Maximum safety standard
Type4 SIL3 PLe
Armoured Protection!
Safety Light Curtain
Strong × Simple × Smart
Safety Light Curtain
GL-R Series
Dedicated safety relay for
the GL-R Series
GL-R Series
Armoured Protection
What makes a light curtain "robust"?
KEYENCE conducted in-depth research to determine how light curtains are
damaged and learned that the most common cause is damage to the lens
surface when it is scratched, cracked, or otherwise broken due to impact from
parts or tools. In some cases, light curtains have been installed with user-
fabricated protective covers or housing to prevent this damage.
As a result of this research, KEYENCE has designed a light curtain with a
structure that prevents damage from parts or tools by narrowing the exposed
lens area and recessing it in an impact resistant housing.*
* the narrowest lens surface aperture in the industry, according to KEYENCE research as of March, 2012
Strong
Built-in guarding and the narrowest exposed lens surface in the industry.
With its narrow (9 mm wide) and recessed lens surface, the GL-R Series is protected
against impact and resultant damage from parts, tools or operators without the need for
any additional guards or covers. Additionally, the GL-R Series is protected from water and
washdown environments due to its IP65/67 enclosure ratings.
Operating distance
0.2 to 10 m
Detection capability
ø14 mm
GL-RF Series GL-RH Series GL-RL Series
2
Operating distance
0.2 to 15 m
Detection capability
ø25 mm
Operating distance
0.2 to 15 m
Detection capability
ø45 mm
Strong × Simple × Smart
Smart
No Dead Zone
Because the rst beam is emitted
10 mm* from each end, the light curtain
can be mounted ush inside of equipment,
eliminating the need for additional
guarding or outside mounting.
*Except GL-RL Series
7-segment display
If an error is ever detected by the light
curtain, the 7-segment display provides
a code that indicates the cause, which
greatly reduces the time required to take
corrective action.
One-line system
Reduce connections to as few as 5 wires
by using this system that eliminates
transmitter wiring completely.
Simple
Reduce installation time with simple wiring and easy-to-use
mounting brackets.
The introduction of the one-line system and optical synchronisation simplies
connections to as few as 5 wires.
Mounting brackets come pre-assembled to provide simple, one-step installation.
3
Strong
Securely protects the detection area
Built-in guarding will completely prevent impact to the lens surface by parts or tools of ø17 mm or more.*
Conventional Light Curtain
Narrow
Recessed
*See sp ecications for guarante ed values.
4
Lens surface Lens surface
GL-R Series
Strong × Simple × Smart
Thick and robust housing that resists impact
The GL-R Series is designed with a 3 mm thick housing that protects the light curtain body from various forms of impact, such as
dropping equipment or hitting it with tools.*
Hitting
*See sp ecications for guarante ed values.
Dropping Stepping, Kicking
No need for additional guarding
The GL-R Series can be installed and remain protected WITHOUT
the use of additional U-channel type guarding, which simplies
installation and reduces cost.
IP65/IP67 enclosure rating
The GL-R Series housing meets IP65/IP67 enclosure ratings based
on IEC standard, enabling its use in washdown environments
without fear of damage to the light curtain.
IP65
IP67
Water-jet (washdown) resistant
Watertight
Conventional Light Curtain
GL-R Series
Robust, yet slim
(compared to conventional KEYENCE models)
The overall size of the GL-R Series has been reduced to save space
on equipment whilst maintaining KEYENCE's high level of durability.
33% reduction in size compared to the
Conventional Light Curtain
46.5 mm
40 mm
GL-R Series
38 mm
32 mm
conventional model
Long range
The range of the GL-RH and GL-RL Series models have been increased over past models for use in applications requiring protection up
to 15 m.
5
Simple
One-line system
•Reduce the number of wires from 18 to 5
•1/3 of the wiring installation time compared to
conventional light curtains
[Recommended for smaller, single operation pieces of equipment]
Simplied wiring
Conventional Light Curtain
The transmitter and receiver had to be routed through the
machine and wired to the control panel.
6
18
wires
One-line system
5
wires
The transmitter receives power from the receiver, meaning that
only the receiver has to be wired to the control panel.
Strong × Simple × Smart
Shield
Advantages of the one-line system
Wiring is simplied by connecting the transmitter directly to the receiver, requiring that only the receiver be wired.
1
Reduced risk of mis-wiring due to the reduction in required connections.
