5
SLC 420
SLG 420
Operating instructions
Safety light curtain/safety light grid
EN
2.8 Safety classification
Standards:
EN ISO 13849-1, EN 62061
PL:
up to e
Control category:
up to 4
PFH value:
619 x 10
-9
/ h
SIL:
up to 3
Service life:
20 years
2.9 Functions
The system consists of a receiver and a transmitter For the described
functions, no further switching elements are required For the
diagnostics and function selection, a PC-software is offered as an
accessory
For the diagnostics or the setting of parameters with a PC, the BUS
converter NSR-0801 is required (not included in scope of delivery)
The system has the following features:
• Protective mode (automatic start after release of the protection field)
• Start interlock
• Restart Interlock (manual reset)
• Contactor control (EDM)
• Beam coding
• Blanking of fixed protection field areas
• Blanking of movable protection field areas
Factory setting
The system features many functions without needing any additional
devices The following table gives an overview of the possible functions
and the factory settings configuration
Function
Factory
setting
Configuration
Protective mode
not active
External wiring
Restart interlock
(manual reset)
not active
External wiring
Blanking
fixed/floating
not active
With BUS converter
NSR-0801 and PC-software
Contactor control
(EDM)
not active
With BUS converter
NSR-0801 and PC-software
Start interlock
not active
With BUS converter
NSR-0801 and PC-software
Beam coding A
not active
With BUS converter
NSR-0801 and PC-software
2.9.1 Protective mode
The protective mode switches the OSSD outputs to ON state
(protection field not interrupted), without external release of a switching
device The protected operation is activated with an electrical
connection between pin 1 and pin 6 of the receiver
This type of protection generates an automatic restart of the machine if
the protection field is not interrupted
This operating mode may only be chosen in conjunction
with the restart interlock (manual reset) of the machine
This operating mode must not be chosen, when persons
can step behind the protection field
With a new start of the system a 24 VDC H signal on the
input of pin 1 causes the operating mode to change to the
setting mode
2.9.2 Restart interlock (manual reset)
The restart interlock (manual reset) prevents an automatic enabling of
the outputs (OSSD's ON state) after switch-on of the operating voltage
or an interruption of the protection field The system switches the
outputs only to ON state, when an external command device (restart
button) generates an enabling signal at the restart input (receiver)
The operating mode restart interlock is activated with an electrical
connection between pin 5 and pin 6 on the receiver
The command devices (enabling button) must be installed
outside of the hazardous area The hazardous area must be
easily visible to the user
By default neither the restart interlock (manual reset) nor
the protective mode is active You must choose one of
both operating modes to enable the OSSD outputs If no
type of protection is selected, you will obtain the following
signalisation through the LED status indication in the
receiver:
LED OSSD OFF (red) + LED restart (yellow) flashing
2.9.3 Fixed blanking SLC 420
The SLC 420 can blank stationary parts in the protection field
Multiple protection field areas can be blanked If small changes
are made within the fixed blanking area, each time 1 beam can be
additionally blanked to increase the tolerance Refer to the chapter
"Floating blanking"
Fixed blanking area
E1
R1
The range of the fixed blanking can be arbitrarily chosen in the
protection field
The first beam line, which realises the optical synchronisation and is
located immediately behind the diagnostic window, cannot be blanked
The area of the fixed blanking must not be modified after the teach-
in process Any change of the area or removal of the part from the
protection field will be detected by the system As a result, the outputs
are disabled (locked) This locking can be neutralised by executing a
new teach-in process in accordance with the actual beam interruptions
The function is activated by means of the NSR-0801 BUS
converter and a PC or laptop If the function is activated, the
LED blanking in the diagnostic window of the receiver starts
flashing
• The remaining lateral areas must be protected against
intrusion by means of mechanical covers
• The lateral covers must be fixed with the object
• Partial covers are not authorised
• After the fixed blanking, the protection field must be tested
by means of the test rod
• The restart interlock function of the safety light curtain or
the machine must be activated