background image

(1) Handle with care

Do not drop G9SX to the ground or expose to excessive vibration or mechanical 

shocks. G9SX may be damaged and may not function properly.

(2) Conditions of storage

Do not store in such conditions stated below.

1) In direct sunlight

2) At ambient temperatures out of the range of -10 to 55 

ºC

3) At relative humidity out of the range of 25% to 85% or under 

such temperature change that causes condensation.

4) In corrosive or combustible gases

5) With vibration or mechanical shocks out of the rated values.

6) Under splashing of water, oil, chemicals

7) In the atmosphere containing dust, saline or metal powder.

G9SX may be damaged and may not function properly.

(3) Mounting

Mount G9SX to DIN rails with attachments (TYPE PFP-M, not 

incorporated to this product), not to drop out of rails by vibration 

etc. especially when the length of DIN railing is short compared to 

the widths of G9SX.

(4) Following spacing around G9SX should be available to apply rated 

current to outputs of G9SX and for enough ventilation and wiring:

a) At least 25 mm beside side faces of G9SX.

b) At least 50 mm above top face of G9SX and below bottom face of G9SX.

(5) Wiring

1) For model G9SX-

Use the following to wire to G9SX-

.

-Solid wire: 0.2 to 2.5mm2 AWG24 to AWG12

-Stranded wire (Flexible wire): 0.2 to 2.5mm

2

 AWG24 to AWG12

Strip the cover of wire no longer than 7mm.

2) For model G9SX-

-RT (with screw terminals)

Tighten each screw with a specified torque of 0.5 to 0.6N

·

m, or the

G9SX-

 may malfunction or generate heat.

3) For Logical AND Connection

Use VCTF cable or shielded cable for Logical AND connection 

between units.

(6) When connecting Expansion Units (G9SX-EX

-

) to Advanced Unit:

1) Follow the procedure below:

a) Remove the termination connector from the receptacle on 

Advanced Unit,

b) Insert the head of the connecting cable of Expansion Unit to 

the receptacle on the Advanced Unit 

c) Set the termination connector to the receptacle on the 

Expansion Unit at the end position. When Advanced Unit is 

used without expansion units, leave the termination connector 

set on the Advanced Unit.

2) Do not remove the termination connecter while the system is operating.

3) Before applying supply voltage, confirm that the connecting 

sockets and plugs are locked firmly.

4) All of the Expansion Units should be supplied with its specified 

voltages within 10s after the connected Advanced Unit is 

supplied with voltage.

Otherwise, Advanced Unit detects the power-supply error for 

the Expansion Units.

(7) Use cables with length less than 100m to connect to Safety Inputs, 

Feed-back/Reset inputs, or between Logical AND connection 

inputs and Logical connection outputs,respectively. 

(8) Set the time duration of OFF-delay to an appropriate value that 

does not cause the loss of safety function of system.

(9) Logical connection between Units:

1) When using Logical AND connection inputs, set the Logical 

connection preset switch to 'AND' position for the units which 

the logical connection signal are input to.

2) Connect Logical connection outputs appropriately to Logical 

AND connection inputs of the relevant unit. Verify the operation 

of G9SX before commissioning the system.

3) When configuring the safety related system, be sure to 

consider that the delay of response time caused by logical 

connections do not degrade the safety function of the system.

(10) To determine safety distance to hazards, take into account the 

delay of Safety outputs caused by the following time:

1) Response time of Safety inputs

2) Response time of Logical AND connection input

(See also "Ratings and specifications, note5")

3) Preset  off-delay time

4) Accuracy of off-delay time

(11) Start entire system after more than 5s have passed since 

applying supply voltage to all G9SXs in the system.

(12) G9SX may malfunction due to electro-magnetic disturbances. 

Be sure to connect the terminal A2 to ground.

When using a DC power supply with light curtains, use DC power 

supply which has no interruption by a power failure of 20ms.

(13) Devices connected to G9SX may operate unexpectedly. 

When replacing G9SX, disconnect it from power supply.

(14) Adhesion of solvent such as alcohol, thinner, trichloroethane or 

gasoline on the product should be avoided. Such solvents make 

the marking on G9SX illegible and cause deterioration of parts.

(15)This is a class A product. In residential areas it may cause radio 

interference, in which case the user may be required to take 

adequate measures to reduce interference.