2
Conventional Light Curtain
Wiring routed
through the
machine
Example of
wiring
(0V) B lue
(AUX o utput) Red
(Interl ock-reset-read y output) Green
Transmitt er
(Communi cation cable 1)
(+24 V) Brow n
(Wait in put) Purple
(Interl ock mode selecti on input) Pink
Orange
Orange/ black
(Commun ication cable 2)
One-line system
One-line
system
Control panel Control panel
Receiver
Example of
wiring
18
wires
Shield
(+24 V) Brow n
(OSSD 2) White
K2 K1
(0V) B lue
(OSSD1) B lack
(EDM inp ut) Red
(Reset i nput) Yellow
Reduction in
installation time up to
72%
Transmitt er
Receiver
5
wires
(0V) B lue
(+24 V) Brow n
(OSSD1) B lack
R2 R1
(FE) G rey
(OSSD 2) White
Optical synchronisation
[Recommended for larger pieces of equipment or work cells]
•Reduced wiring
Separate transmitter and receiver wiring simplies installation
Conventional Light Curtain
Synchronisation wiring is required. The transmitter and receiver can be wired separately, which
greatly simplies wiring and installation time. Long lengths of
cable are no longer required to be routed through the machine.
Optical synchronisation
7
Simple
Quick t brackets
Adjustable angle mounting bracket
Straight / L-shaped mounting bracket
No dead zone mounting bracket
Vertical Horizontal
[ Easy installation ]
1. No assembly required
Traditionally, mounting brackets have required assembly
before installation. However, the GL-R Series brackets
come pre-assembled, so installation is as simple as
sliding them into the mounting track and securing them
to the machine.
2. Insert the bracket into the mounting track
The GL-R Series is designed to simplify mounting by
inserting the brackets into the mounting track and
locking them in place.
3. Mount directly to standard extruded aluminium framework
The GL-R Series mounting brackets have been designed
to attach directly to standard extruded aluminium
framework without the need for any additional hardware.
Conventional brackets
GL-R Series
8
Strong × Simple × Smart
GL-T11R Type4 Quick Disconnect Safety Relay
The GL-T11R combines all of the features necessary to build a Category 4 compatible safety circuit in a single unit.
This makes it possible to dramatically reduce the amount of time and labour required by complex circuit design processes.
It also boasts quick disconnects that simplify the wiring process involved in connecting the light curtain to the relay.
The GL-T11R reduces the need for specialised knowledge about safety circuits.
Quick Disconnect
The safety light curtain is connected
via a quick disconnect, eliminating the
danger of wiring mistakes and reducing
the amount of time and labour required
for wiring.
GL-T11R
Spring type terminal
block
Easy and reliable wiring with no screw
terminals to tighten.
SL-U2 AC Power Supply
Space- saving desi gn
Space-saving
The GL-T11R design ensures that the
connectors do not extend beyond the
unit's footprint, helping to save space
inside the control panel.
Replaceable Relay
The relay board (OP-87682) can be
replaced without removing any wiring,
which eliminates time loss and potential
connection mistakes during rewiring.
* The terminal unit can also be removed
separately.
SL-U2
The SL-U2 dedicated power supply directly connects
to the side of the GL-T11R, providing power to
the entire light curtain setup without the need for
additional wiring.
9
Smart
Conventional Light Curtain
No Dead Zone
Because the rst beam is emitted
10 mm* from each end, the light
curtain can be mounted ush
inside of equipment, eliminating
the need for additional guarding or
outside mounting.
*Except GL-RL Ser ies
GL-R
10 mm*
Dead Zone
Dead Zone
7-segment & centre indicators
7-segment display
Errors are displayed as numeric codes, which reduces the amount of
time spent identifying and correcting the problem that was detected by
the GL-R Series.
Centre indicator
These indicators highlight the operational status of the GL-R Series to
the user. The indicators change colour to identify if the light curtain is
clear, interrupted, or in a lockout condition.
Side-Exit Cable
No Dead Zone
10
Built-in functionality
Strong × Simple × Smart
Mutual interference prevention
1
Mutual interference between 2 units can be prevented.
Reduced resolution function*
2
This function expands the size of the detection capability.
Up to 2 axes can be disabled.
* In the single zone mode.
For deta ils, refer to GL-R Use r’s Manual.
Centre indicator function control
3
The centre indicators can be turned off to reduce current
consumption.
Built-in series connection ability
The coverage of the GL-R Series can be easily expanded by connecting
additional units in series. All models include this feature as standard.
QD connector
The GL-R Series can easily be connected to a general-purpose, M12 quick
disconnect port or cable.
Corner mirror
Corner mirrors are available to allow 1 set of curtains to cover up to 4 sides
of a machine and reduce the amount of wiring required.
20 mm*
*Except GL-RL Ser ies.
11
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