - -

SR204P

Removable

1 N/C + 1 N/O

2

-

-

-

-

-

-


Does the application require an expansion module?
Yes: See Chart Below
No: Go to Question 7

Outputs

Operating Voltage
Solid State Safety

Safety

Aux.

Safety

Delayed

24

24

120

230

Relay Model

Terminals

Inputs*

N/O

N/C

 Safety

Aux.

 Delayed

N/O

N/C

DC

AC

AC

AC

Expansion Units

G9SA-EX031

Fixed

Dedicated

-

-

 -

-

 -

3

1

-

-

-

-
G9SA-EX301

Fixed

 Dedicated 3 1 - - - - - - - - -
SR105E

Fixed

 1 N/C, PNP 3 1 - - - - -
SR106ED

Fixed

 1 N/C, PNP - 1 - - - 3 -
SR121E

Fixed

 2 N/C 4 1 - 1 - - -
SR122E

Fixed

 2 N/C 8 1 - 1 - - -
G9SX-EX041

Removable

Dedicated

 - - - 1 - 4 - - - -

G9SX-EX401

Removable

Dedicated

4

-

 -

1

 -

-

-

-

-

-

Does the application require stop motion sensing or time "on-delay" after initiation of stop command?
Yes: See Chart Below
No: Go to Question 8

Outputs

Operating Voltage
Solid State Safety



Safety

Aux.


Safety

Delayed

24

24

120

230

Relay Model

Terminals

Inputs*

N/O

N/C

 Safety

Aux.

 Delayed

N/O

N/C

DC

AC

AC

AC

Stop Motion Sensing Units

SR125SMS

Fixed

Back EMF

1 N/O, 1 N/C

-

 -

2

 -

-

-

-

SR223SMT

Removable

 Time Delay - - - 2 - 1 2
SR224SMT

Removable

 Time Delay - - - 2 - 1 2

Does the application require a modular safety system?
Yes: See Chart Below
No: Go to Question 9

Outputs

Operating Voltage
Solid State Safety

Safety

Aux.

Safety

Delayed

24

24

120

230

Relay Model

Terminals

Inputs*

N/O

N/C

 Safety

Aux.

 Delayed

N/O

N/C

DC

AC

AC

AC

Modular Safety Relays

F3SX3

Removable

Configurable

0 to 2

0 to 1

 0 to 2

0 to 1

 0 to 2

0 to 2

0 to 1

-

-

-
G9SX-ADA2221

Removable

 1 N/C, 2 N/C, PNP - - 2 2 2 - - - - -
G9SX-AD3221

Removable

 1 N/C, 2 N/C, PNP - - 3 2 2 - - - - -
G9SX-BC202

Removable

 1 N/C, 2 N/C, PNP - - 2 2 - - - - - -

Does the application require a programmable controller with safety networking capability?
Yes: See Chart Below
No: Go to Question 10

Controller Model

Terminals

Safety Inputs
(PNP)

Safety Outputs
(PNP)

Test Outputs
(PNP)

 Safety
Network

Operating
Voltage.

 Compatible
I/O Terminals

Programmable Safety Network Controllers

NE1A-SCPU01-V1

Removable

16

8

4

 DeviceNet Safety

24 VDC

 DST 1 Series
NE1A-SCPU02

Removable

 40 8 8 DeviceNet Safety 24 VDC DST 1 Series
Safety Network I/O Terminals
DST1-ID12SL-1

Removable

 12 - 4 DeviceNet Safety 24 VDC DST 1 Series
DST1-MD16SL-1

Removable

 8 8 4 DeviceNet Safety 24 VDC DST 1 Series
DST1-MRD08SL-1

Removable

 4 4 (relay) 4 DeviceNet Safety 24 VDC DST 1 Series

Does the application require the muting of safety light curtains?
Yes: See Chart Below
No: Contact Omron STI
Light Muting Test Outputs Operating

Controller Model

Terminals

Curtains

Sensors

Safety N/O

 Aux. N/O

Voltage.

Safety Sensor Muting Controller

F3SP-U2P

Fixed

2

8

2

 -

24 VDC
RM-3

Removable

 2 8 2** 3 24 VDC

Notes:
1 Dedicated expansion module available = Available
2 Must specify manual or auto restart = Available on special order
3 Unit must be configured at factory * Codes: SM = 4-wire safety mat, PNP = light curtain, 2H = two-hand control


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OMRON
Scientific Technologies, Inc.
6550 Dumbarton Circle
Fremont, CA 94555 USA
Tel: 888-510-4357
Tel: 510-608-3400
Fax: 510-744-1442
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