Page 4 of 4
75.5847.03 LZR-U920_U921 20191125
TROUBLESHOOTING
No blue LED
No power
Check cable and connection.
Polarity of power supply is inverted
Check the polarity of the power supply.
Orange LED is on
Power supply voltage exceeds acceptable
limits
Check power supply voltage.
Sensor exceeds temperature limits
Verify the temperature of the environment. Protect the
sensor from sunlight using a cover, if necessary.
Internal error
Wait a few seconds.
If the LED remains ON, reset the power supply.
If the LED turns on again, replace the sensor.
LED 2 is permanently
red
Faulty wiring
Verify connections (pins 6 and 7).
LED 2 flashes red
Faulty wiring
Verify connections (pins 6 and 7).
Technology:
laser scanner, time-of-flight measurement
Measurement range:
max 65 m (213 ft) [10 m (30 ft) @ 2% remission factor, 30 m (98 ft) @ 10% remission factor]
Number of planes:
LZR
®
-U920:
max.
4* / LZR
®
-U921: 1
* These parameters can be configured via the
RS 485 communication interface.
For more information on the existing options,
see Application Note “LZR®-U920/U921
Protocol“ (76.0019).
Number of points/plane:
max. 274*
Angular resolution:
min. 0.3516 °*
Angular coverage:
max. 96 °*
Rotating speed:
900 turns/min
Scanning frequency:
LZR
®
-U920:
15
Hz / LZR
®
-U921: 60 Hz
Remission factor:
> 2 %
Laser emission characteristics:
IR laser: wavelength 905 nm; output power 0.10mW (CLASS 1)
Visible laser: wavelength 635 nm; output power 0.95mW (CLASS 2)
Supply voltage:
10 – 35 V DC @ sensor side
Power consumption:
< 5 W
Peak current at power-on:
1.8 A (max. 80 ms @ 35 V)
Serial communication
Type
Interface:
Communication mode:
Transmission speed:
Topology:
Symbol coding:
File type:
see Application Note LZR
®
-U920/U921 Protocol (76.0019)
asynchronous
RS 485
half-duplex
460800 bit/sec (max: 921600 bit/sec)
point to point
1 start bit, 1stop bit, no parity bit
8 bits
Cable length:
3 m (10 ft)
Input:
Max. contact voltage:
Voltage threshold:
1 optocoupler (galvanic isolated - polarity free)
30 VDC (over-voltage protected)
Log. H: > 8 V DC Log. L: < 3 V DC
LED signal:
2 bi-colored (red/green) LEDs: function status
1 blue LED: power-on status
1 orange LED: error status
Dimensions:
125 mm (5.00 in) (D) x 93 mm (3.66 in) (W) x 76 mm (2.75 in) (H)
Material/Color:
PC/ASA, black
Protection degree:
NEMA 4 / IP65
Temperature range:
powered: -22 – 140 °F (-30 – 60 ºC) unpowered: 14 – 140 °F (-10 – 60 ºC)
Humidity:
0-95 % non-condensing
Vibrations:
< 2 G
Pollution on front screens:
max. 30 %; homogenous
Norm conformity:
IEC 60529:2001; IEC 60825-1:2007 Laser Class 1&2; IEC 60950-1:2005
IEC 61000-6-2:2005 EMC - Industrial level; IEC 61000-6-3:2006 EMC - Commercial level
Specifications are subject to change without prior notice. All values measured in specific conditions.
Tech Support & Customer Service: 1-800-523-2462
General Tech Questions: [email protected] | Tech Docs: www.BEAsensors.com
©BEA
| Original Instructions |
PLEASE KEEP FOR FUR
THER USE - DESIGNED FOR COLOR PRINTING
TECHNICAL SPECIFICATIONS