Keyence 1477A User Manual

Important

Point

Reference

Important

• When disposing the GS (Lock), always follow the applicable

DANGER

NOTICE

DANGER

96M15312

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DANGER

requirements of the laws, rules, regulations and standards
in the country or region where the GS (Lock) is used.

• Dispose of this product as industrial waste.

Safety Interlocking
Switch

GS (Lock)

Instruction Manual

Detailed information and use of the GS (Lock) is also described in the "GS
(Lock) User's manual". In order to acquire the "GS (Lock) User's manual",
download it from the KEYENCE website or call the nearest KEYENCE office.
<KEYENCE website> www.keyence.com/global.jsp

This manual explains items such as the handling, operation, and precautions
for the Safety Interlocking Switch GS (Lock). Read this manual carefully and
thoroughly understand its contents to use the GS (Lock) to the full extent of its
capabilities.
Also, keep this manual in a safe place for future reference.
Ensure that the end user of this product receives this manual.

This manual is the original instruction manual.

Symbols

It indicates a hazardous situation which, if not avoided, will
result in death or serious injury.

It indicates a situation which, if not avoided, could result in
product damage as well as property damage.

It indicates cautions and limitations that must be followed
during operation.

It indicates additional information on proper operation.

 Environment of use

• Do not use the GS (Lock) in an environment (temperature,
humidity, interfering light, etc.) that does not conform to the
specifications contained in this manual.

• Do not use a device that emits strong electromagnetic
waves near the GS (Lock).

• This product is not intended for use as an explosion-proof
product. Do not use this product in a hazardous location
and/or potentially explosive atmosphere.

• Do not use the GS (Lock) in the presence of substances,
such as heavy smoke, particulate matter, or corrosive
chemical agents, that may induce deterioration in product
quality.

• Be sure to absolutely confirm that there is nobody in the
hazardous zone, before the interlock is released (i.e. the
machine system restarts) by the interlock reset mechanism.

• Indoor use only.

 Target machines for installation

• It must be possible to perform an emergency stop on the
machine to which the power-to-lock type GS (Lock) is
installed at any and all operation points during the
operation cycle. Also, do not use the power-to-lock type GS
(Lock) on machines that have irregular stop times.

• Do not use the GS (Lock) to control (stop forward motion,
etc.) trains, cars and other transportation vehicles, aircraft,
equipment for use in space, medical devices, or nuclear
power generation systems.

 Circuit design and wiring

• Be sure to turn the power supply off before performing
electrical wiring.

• Perform electrical wiring according to the electrical
standards, regulations and laws in the country or area in
which the GS (Lock) will be used.

• Use cables with length less than or equal to the
specification in this manual. Usage of cables longer than
the specified length may cause the improper operation of
safety functions and may cause a dangerous situation.

It indicates tips for better understanding or useful information.

Safety Precautions

 General precautions

• KEYENCE does not guarantee the function or performance
of the GS (Lock) if it is used in a manner that differs from
the GS (Lock) specifications contained in this manual or if
the GS (Lock) is modified by the customer.

• The GS (Lock) can only be used in combination with
dedicated actuators. It cannot be used in combination with
other actuators or similar devices.

• Do not bypass the GS (Lock), remove it or change its
installation orientation after installation.

• Do not use a replacement actuator to bypass the GS (Lock).
Store replacement actuators strictly to prevent their easy
access.

• When using the GS (Lock) to protect machine operators
against a hazard or hazardous zone or when using the GS
(Lock) as a safety component for any purpose, always
follow the applicable requirements of the laws, rules,
regulations and standards in the country or region where
the GS (Lock) is used. For such regulations, you should
directly contact the regulatory agency responsible for
occupational safety and health in your country or region.
Depending on the type of machine on which the GS (Lock) is

•

installed, there may be special safety regulations related to
the use, installation, maintenance, and operation of the safety
component. In such a case, you must fulfill such safety
regulations. The responsible personnel must install the GS
(Lock) in strict compliance with such safety regulations.

• The responsible personnel must do the training to the
assigned personnel for the correct use, installation,
maintenance, and operation of the GS (Lock).

• The user of the machine must receive specialized training
related to the GS (Lock), and must then understand and
adhere to the safety restrictions, laws, and regulations in
the country or area in which the GS (Lock) is being used.

• If the GS (Lock) does not operate correctly, the user of the
machine must report this information to the party
responsible for the use of the GS (Lock) and immediately
stop the machine.

• The GS (Lock) is designed with the assumption that it would
be correctly installed in accordance with the installation
procedures described in this manual and correctly operated
according to the instructions in this manual. You must
perform an appropriate installation of the GS (Lock) after
performing a sufficient risk assessment for the target
machine.

• Be sure to absolutely confirm that there is nobody in the
hazardous zone, before you remove the GS (Lock) from the
machine for replacement or disposal.

• Machine builder must consider the time the machine with
inertia takes to stop.

Precautions on Regulations and Standards

 CE Marking

KEYENCE Corporation has confirmed that this product complies with the
essential requirements of the applicable EU Directive(s), based on the
following specifications. Be sure to consider the following specifications when
using this product in the Member States of European Union.

• Machinery Directive

• RE Directive

The GS (Lock) is a safety component defined in the EU Machinery Directive
Annex V and has been certified by TÜV SÜD Product Service GmbH. The GS
(Lock) complies with the following EN Standards.

