KEYENCE GL-RHG Series User Manual
Page 132
2
Checklist
A-8
GL-RHG-M-NOA-E
App
end
ix
In case of using NPN output type cable, the OSSD is not short-circuited to 0 V, and the load is between
the OSSD and +24 V.
When two or more GL-RHG are connected in series, they are connected using the dedicated series
connection cable, which is not cut or extended.
AUX output and error output are not used as a safety output to the safety-related control system.
The cable sheaths are not damaged. The protection against the disconnection or short-circuit of cable,
which might be caused by crushing or being caught in a machine, is taken into account.
If two or more sets of the GL-RHG units are used in the vicinity of each other, the protection measures
against light interference is done through a series connection method or light interference prevention
method.
"Non-safety-related functions (output and input)" described in this manual are not incorporated in the
safety-related machine control system.
(3) Pre-check test while the machine is stopped.
You should do the following pre-check test with the test piece in order to make sure the operation of the
GL-RHG while the machine is stopped.
The OSSD indicator on the GL-RHG lights in red and the OSSD turns OFF while the test piece is present
in the protective zone. The following figure shows the movement procedure of the test piece.
The OSSD indicator and all bar LEDS light in green if no test piece is present in the protective zone.
When the EDM function is applied, the GL-RHG goes to an error condition and the OSSD indicator on
the GL-RHG lights in red if the EDM input opens while the test piece is present in the protective zone.
(4) Pre-check test while the machine is operating.
The purpose of this pre-check test is to make sure that the machine (hazards) stops its operation. This
test must be done after you completely make sure that there is nobody in the hazardous zone.
The machine stops if the test piece is present in the protective zone. It is recommended to try three
locations of test piece: near the transmitter, near the receiver, and in the central area of the protective
zone.
The machine (hazard) still stops its operation as long as the test piece is present in the specified detec-
tion zone. This test should be done for the whole protective zone.
The machine (hazard) stops its operation when the power for the GL-RHG is disconnected.
Minimum safety distance is ensured, which has been calculated according to the laws, regulations, and
standards of the country and region in which the GL-RHG is installed.
Start
Stop