Datalogic SG4-14-030-OO-P, Instruction Manual

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SG4 EXTENDED INSTRUCTION MANUAL
40
7
7.7 MUTING
Muting function allows automatic deactivation of the safety function on the whole or part of
protected height in order to carry out definite cyclical operations without blocking machine
work.
As the pertaining safety requirements demand, ESPE is equipped with two muting activation
inputs, MUTING1 and MUTING2.
The Muting sensors must be able to recognise the passing material (pallets, vehicles, …)
according to material’s length and speed. In case of different transport speeds in the Muting
area, it is necessary to consider their effect on the total Muting duration.

The Muting function excludes the light curtain during functioning, maintaining active the
OSSDs’ outputs, according to particular operating requirements (Fig. 39).
L-shaped version with integrated
Muting sensors for unidirectional
Muting T-shaped version with integrated Muting
sensors for bidirectional Muting Linear version with external Muting
sensors
Fig. 39 – Examples of muting application

The safety light curtain is equipped with two inputs (MUTING1 and MUTING2) for the
activation of this function, according to the current Standards.

This function is particularly suitable when an object, but not a person, has to pass through the
dangerous area, under certain conditions.

It is important to remember that the Muting function represents a forced condition of the
system and therefore has to be used with the necessary precautions.

If MUTING1 and MUTING2 inputs are activated by two Muting sensors or actuators, these
should be correctly connected and positioned in order to avoid undesired Muting or potentially
dangerous conditions for the operator.

MUTING1 and MUTING2 can’t be activated simultaneously

State of Muting is signalled by an external Muting Lamp (that can be connected to the light
curtains with the pin 10 of the M12-12 poles connector) and by some leds on the user
interface. When the Muting function is ON the LAMP and the leds begin to blink.

During the installation take care to place the lamp in a position as visible as possible.

If the external lamp is broken and/or not connected, the Muting request causes a SAFE
lockout condition and the corresponding failure is signalled.

If both first and last beams are intercepted by the passing material the light curtain recovery
time may be longer. A material moving faster than 1 m/s could lead light curtain to switch in
OFF-state at the end of muting sequence.
Select carefully the configuration, as a wrong configuration can cause
the incorrect functioning of the Muting function and a reduction of the
safety level. For correct use of Muting, please refer to the relevant
reference standards.
The Muting sensors must be positioned in such a way that the
activation of the Muting function is not possible with the accidental
passing of a person.
Particular attention must be paid to the use of the
one-way L-muting mode: the external muting sensors or the SG-L-
ARMS muting arms must be positioned so as to allow the passage of
the material coming out of the dangerous area protected by the light
curtain.