KEYENCE GL-RHG Series - Manual (Page 3)

3 E GL-RHG-IM
 Setting switch
Point • The configuration of the setting switch is applied when the power is supplied.
• When the GL-RHG is in series connection, the setting switch configuration of the main
unit is applied regardless of the setting switch configuration of the sub unit.
• When the center indicator and reduced resolution are configured by using the
configuration software, the setting switch must be configured by default. Otherwise an
error occurs.
• When the GL-RHG operates in wire synchronization system, the setting switch for
Channel must be configured by default. Otherwise an error occurs.
"Wiring system" (page 3)
Beam center-line : An optical path joining the optical center of the emitting element on the transmitter to
the optical center of the corresponding receiving element on the receiver. The
GL-RHG must be installed so that the beam center-line mark on the transmitter and
that on the receiver face one another and are located at the same height.
Protective height : The height from the top beam center-line to the bottom beam center-line (length).
Detection height : An object approaching the protective zone from the top of the protective height is
first detected at point A, which is the distance of the detection capability from the top
of the protective height. The equivalent position on the bottom is called point B. The
height from the top edge of the specified target detection capability that exists at
point A to the bottom edge of the specified target detection capability that exists at
point B is called The "detection height".
The following calculation formula can be defined:
Detection height = "Protective height" + ( 2 x "the specified target detection
capability" ) – "beam axis diameter".
* Refer to the following diagram for an explanation of beam center-line, protective height and detection
height.
Protective zone : The zone in which the specified target detection capability can be detected. The
protective zone of the GL-RHG indicates a square area formed with the protective
height and the operating distance. When an object of the specified target detection
capability is present in this area, the light of the GL-RHG is blocked, and then the
OSSD goes to OFF state.
Detection zone : The square area formed with the detection height and the operating distance, which
is broader than the protective zone. When an object of the specified target detection
capability is present in this area, the light of the GL-RHG is blocked, and then the
OSSD goes to OFF state.
* Refer to the following diagram for protective zone and detection zone.
Functions and Features
The functions and features of the GL-RHG are described in this section.
Point For more information about these functions, see "GL-RHG Series User's Manual".
 Wiring system
The following three types of wiring systems are available in the GL-RHG series.
 : Available without the configuration software
 : Available with the configuration software
 Series connection
Up to three GL-RHG units which have up to 240 total number of beam axes (up to 228 total number of
beam axes when channel A or B is set by selecting the optical synchronization system) can be serially
connected and used as a single light curtain.
 OSSD
The OSSD is a safety-related control output. It connects to an external device (load), such as an FSD or
MPCE. The GL-RHG generates self-diagnosis signals on its internal control circuit to perform
diagnostics on the output circuit (OSSD). These signals periodically force the OSSD into a temporary
OFF state when no interruption exists in the protective zone.
 External device monitoring (EDM function)
EDM (External Device Monitoring) is a function of the GL-RHG that monitors the state of the control
devices which are externally connected to the GL-RHG. The GL-RHG can detect a fault, such as welded
contacts on external devices, as long as the EDM function is activated.
This function is available only when connecting the 11-core cable to the receiver.
 Muting Function
The muting function is used to temporarily suspend the GL-RHG's safety functions while the GL-RHG
receives a signal from muting devices (such as sensors or switches). Before this function can be used,
the outputs from the muting devices must be connected to the muting input terminal on the GL-RHG.
 Muting device
When using the muting device, it must be met with the following conditions.
•
The muting device output must be N.O. (normally open).
• Output of the muting device must be the output with contacts, and must be PNP output type if PNP
output type cable is used, or NPN output type if NPN output type cable is used. Also, the muting
device must be capable of 2 to 3 mA current.
• Do not use one muting device with multiple outputs in place of two or more muting devices. (Only
one output per one muting device must be used.)
• If the muting device has a timer function that can adjust the output timing, do not use that function.
 Muting lamp
When using the muting lamp, it must meet the following conditions.
For an incandescent lamp : rated 24 V DC, 1 to 5.5 W
For an LED indicator : rated current consumption must be 10 to 230 mA.
DANGER
• The response time varies according to the configuration of Channel.
"Response time (OSSD)" (page 8)
• The detection capability varies according to the configuration of reduced resolution.
Transmitter Receiver
Switch
No.
Function Configuration
2
Channel
Channel 0
(Not applied)
(Default) Use Channel for
light interference
prevention when
optical
synchronization
system is applied.
For details, refer to
the "Light
interference
prevention function"
(page 4).
Channel A
1
Channel B
2
1
2
1
2
1
Switch
No.
Function Configuration
6
Center
indicator
ON (Green) when all beam axes
are clear (Default).
OFF when all beam axes are clear.
(Green OFF)
5
Not in use
Do not change from the default
position.
4
3
2
Channel
Channel 0
(Not applied)
(Default) Use Channel for
light interference
prevention when
optical
synchronization
system is applied.
For details, refer to
"Light
interference
prevention function"
(page 4).
Channel A
1
Channel B
6
6
5
4
3
2
1
2
1
2
1
Beam center-line mark Beam center-line
Specified target detection
capability (position A)
Detection
height
Specified target detection
capability (position B)
protective
height
a: Beam axis spacing
b: Beam axis diameter
c: Detection capability
a
b
c
Protective zone Detection zone
Specified target detection capability
Protective height Detection height
Operating distance
Wiring system Optical synchronization system One-line system Wire synchronization system
Wiring diagram
Transmitter Receiver Transmitter Receiver Transmitter Receiver
Advantage
• Wiring is not needed between
the transmitter and receiver.
• The Transmitter and the
receiver can operate on
different power supplies.
• Simplified wiring.
• The unit connection cable is
not needed for the transmitter.
• All functions of the GL-RHG
are available.
Limitation
• The input and output functions
on the transmitter are not
available.
• All indicators other than
"Power" are not available on
the transmitter.
• The input and output functions
on the transmitter are not
available.
• There is a maximum limit for
the total length of cables.
• Wiring is needed between the
transmitter and the receiver.
Applicable
cable
Transmitter 5-core cable Series connection cable
7-core cable
11-core cable
Receiver
5-core cable
11-core cable 5-core cable
11-core cable 7-core cable
11-core cable
Wiring system
Optical
synchronization
One-line Wire synchronization
Cable
combination Cable for the transmitter 5-core Series connection 7-core 11-core
Cable for the receiver 5-core 11-core 5-core 11-core 7-core 11-core 7-core 11-core
Available
function
OSSD output        
AUX (auxiliary) output    
Error output    
Muting function  
Muting lamp output  
Override function  
EDM function    
Wait input    
Reset input (for error)    
Channel configuration
(Light interference
prevention function)
       
Center indicator
configuration
       
Monitoring function        