(16) Operate the reset input more than 0.4 seconds immediately after 

the safety outputs are OFF.

G9SX does not accept the reset input from when the outputs are 

turned ON and until 0.4 seconds passes after the outputs are 

turned OFF.

Name

Logical AND1 

Connection 

Preset Switch

Logical AND2 

Connection 

Preset Switch

Off-delay Time 

Preset Switch

Function

Sets Logical AND1 

Connection Inputs to 

valid or invalid. (*2)

Sets Logical AND2 

Connection Inputs to 

valid or invalid. (*2)

Presets Off-delay time

(duplicate) (*3), (*4)

State/Value (position of switch)

OFF (Invalid: default setting)/

AND1 (valid)

OFF (Invalid: default setting)/

AND2 (valid)

For Type G9SX-ADA222-T150-

0 (default setting value) 

/10/20/30/40/50/60/70/80/90/100/

110/120/130/140/150 (s) (*5)

Note:

(*1) See 7 Fault Detection for details.

(*2) When operating G9SX using Logical AND Connection function, be sure 

to set the preset switch to AND (valid) position for the units which the 

logical input signal is input to. When the switch is set to OFF (invalid) 

position, it is detected as a fault.

(*3) Set both of the two Off-delay Time Preset Switches, one each on the 

front and back, to the same value.

(*4) Off-delay time duration of Expansion Unit (OFF-delay model) 

synchronize with the OFF-delay time duration set by Off-delay Time 

Preset Switch of Advanced Unit.

(*5) See following illustration for setting position of Off-delay Time Preset 

Switch. Make sure that the direction of cutting edge of preset switch is 

correctly pointed to the off-delay time value which must be set.

Change the value of the preset switches only when G9SX is disconnected 

from power supply.

The states of the preset switches come into effect when the power supply to 

G9SX turns on.

cutting edge

ex.1) 0 second off-delay setting

ex.2) 70 second off-delay setting

For Type G9SX-ADA222-T15-

0 (default setting value) 

/0.2/0.3/0.4/0.5/0.6/0.7/1/1.5/2/

3/4/5/7/10/15 (s) (*5)

Preset Switches

 

OFF-DELAY

40

30

20

10

150

140

130

120

110

100

90

80

70

50

60

0

OFF-DELAY

40

30

20

10

150

140

130

120

110

100

90

80

70

50

60

0

Type G9SX-ADA222-T

-

 (Advanced Unit)

Internal Connection

2

*1 Internal power supply circut is not isolated.

*2 Logical AND input1 and Logical AND input2 and the Internal circut are isolated.

*3 The Safety solid-state outputs,S14 - S54, are internally redundant, respectively.

*3

*1

*2

Power
supply

circuit

Safety

Input 1

Safety

Input 2

Safety outputs control

Auxiliary outputs

control

Reset/Feedback

Input

Expansion Unit

outputs control

Cross fault

detectiaon

mode in

Logical

AND input1

Logical

AND input2

S14

A2

S24 S44 S54

L2 X1 X2

L1

T11

A1

T12 T21 T22 T31 T32 T33 Y1

T41 T42 T51 T52

Indicator

Relation between each Logical AND connection 
preset switch and Safety output state

Settings indication 

(at power on)

Items

Logical AND connection

preset switch setting

Conditions for Safety output ON state

Setting

position

indicator

status

Setting mode

Setting

status

Y1 terminal

T32 or T33

 terminal

light up
not lit

detection mode

non-detection mode

Y1 =  open
Y1 = 24VDC

light up
not lit

manual reset mode

auto reset mode

T33 = 24VDC
T32 = 24VDC

light up
not lit

enable Logical AND input
disable Logical AND input

'AND1'
'OFF'

Logical AND 

connection 

preset switch1

T1

FB

T41/T42

T51/T52

Safety Input

Logical Input1 Logical Input2

OFF

OFF

ON

OFF

OFF

AND1

OFF

ON

ON

OFF

OFF

AND2

ON

OFF

ON

AND1

AND2

ON

ON

ON

AND1

Cross fault 

detection 

mode

Logical AND 

connection 

input mode

light up
not lit

enable Logical AND input
disable Logical AND input

'AND2'
'OFF'

Logical AND 

connection 

preset switch2

AND2

Logical AND 

connection 

input mode

Reset 

mode

Settings for G9SX can be checked by indicators for approx 3 seconds 

after power on.

