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Devices used for muting function, Detailed operation – KEYENCE GL-RHG Series User Manual

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Temporary Suspension of Safety Function

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GL-RHG-M-NO2-E

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Devices used for muting function

Muting device

The muting device output must be N.O. (normally open).

A PNP output muting device is required when using the PNP output type cable and an NPN output mut-
ing device is required when using the NPN output type cable. 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.

Detailed operation

Conditions for initiation of muting

Muted condition is initiated if all of the following conditions are met:

Muting input 2 turns ON within 0.04 to 3 seconds after muting input 1 turns ON

GL-RHG detects no interruption in the protective zone

OSSD is in the ON state and remains for 0.5 seconds or more.

Conditions for termination of muting

Muted condition is terminated if one of the following conditions is met.

Either of the muting inputs goes to the OFF state for at least 5 ms.

Light curtain goes to an error condition

Wait input goes to ON state

The power supply is interrupted or restored.

Maximum muting period of approx. 5 minutes has been passed.

Reference

When the GL-RHG is interrupted, the GL-RHG cannot go to the muted condition. In this case, you
can apply override function to suspend the safety functions temporarily.

"Override function" (page

2-20)