Safety Light Curtains with Blanking features BLVT

Properties

  • Blanking features for blanking any obstacles in the detection field
  • integrated switching unit, contactor control and restart interlock activated by Dip-switches
  • can be connected directly to contactors/valves, switching capacity 0,5A/24V
  • minimum safety distance due to short response times, between 5 ms and 25 ms, depending on constructional length
  • detection of smallest obstacles (14 mm / 30 mm) inside a detection range of 7 meters / 24 meters
  • between 7 and 247 beams with protective heights from 100 up until 2500 mm
  • micro-processor controlled safety functions
  • muting and stroke operation with optional safety control-unit PLSG
  • self-monitoring semiconductor outputs with line interruption monito ring, short-circuit- and side current passages check
  • built-in self-diagnosis with error display
  • protective system IP 65 (waterproof sealed)

The light curtain correspond to the following safety regulations:

EN 954-1 and IEC 61496 part + part 2 bzw. EN 61496:
Safety inegrity SIL 3 (IEC 61508) 
Performance Level PL e (ISO 13849-1) 
Safety category cat. 4 (EN 954-1)

Function description

The transmitter generates infra-red light beams flashing at high speed in synchronous action. The parallel light beams with a spacing of 7,5mm or 14,3mm are monitored by miocro-controllers. The receiver evaluated the arriving beams in synchronous action to the transmitter.
Due to the closeness of the beams, a resolution of 14 mm / 30 mm is achieved. If an obstacle is placed into the protective field, i.e. at least iner lieght beam is interrupted, the hazardous movement of the machine is stopped, i.e. a new start is not possible.

Integrated connector plug in connector cover

Operating mode

The operational mode with contactor control serves for monitoring of the triggered seconday contactors. After each interruption of the beams and before each release of the outputs, it is verified whether the secondary contactors have fallen. Only then another release is possible. If there is no reaction by contactors within 300 ms, the light curtain switches off the outputs and turns into interruption/locked mode.

DIP-position without contactor check
DIP-position with contactor check

If the operational mode with restart interlock is selected, a push-button must be installed at the start button input in order to release the start of the working movement.

With free protective field, the yellow receiver LED lights up, requesting operation start.
Only after pushing the start button both outputs of the ULVT are activated.

DIP-position without restart interlock
DIP-position with restart interlock

During the operational mode equivalent outputs both PNP-outputs are safety outputs and provide short-circuit- and side-current passages monitoring. With free optical path both outputs are high (+24V). During the operational mode antivalent outputs, output No .1 is high (+24V) and output No. 2 low (0V), with free optical path. During this operational mode, output 2 does not provide fail-safe results. This operational mode is only permitted if the safety control unitsLSUW NSR 3-1K, LSUW N1-Muting K or another safe secondary control to monitor output No. 2. are applied!

DIP-position equivalent outputs
DIP-position antivalen outputs

Technical data

 Transmitter ULVTSReceiver BLVTE
Supply voltage24V DC SELV, +20% -10%24V DC SELV, +/- 20%
Current consumptionmax. 250mAmax. 250mA (without load)
Outputs-OSSD 1 and 2:
error-proof PNP outputs; max. 0,5A short-circuit and transverse conclusion monitoring
(in operating mode of antivalent outputs Output2 is not error-proof, max. 20mA)
Inputs-Inputs contactor control and start push-button: 0V to 24V DC + / - 20%
electrical linkintegrated plug connector with PG9 as strain relief;
alternatively usual market plug connectors
integrated plug connector with PG9 as strain relief;
alternatively usual market plug connectors
Lead3-pol. max 1,5mm²5 to 7-pol. (depending upon type of driving) max. 1,5mm²

Additional functions

For additional functions, like potential-free output contacts, stroke operation or Muting, the optional safety switching units ULSG, LSUW NSR 3-1-K and LSUW N1-Muting K are available, as well as a special programmer device for the Blanking program.

Executions

  resolution 14 mmresolution 14 mmresolution 30 mmresolution 30 mm
Protection box height (mm)
/ ray number
Construction length (mm)Order datareaction time (ms)Order datareaction time (ms)
100 / 13196BLVT 100 / 137BLVT 100 / 77
200 / 26296BLVT 200 / 269BLVT 200 / 149
300 / 39369BLVT 300 / 3910BLVT 300 / 2110
400 / 52496BLVT 400 / 5212BLVT 400 / 2812
500 / 65596BLVT 500 / 6514BLVT 500 / 3514
600 / 78696BLVT 600 / 7815BLVT 600 / 4215
700 / 91796BLVT 700 / 9117BLVT 700 / 4917
800 / 104896BLVT 800 / 10419BLVT 800 / 5619
900 / 117996BLVT 900 / 11720BLVT 900 / 6320
1000 / 1301096BLVT 1000 / 13022BLVT 1000 / 7022
1100 / 1431196BLVT 1100 / 14324BLVT 1100 / 7724
1200 / 1561296BLVT 1200 / 15625BLVT 1200 / 8425
1300 / 1691396BLVT 1300 / 16927BLVT 1300 / 9127
1400 / 1821496BLVT 1400 / 18228BLVT 1400 / 9828
1500 / 1951596BLVT 1500 / 19530BLVT 1500 / 10530
1600 / 2081696BLVT 1600 / 20832BLVT 1600 / 11232
1700 / 2211796BLVT 1700 / 22133BLVT 1700 / 11933
1800 / 2341896BLVT 1800 / 23435BLVT 1800 / 12635
1900 / 2471996BLVT 1900 / 24737BLVT 1900 / 13337

Accessories

Downloads

ProductDocumentation
BLPG/BPSGOperating Instructions: Programming devices for BLVTPDFPDF------
MutingDescription of the Mutingfunktion of the guard light barriersPDF-------
BLVTSupplementing operating instructionPDF-------
BLVTAppliance descritionPDFPDFPDFPDF----
BLVTOperating instructionsPDFPDF------
BLVTDimensional drawings of XLVT 100-1900 in stp,igs,dxf,dwgZIP
SISTEMA BibliothekFiessler Sistema LibrarySISTEMA Bibliothek

Contact

Guard BLVT

++49(711) 91 96 97 - 27
technical information

++49(711) 91 96 97 - 10
Ordering and price information