During the settings indication term, ERR indicator will light up,

however the auxiliary error output will remain off.

Relation between each logical AND connection switch setting and conditions

for Safety output in the ON state is as follows.

Flexible Safety Unit

0631702-7 F

Thank you for purchasing G9SX Flexible Safety Unit.

Please read and understand this manual before 

using the products.

Keep this manual ready to use whenever needed.

Only qualified person trained in professional 

electrical technique should handle G9SX.
Please consult your OMRON representative if you 

have any questions or comments.

Make sure that information written in this document 

are delivered to the final user of the product.

Type G9SX-ADA222-T

-

USER'S MANUAL

Safety Precautions

Meanings of Signal Words

The following signal words are used in this manual.

Alert Statements

Indicates prohibited actions

Meaning of Alert Symbols

The following alert symbols are used in this manual.

Indicates mandatory actions

WARNING

WARNING

Controlling 

Devices

Emergency 

stop switch

Door 

interlocking

switch 

Limit switch

Safety Sensor

Relay with 

forcibly guided 

contacts

Contactor

Other devices

Requirements

Use approved devices with Direct Opening 

Mechanism complying with IEC/EN 60947-5-1

Use approved devices with Direct Opening

Mechanism complying with IEC/EN 60947-5-1 

and capable of switching micro loads of 24VDC, 

5mA.

Use approved devices complying with the 

relevant product standards, regulations and 

rules in the country where it is used.

Use approved devices with forcibly guided 

contacts complying with IEC 61810-3 (EN 50205).

For feedback purpose use devices with contacts 

capable of switching micro loads of  24VDC, 5mA.

Use approved devices complying with IEC/

EN 60947-4-1 auxiliary contact linked with power 

contact (mirror contact).

For feedback purpose use devices with contacts 

capable of switching micro loads of 24 VDC, 5 mA.
Evaluate whether devices used are appropriate 

to satisfy the requirements of safety category level.

Indicates a potentially hazardous situation 
which, if not avoided, will resultin minor or 
moderate injury, or may result in serious 
injury or death. 
Additionally there may be significant 
property damage.

(1) Use G9SX within an enclosure with IP54 protection or higher of IEC/EN60529

(2) Incorrect wiring may lead to loss of safety function. Wire conductors 

correctly and verify the operation of G9SX  before commissioning the 

system in which G9SX is incorporated. 

(3) Do not apply DC voltages exceeding the rated voltages, nor any AC 

voltages to G9SX. Do not connect to DC distribution network.

(4) Use DC supply satisfying requirements below to prevent electric shock.

- DC power supply with double or reinforced insulation, for example, 

according to IED/EN60950 or EN50178 or a tranceformer according 
to IEC/EN61558.

- DC supply satisfies the requirement for class 2 circuits or limited 

voltage/current circuit stated in UL 508.

(5) Apply properly specified voltages to G9SX inputs.

Applying inappropriate voltages cause G9SX to fail to perform its specified 

function, which leads to the loss of safety functions or damages to G9SX

(6) Auxiliary error outputs and auxiliary monitoring outputs are NOT safety outputs.

Do not use auxiliary outputs as any safety output.

Such incorrect use causes loss of safety function of G9SX and its 

relevant system.

Also Logical connection outputs can only be used for logical connections 

between G9SXs.

(7) After installation of G9SX, qualified personnel should confirm the 

installation, and should conduct test operations and maintenance.

The qualified personnel should be qualified and authorized to secure the 

safety on each phases of design, installation, running, maintenance and 

disposal of system.

(8) A person in charge, who is familiar to the machine in which G9SX is to be 

installed, should conduct and verify the installation.

(9) Turn OFF the signal to Safety input or Logical AND connection input 

every 24hours and make sure G9SX operates without faults by checking 

the state of the ERR indicator.

(10) Do not dismantle, repair, or modify G9SX.  It may lead to loss of its 

safety functions.

(11) Use only appropriate components or devices complying with relevant 

safety standards corresponding to the required level of safety categories. 

Conformity to requirements of safety category is determined as an entire system. 

It is recommended to consult a certification body regarding assessment 

of conformity to the required safety level.

