7
AVAILABLE FUNCTIONS
MERLINO elettronica s.a.s. di Meroni N.
Via Como, 33/A - 20851 Lissone - MB
E-mail: [email protected]
Web-site: www.merlinoelettronica.it
START RESTART INTRLOCK
EXTERNAL DEVICE MONITOR
MUTING
RED-RL safety devices can be easily setted, without making any internal modifications, to switch
from the automatic restart to the manual restart operation with start-restart interlock by a remote
push-button (Pag.13 - Fig.15/16).
In automatic restart operation the Receiver control logic, without consents from the outside, auto-
matically drives the two output signal switching devices to the active ON state every time that the
laser beam emitted from the Transmitter catches up the four sensing elements of the Receiver af-
ter that the same one has been interrupted from an obstacle. Instead, in the event in which the de-
vice comes setted for manual restart operation, every time that the laser light beam comes inter-
rupted is necessary to supply, for example by a push-button or a safety-pedal, an external input si-
gnal on the respective dedicated YELLOW color conductor (see paragraph 12.1 “Electrical con-
nections - RX”) that it qualifies the control logic of the Receiver to bring back to the active ON sta-
te the output signal switching devices after a switching OFF of the same ones as a result of an in-
terruption of the laser light beam.
An External Device Monitor (EDM) control loop circuit allows, the safety RED-RL guard, to control
the state of the correct operation of the devices (eg. relé, contactors, etc) externally connected to
the two outputs as a load, thus extending the safety level up to the machine primary control
elements. To such scope the Receiver, of the laser guard, is provided of the YELLOW color input
conductor who make head to the inside EDM circuit.
Between this conductor and ground, “0V” of power supply, has to be in series connected the
normally open switches of the external output load devices thus from being able to test their own
efficiency as a consequence of every actuation (passage from ON to the OFF state) of the barrier
for the interruption of the laser beam. In the event in which such function it does not used, it is
necessary to connect the conductor YELLOW to the ground “0V” of power supply.
For the “RED4-RL” Laser guard model, the “Neutralization” or “Muting” function is also
previded, that is the possibility of being able to suspend in temporary way its own
protecting function. That it means that when the two dedicated inputs are simultaneously
activated (within a maximum time of 0,8 second) putting separately in short-circuit the
PINK and GRAY conductors to the “0V” of power supply (RED conductor and Shield), the
Laser Guard surveillance action comes temporarely neutralized, allowing that the Laser
beam can be darkened without that the output signal switching devices (OSSDs) switch
to the inactive OFF state. A red color blinking signaler, situated on the top head of the “RX”
section (Pag.8), shows the activation of the Muting function. In the event of the two
dedicated muting inputs are not simultaneously activated, or however with a time delay
more than 0,8 second, the RED4RL switches into the block state opening the output
signal switching devices (OSSDs) and signaling it as the “D” case of the diagnostic table of
Pag 8.
. Adopt a visual and/or acoustic
to indicate in
unequivocal way the inactivity state of the Barrier to activated Muting.
Make attention using this function as it could generate potentially dangerous
situations
additional external signaler
Pag. 7
DESIGN AND MANUFACTURE
OF ELECTRONIC EQUIPMENT
MERLINO elettronica s.a.s. di Meroni N.
Via Como, 33/A - 20851 Lissone - MB
E-mail: [email protected]
Web-site: www.merlinoelettronica.it
MISU-RED-RL-UK-1.0