• EN 61508

• EN 62061

• EN ISO13849-1

• EN ISO14119

• EN 60947-5-3

• EN300 330

The full text of the EU declaration of conformity is available at the following
internet address: http://www.keyence.com/cedoc

• Frequency band of operation 123kHz

• Maximum radio-frequency power 60 dBμV/m

These specifications do not give any guarantee that the end-product with this
product incorporated complies with the essential requirements of RE and
Machinery Directive. The manufacturer of the end-product is solely
responsible for the compliance on the end-product itself according to these
Directives.

 CSA Certificate and North American Regulations

The GS (Lock) complies with the following UL and CSA standards and
regulations, and has received CSA certification.
Applicable standards:

• CAN/CSA C22.2 No. 61010-1

• UL61010-1

Be sure to consider the following specifications when using this product as a
product certified by CSA.

• Overvoltage category II

• Pollution degree 3

• Install this product at the altitude of 2000 m or less.

• Indoor use only.

• When using this product, use the following power supply. CSA or UL

certified power supply that provides Class 2 output as defined in the CEC
(Canadian Electrical Code) and NEC (National Electrical Code).

Applicable standard:

• FCC Part15 Subpart B, Class A Digital Device

• FCC Part15 Subpart C

• ICES-003, Class A Digital Apparatus

• RSS-210

1

E GS (Lock) IM

This device complies with part 15 of FCC Rules and Innovation, Science and

Reference

Lock bolt

Highly visible indicator

Center indicators

Actuator

Main unit

Auxiliary
release
mechanism

Metal head

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From the front

From the side

Horizontal

Not inserted in
the insertion slot

Reverse

Economic Development Canada's licence-exempt RSSs. Operation is subject
to the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Le présent appareil est conforme à la partie 15 des règles de la FCC et aux
normes des CNR d’Innovation, Sciences et Développement économique
Canada applicables aux appareils radio exempts de licence. L’exploitation
est autorisée aux deux conditions suivantes : (1)l’appareil ne doit pas
produire de brouillage, et (2) l’appareil doit accepter tout brouillage subi,
même si le brouillage est susceptible d’en compromettre le fonctionnement.

FCC CAUTION
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.

Note: This equipment has been tested and found to comply with the limits for
a Class A digital device, pursuant to part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in
a residential area is likely to cause harmful interference in which case the user
will be required to correct the interference at his own expense.

Chapter 1 Before Operation

1-1 Overview and Configuration

The GS (Lock) is a Type4 Interlocking Device with guard lock based on
ISO14119.

Coding level: Low or high (switchable)

“4-7 Coding Level” (page 7)

By combining the GS (Lock) with a door or similar movable safety guard and
with a safety-related control system, it is possible to prevent the door or
similar part from opening during hazardous machine operations.

 Optional parts

z Replacement actuator

GS-A21

1-3 Package Contents

 Main unit

• Sensor (main unit)

• Actuator

• Instruction Manual

Chapter 2 Installation

2-1 Installation Conditions

Note the following items before installation.

 The effect of surrounding metal

The sensor’s operating distance may be affected by the
presence of metal in the surrounding area. After installation,
determine the minimum safety distance based on the actual
operating distance and check if it is provided appropriately.

 Sensor and actuator orientation

Correct installation orientations

The GS (Lock) can also be used for other purposes such as
protecting manufacturing processes.

1-2 Product List

 Main unit

For details on the main unit models, see “5-1 Model Number Description”
(page 7).

 M12 connector type cables

z Standard cables

Use this cable in combination with a main unit (connector type) or
extension cable.

Typ e Model

Standard

Advanced

GS-P8C5
GS-P8C10 10 m
GS-P12C5
GS-P12C10 10 m

function

GS-P12C20 20 m

z Extension cables

Typ e Model

GS-P8CC1

Standard

 Mounting brackets

z For main unit and actuator set

GS-B21

z For actuator

GS-B31, GS-B33, GS-B41, GS-B43

GS-P8CC5 5 m
GS-P8CC10 10 m

Number of pins

8

12

Number of pins

8

Length

5 m

5 m

Length

1 m

Incorrect installation orientations

• Install the GS (lock) so that the lock bolt inserts securely
into the sensor’s insertion slot when the door or similar
object to which the actuator is installed is closed.

• Do not use the GS (Lock) as a mechanical stopper.

E GS (Lock) IM

2

 Mutual interference

50 mm or more 50 mm or more

50 mm or more

M5 screws
Tightening torque: 3.0 N⋅m

Mounting bracket GS-B31

M6 screws
Tightening torque: 5.2 N⋅m
Strength class:

Carbon or alloy steel: Property class 8.8 or higher
Stainless steel: Property class **-70 or higher

M5 screws
Tightening torque: 3.0 N⋅m
Strength class:

Carbon or alloy steel: Property class 8.8 or higher
Stainless steel: Property class **-70 or higher

Plastic pipe

M5 screws
Tightening torque: 3.0 N⋅m

M6 screws
Tightening torque: 5.2 N⋅m
Strength class:

Carbon or alloy steel: Property class 8.8 or higher
Stainless steel: Property class **-70 or higher

When using multiple GS (Lock) units in close proximity, they may malfunction
due to mutual interference. To prevent mutual interference, install the GS
(Lock) units as shown below.

Distance between sensors

To support the installation of screw, a plastic pipe is pre-inserted to the

3

insertion slot in the metal head. Insert a screw into this pipe to smoothly set
the screw in appropriate position.

4

2-2 Installation Method

 Installing the unit on a hinged door

1

2

 Installing the unit on a sliding door

1

2

3

E GS (Lock) IM