(12) OMRON shall not be responsible for conformity with any safety 

standards regarding to customer's entire system.

(13) Disconnect G9SX from power supply when wiring. Devices connected to 

G9SX may operate unexpectedly.

(14) Be cautious not to have your fingers caught when attaching terminal 

sockets to the plugs on G9SX.

Precautions for Safe Use

25mm min

25mm min

ED

PWR

A2

X2

44

34

24

14

A1

33

43

13

23

No.

G9SX-
24VDC

ED

PWR

A2

X2

44

34

24

14

A1

33

43

13

23

No.

G9SX-
24VDC

G9SX-BC202
24VDC

No.

T1

T2

FB

ERR

EI

PWB

L2

L1

S24

S14

A2

X2

T22

T21

A1

X1

T12

T11

Y1

T32 T33

T31

50mm min

50mm min

ERR

ERR

EX041-T

EX041-T

No.

OFF-DELAY

40

30

20

10

150

140

130

120

110

100

90

80

70

50

60

0

L1

S54

S44

S24

S14

L2

A2

T42

T41

T22

T21

A1

X2

T52

X1

T51

Y1

T12

T11

T33

T31

T1

ERR

EI

AND1

FB

ED

T2

AND2

PWR

T32

G9SX-ADA222-T150
24VDC

Appearance and Explanation of 
Each Parts

1

Type G9SX-ADA222-T

-

 (Advanced Unit)

No.

OFF-DELAY

40

30

20

10

150

140

130

120

110

100

90

80

70

50

60

0

L1

S54

S44

S24

S14

L2

A2

T42

T41

T22

T21

A1

X2

T52

X1

T51

Y1

T12

T11

T33

T31

T1

ERR

EI

AND1

FB

ED

T2

AND2

PWR

T32

G9SX-ADA222-T150
24VDC

Logical AND 
connection output

Power Supply(-)

Power )

Logical AND
connection1 input

Logical AND
connection2 input

Termination
Connector

Off-delay
time preset
switch

Feedback/
Reset input

Auxiliary
Monitor output

Auxiliary
Error output

Cross fault detection
mode input

Safety
Input2

Safety solid-
state outputs

Safety
Input1

Off-delayed Safety solid-state outputs

Logical AND
connection1
preset switch
(T41/T42)

Logical AND
connection2
preset switch
(T51/T52)

40

30

20

10

150

140

130

120

110

50

0

100

60

OFF-DELAY

AND2

OFF

T51/T52

AND1

OFF

T41/T42

Marking

LED Indicators

Color

Name

Function

Power Supply
Indicator

Error Indicator

Safety input #1 
Indicator

- Blinks when error relating to Safety  

input #1 occurrs. (*1)

- Lights up while high signal is input to T12

- Lights up or blinks corresponding to the 

occurring error (*1)

- Lights up while power is supplied.

Safety input #2 
Indicator

- Blinks when error relating to Safety  

input #2 occurrs. (*1)

- Lights up while high signal is input to T22

Logical AND 
input1 Indicator

-- With automatic reset while high signal is 

input to T33

- Lights up in the following cases:

- Lights up while high signal is input to T41.
- Blinks when error relating to Logical 

AND connection Input occurrs. (*1)

-- With manual reset while hgh signal is 

input to T32.

- Blinks when an error relating to 

Feedback/Reset  input occurrs. (*1)

Safety output
indicator

- Blinks when an error relating to Safety 

solid-state output occurrs. (*1)

- Lights up while Safety solid-state outputs 

(S14, S24) are in ON-state.

Off-delayed
Safety output
Indicator

- Blinks when an error relating to Safety off- 

delayed solid-state output occurrs.(*1)

- Lights up while Safety off-delayed solid- 

state outputs (S44, S54) are in ON-state.

Feedback/Reset 
input Indicator

PWR

ERR

T1

T2

AND1

EI

ED

FB

Green

Red

Orange

Orange

Orange

Logical AND 
input2 Indicator

- Lights up while high signal is input to T51.
- Blinks when error relating to Logical 

AND connection Input occurrs. (*1)

AND2

Orange

Orange

Orange

Orange

Type G9SX-ADA222-T

-

 

(Advanced Unit)

Dimensions

3

*Note2

*Note2

(6)

(6)

100 max.

115 max.

35.5 max.

