SICK CLV 420 - User Manual

Questions and Answers

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Dennis FisherNov 1, 2025
What to do if the 'Result' LED on my SICK CLV 420 doesn't light up?
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  Levi DoyleNov 1, 2025
  If the 'Result' LED doesn't light up, the 'Result 2' switching output doesn't pulse, or the SICK Barcode Reader (CLV) outputs status ST = 2, it indicates an unsuccessful read. This could be due to several reasons: * No barcode was present in the reading field during the reading pulse. * The scan line may be positioned incorrectly. * The evaluation range of the scan line (CP values) might be improperly limited. * The barcode might be presented at an incorrect reading distance or be excessively tilted. * The reading angles could be too large or the barcode might be in the total reflection zone. To resolve this: * Synchronize reading with the object. * Ensure the barcode is centered on the scan line and check reading quality in the CLV Setup program using PERCENTAGE EVALUATIO...
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Charles GarnerNov 11, 2025
Why is my SICK CLV 420 Barcode Reader not reading the barcode?
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  Jessica LunaNov 11, 2025
  If your SICK Barcode Reader (CLV) isn't reading the application-specific barcode, and there's no confirmation from the beeper, it could be due to the following reasons: * The CLV is not in 'AutoSetup' mode. * If AutoSetup was started with profile barcode no. 10, the 5-second wait time after power-up might have been exceeded. * The barcode is presented at an incorrect reading distance. * The barcode is in the total reflection zone. * The barcode quality is not adequate. To troubleshoot: * Check if the 'Device Ready' LED is lit, indicating the CLV is in 'reading' mode. If it is, restart AUTOSETUP from the VIEW pull-down menu in the CLV Setup program. * Power cycle the CLV and present profile barcode no. 10 within 5 seconds, then present the application-specific barcode. * ...
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barrettjodiNov 22, 2025
What to do if the 'Device Ready' LED is off on my SICK CLV 420?
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  Sara PowellNov 22, 2025
  If the 'Device Ready' LED on your SICK Barcode Reader is not lit, it could mean: After switching on: * The Barcode Reader is not getting power. * The Barcode Reader found an error during its self-test. During operation: * The Barcode Reader is not in reading mode. * The Barcode Reader turned off the laser after 10 minutes (default) from the start of the reading pulse. To fix this: * Check the power wiring, especially the power connector to the connection module. Measure the voltage at pin 1 and pin 5. * Try turning the Barcode Reader off and on again. If the LED still doesn't light up, contact SICK Service. * Use the CLV Setup program to return to reading mode. * End the reading pulse, check its function, generate a new pulse, or change the laser timeout using the CLV...

SICK CLV 420 Specifications

General

Protection Class	IP65
Power Consumption	2.5 W
Housing Material	Plastic
Type	Laser Barcode Scanner
Reading Distance	100 - 420 mm
Interface	RS-232, Ethernet
Operating Temperature	0 °C ... +50 °C
Light Source	Laser Diode
Resolution	0.15 mm
Scan Rate	500 scans per second
Bar Code Types	1D
Power Supply	DC
Storage Temperature	-20 °C to +70 °C