BEA LZR-U920 User Manual Download Page 4

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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

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