*Note1 Above outline drawing is for -RC terminal type.

*Note2 For -RC terminal type only.

Typical dimension

(35)*

(10)

No.

OFF-DELAY

40

30

20

10

150

140

130

120

110

100

90

80

70

50

60

0

L1

S54

S44

S24

S14

L2

A2

T42

T41

T22

T21

A1

X2

X1

T52

T51

Y1

T12

T11

T33

T31

T1

ERR

EI

AND1

FB

ED

T2

AND2

PWR

T32

G9SX-ADA222-T150
24VDC

Ratings and Specifications

4

Ratings

Specifications and Performance

Isolation specifications

Rated supply voltage

Power

Item

input

Outputs

24VDC

TYPE G9SX-ADA222-T

-

-15% to +10% of rated supply voltage
4 W Max. 

(See Note1)

P channel MOS FET output
Load current:
Using 2 outputs or less: 1A DC Max.
Using 3 outputs or more: 0.8A DC Max.

(See Note4)

PNP transistor output
Load current: 100mA Max.

Operating voltage range
Rated power consumption
Safety solid-state output 

(See Note3)

Off-delayed safety solid-state output 

(See Note3)

Auxiliary output

Item

TYPE G9SX-ADA222-T

-

II
50ms Max. (Safety input)

100ms Max. (Logical AND connection input)

(See Note5,6)
15 ms Max. 

(See Note5)

11 V min.
5 V min.
1 mA max.

100 ms min.

100 ms min.

0.1 mA max. (safety output, auxiliary output)

3.0 V max. (safety output, auxiliary output)

100 m max.

(External connection impedance: 100ohm max. and 10 nF max.)

10 mA min.

Within plus or minus 5% of the set value

Frequency: 10 to 55 to 10Hz,

Amplitude: 0.375mm half amplitude (0.75mm double amplitude)

-10 to +55     (No freezing or condensation)
25 to 85 %RH
0.5Nm
Approx. 200 g

Over voltage category (IEC/EN 60664-1)
Operating time (OFF to ON state)

Response time (ON to OFF state)

ON-state residual voltage

Input current
ON voltage
OFF voltage
OFF current
Maximum wiring length

Reset input time

OFF-state leakage current

(Permissible impedance : 100ohm Max. and 10nF Max.)

100m Max.

Maximum cable length for logical connection inputs 

and Safety inputs

4 units Max. 

(See Note7)

Number of units connected per one Logical connection output.

20 units Max. 

(See Note7,8)

Total number of units connected with Logical connection

5 units Max. 

(See Note7)

Number of units connected in series with Logical connection
Accuracy of Off-delay time

100ms Min.

Reset input time
Vibration resistance

Mechanical shock resistance
Ambient temperature
Ambient humidity
Terminal tightening torque
Weight

Item

TYPE G9SX-ADA222-T

-

20Mohm Min.

(by 100VDC megger)

20Mohm Min.

(by 100VDC megger)

500VAC for 1min

500VAC for 1min

Insulation resistance

Dielectric strength

- Between all terminals connected together 

and DIN rail.

- Between Logical AND connection1 terminals, 

and

Power supply input terminals and other input and output terminals connected together. 

500VAC for 1min

- Between Logical AND connection2 terminals, 

and

Power supply input terminals and other input and output terminals connected together. 

- Between all terminals connected together 

and DIN rail.

- Between Logical AND input1 terminals, 

and

Power supply input terminals and other input and output terminals connected together. 

20Mohm Min.

(by 100VDC megger)

- Between Logical AND input2 terminals, 

and

Power supply input terminals and other input and output terminals connected together. 

300 m/s2 (destruction), 100 m/s2 (malfunction)

(Applicable only to TYPE G9SX-

-RT: screw terminal model)

Number of units connected 

in series with Logical 

connection : 5 units Max.

typ.100ms

OFF

ON

360

   s Max.

Note:

(1) Power consumption of loads not included .

(2) Ensure that the current exceeds the minimum applicable load of the 

device connected.

(3) While safety outputs are at its ON state, signal sequence shown 

below is output continuously for diagnosis.

When using the safety outputs as input signals to control devices 

(e.i. programmable controller), consider the off pulse below.

(4) The following derating is required when Units are mounted side-by-side.

- 0.4 A max. load current

(5) When multiple units are connected by logical connection, the total 

operating/response time is an accumulation of the 

operating/response time connected.

