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June 22, 2023
LTF Time Of Flight Laser Distance Sensor Instruction Manual
47
Chapter Contents
Repeatability Performance ................................................................................................................................................................................ 48
Dimensions ....................................................................................................................................................................................................... 50
Supply Voltage
12 V DC to 30 V DC
Power and Current Consumption (Exclusive of Load)
Normal Run Mode: < 2.1 W
Current consumption < 85 mA at 24 V DC
Supply Protection Circuitry
Protected against reverse polarity and transient overvoltages
Construction
Die-cast zinc housing; acrylic window
Maximum Torque
2.6 N·m (23.0 in-lbs)
Sensing Beam
Visible red, 660 nm
Sensing Range -- LTF12
90% White Target: 50 mm to 12000 mm
18% Gray Target: 50 mm to 11000 mm
6% Black Target: 50 mm to 7000 mm
Sensing Range -- LTF24
90% White Target: 50 mm to 24000 mm
18% Gray Target: 50 mm to 18000 mm
6% Black Target: 50 mm to 11000 mm
Ambient Light Immunity
> 40000 lux
Delay at Power Up
2 seconds
Measurement Output Rate
0.5 ms
Output Configuration
Analog output: 4 to 20 mA or 0 to 10 V, depending on model
Discrete output rating: Discrete NPN/PNP is user-configurable
Output Ratings
Discrete Output: 100 mA maximum (protected against contin-
uous overload and short circuit)
OFF-state leakage current (PNP): < 10 μA at 30 V
OFF-state leakage current (NPN): < 200 μA at 30 V
Output saturation voltage (PNP outputs): < 3 V at 100 mA
Output saturation voltage (NPN outputs): < 1.6 V at 100 mA
Analog current output (LTF...I Models):1 kΩ maximum at 24 V;
maximum load resistance = [(Vcc-4.5)/0.02 Ω]
Analog voltage output (LTF...U Models): 2.5 kΩ minimum load
resistance
Remote Input
Allowable Input Voltage Range: 0 to Vcc
Active Low (internal weak pullup—sinking current): High State
> 4.3 V at 740 μA maximum; Low State < 1.3 V at 800 μA
maximum
Active High (internal weak pulldown—sourcing current): High
State > 4.3 V at 1.7 mA maximum; Low State < 1.3 V at 1.6
mA maximum
Minimum Window Size, Analog and Discrete
10 mm
Boresighting
100 mm radius at 12000 mm
Temperature Effect
50 mm to 12000 mm: ±0.25 mm/°C (typical)
>12000 mm: ±0.5 mm/°C (typical)
Resolution
LTF12: < 0.3 mm to 3 mm
LTF24: < 0.3 mm to 4 mm
Resolution measured as twice repeatability with white target
at slow response speed at 20 °C. See repeatability curves for
more detail.
Beam Spot Size
6.5 mm at 50 mm
10 mm at 7500 mm
12.5 mm at 12000 mm
35 mm at 24000 mm
Beam spot size is calculated as 1.6 times the D4σ measured
diameter
Response Time
Fast: 1.5 ms
Standard: 8 ms
Medium: 32 ms
Slow: 256 ms
Storage Conditions
–30 °C to +65 °C (–22 °F to +149 °F)
Operating Conditions
–20 °C to +55 °C (–4 °F to +131°F)
90% at +55 °C maximum relative humidity (non-condensing)
Shock
MIL-STD-202G, Method 213B, Condition I (100G 6x along X,
Y, and Z axes, 18 shocks), with device operating
Repeatability
See Performance Curves
Environmental Rating
IP67 ; NEMA 6
Vibration
MIL-STD-202G, Method 201A (Vibration: 10 Hz to 55 Hz, 0.06
inch (1.52 mm) double amplitude, 2 hours each along X, Y
and Z axes), with device operating
Specifications
Chapter 6
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