Datalogic SG4 FIELDBUS Series, Instruction Manual, Page: 59 / 136

MUTING
INSTRUCTION MANUAL 49
• If MUTING1 and MUTING2 inputs are activated by two Muting sensors or actua-
tors, these should be correctly connected and positioned in order to avoid unde-
sired Muting or potentially dangerous conditions for the operator.
• MUTING1 and MUTING2 can't be activated simultaneously.
• State of Muting is signaled 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 make sure to place the lamp in a position as visible as pos-
sible.
• If the external lamp is broken and/or not connected, the Muting request causes a
SAFE lockout condition and the corresponding failure is signaled.
• If both first and last beams are intercepted by the passing material the light cur-
tain 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.
Muting function disable (SG4-P Models)
During light curtain operations Muting function can be dynamically disabled or enabled:
when disabled no valid Muting request will be accepted at the MUTINGX inputs and
safety function will always be on.
The user can disable the Muting function at runtime by setting a high level on the signal
MUTING DISABLE (pin 7 of the M12-12 poles connector).
Muting signaling devices
In order to make use of Muting function, it is compulsory to connect a dedicated signal-
ing device (lamp); without it the light curtain goes in failure lock-out state.
Both incandescent and LED lamps are allowed. In case of use of LED lamp, take care to
connect it respecting the right polarity.
A Lamp TEST is executed cyclically when the lamp is lighted on in order to guarantee the
detection of lack of functionality.
If a lamp break is detected, ESPE goes in Lamp Failure Lock-Out state and shows the
related message on the display (refer to "
Technical Data" on page 83
for information
about the lamp).
CAUTION
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 V2 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.