(6) Required time for safety solid-state output to turn ON, after 

necessary inputs turn ON.

(7) For details of the system with logical connection refer to the 

illustration below.

(8) The number of TYPE G9SX-EX401-

 (Expansion Unit) and TYPE 

G9SX-EX041-T-

 (Expansion Unit, Off-delayed model) not included.

Advanced Unit

or Basic Unit

Advanced Unit

Advanced Unit

Advanced Unit

Advanced Unit Advanced Unit

Advanced Unit Advanced Unit

Advanced Unit Advanced Unit

Advanced Unit

Advanced Unit

Advanced Unit Advanced Unit

Advanced Unit Advanced Unit

Advanced Unit Advanced Unit Advanced Unit

Advanced Unit

Total number of units connected with 

Logical connection : 20 units Max.

Number of units connected 

per one Logical connection 

output : 4 units Max.

Note2. For G9SX-AD322-T

-

, one Logical output is available.

Note1. Basic Unit = G9SX-BC

  Advanced Unit = G9SX-AD or G9SX-ADA

English

EU Declaration of Conformity

Standards

OMRON declares that G9SX is in conformity with the 
requirements of the following EU Directives:
 

EMC Directive 2014/30/EU

 

Machinery Directive 2006/42/EC

G9SX is designed and manufactured in accordance with 
the following standards:
 

EN ISO13849-1:2015 Category 4 PL e,

 

IEC/EN61508 SIL3,

  IEC/EN61000-6-2, IEC/EN61000-6-4,  
 UL508, 

  UL1998,

 

CAN/CSA C22.2 No.142

Precautions for Correct Use

Original instructions

Suitability for Use 

Omron Companies shall not be responsible for conformity with any standards,

codes or regulations which apply to the combination of the Product in the

Buyer’s application or use of the Product. At Buyer’s request, Omron will

provide applicable third party certification documents identifying ratings and

limitations of use which apply to the Product. This information by itself is not

sufficient for a complete determination of the suitability of the Product in

combination with the end product, machine, system, or other application or

use. Buyer shall be solely responsible for determining appropriateness of the

particular Product with respect to Buyer’s application, product or system.

Buyer shall take application responsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS

RISK TO LIFE OR PROPERTY OR IN LARGE QUANTITIES WITHOUT 

ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO 

ADDRESS THE RISKS, AND THAT THE OMRON PRODUCT(S) IS PROPERLY 

RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL 

EQUIPMENT OR SYSTEM.

OMRON Corporation 

 (Manufacturer)

 Contact:  www.ia.omron.com

Regional Headquarters

Shiokoji Horikawa, Shimogyo-ku, Kyoto, 600-8530 JAPAN

OMRON EUROPE B.V. (Importer in EU)

Wegalaan 67-69, 2132 JD Hoofddorp

The Netherlands

Tel: (31)2356-81-300/Fax: (31)2356-81-388

OMRON ELECTRONICS LLC

2895 Greenspoint Parkway, Suite 200 

Hoffman Estates, IL 60169 U.S.A.

Tel: (1) 847-843-7900/Fax: (1) 847-843-7787

OMRON ASIA PACIFIC PTE. LTD.

No. 438A Alexandra Road # 05-05/08 (Lobby 2), 

Alexandra Technopark, 

Singapore 119967

Tel: (65) 6835-3011/Fax: (65) 6835-2711

OMRON (CHINA) CO., LTD.

Room 2211, Bank of China Tower, 

200 Yin Cheng Zhong Road, 

PuDong New Area, Shanghai, 200120, China

Tel: (86) 21-5037-2222/Fax: (86) 21-5037-2200

Output

Input

Serious injury may possibly occur due to breakdown of 

safety outputs.

Do not connect loads beyond the rated value to the safety 

outputs.

Serious injury may possibly occur due to loss of required 

safety functions.

Wire G9SX properly so that supply voltages or voltages 

for loads do NOT touch the safety inputs accidentally or 
unintentionally.

Serious injury may possibly occur due to damages of 

safety inputs.

Apply protection circuitry against back electromotive force 

in case connecting inductive loads to safety outputs.

Serious injury may possibly occur due to loss of safety 

functions.

Use appropriate devices referring to the information 

shown below.

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