KEYENCE GL-RHG Series - Manual (Page 59)

3-11 GL-RHG-M-NO3-E
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Light Interference Prevention Method
When more than one GL-RHG systems are installed, the OSSD may go to the OFF-state by the light inter-
ference between GL-RHG units.
There are three light interference prevention methods as follows.
Light Interference Prevention Function
 When wire synchronization or one-line system is applied
The light interference prevention function automatically reduces mutual interference between GL-RHG
units.
 When optical synchronization system is applied
The light interference prevention function is applied according to Channel configuration.
The mutual interference is reduced between GL-RHG units with Channel A and Channel B.
The mutual interference is not reduced between GL-RHG units with Channel 0 and Channel 0, GL-RHG
units with Channel 0 and Channel A, or GL-RHG units with Channel 0 and Channel B.
Channel is configured by using the setting switch on the lower part of front side of GL-RHG units.
Configure the same Channel to the setting switch on both the transmitter and receiver.
For more information about the setting switch, see
"Part Description" (page 1-8).
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.
"Wiring System" (page 2-2)
Series connection
Connecting the GL-RHG units in series can prevent mutual interference.
"Series connection" (page 2-3)
DANGER
The response time varies according to the configuration of Channel.
"Response time (OSSD)" (page 7-5)