Measuring lengths (ML), mm
 

70; 120; 170; 220; 270; 320; 370; 420; 470; 520; 620; 720; 820; 920; 1020; 1140; 1240 
(other intermenate lenghts on request)

Accuracy grades to any meter within the ML (at 20°C)

± 10; ± 5; ± 3 μm (optional)

Grating period

20 μm; 40 μm (optional)

Reference marks (RI)


 

- standard for ML ≤ 1020 mm: 35 mm from both ends of ML
- standard for ML > 1140 mm: 45 mm from both ends of ML
- optional: one RI at any location, or two or more RI’s separated by distances of n x 50 mm or distance-coded

Max. traversing speed

 

- when interpolation factor is 1,2,5,10: 1 m/s
- when interpolation factor is 25: 0.5 m/s
- when interpolation factor is 50: 0.4 m/s

Required moving force with sealing lips

< 3 N

Protection (IEC 529)

- without compressed air: IP53
- with compressed air (optional): IP64

Weight

0.4 kg + 0.8 kg/m

Operating temperature

0...+50°C

Storage temperature

-20...+70°C

Permissible vibration (40 to 2000 Hz)

≤ 30 m/s²

Permissible shock (11 ms)

≤ 100 m/s²

Version

L18T-A ∫ 11 µApp

L18T-AV ∫ 1 Vpp

L18T-F Π TTL

Supply voltage

+ 5 V ± 5 % / < 90 mA

+ 5 V ± 5 % / < 120 mA

+ 5 V ± 5 % / < 120 mA

Light source

LED

LED

LED

Resolution

Depends on external subdividing electronics

Depends on external subdividing electronics

5; 1; 2.5; 0.5; 0.2; 0.1 µm (after 4 - fold dividing in subsequent electronics)

Incremental signals

Two sinusoidal I₁ and I₂ 
Amplitude at 1 kΩ load:
- I₁ = 7 - 16 µA
- I₂ = 7 - 16 µA

Differential sine +A / -A and +B / -B
Amplitude at 120 kΩ load:
- A = 0.6 - 1.2 V
- B = 0.6 - 1.2 V

Differential square-wave U1 / U1and U2 / U2. Signal levels at 20 mA load current:
- low (logic "0") ≤ 0.5 V 
- high (logic "1") ≥ 2.4 V

Reference signal

One quasi-triangular I₀ peek per revolution. Signal magnitude at 1 kW load:
- I₀ = 2 - 8 µA (usable component)

One quasi-triangular +R and its complementary -R per revolution. Signals magnitude at 120 W load:
- R = 0.2 - 0.8 V (usable component)

One differential square-wave U0 / U0 per revolution. Signal levels at 20 mA load current:
- low (logic "0") < 0.5 V 
- high (logic "1") > 2.4 V

Maximum operating frequency

50 kHz

50 kHz

50xk kHz, when interpolation factor is 1,2,5,10
1000 kHz, when interpolation factor is 25, 50

Direction of signals

I₂ lags I₁ at reading head displacement from left to right

+ B lags + A at reading head displacement from left to right

U2 lags with U1 at reading head displacement from left to right

Standard cable length

3 m; without connector

3 m; without connector

3 m; without connector

Maximum cable length

5 m

25 m

25 m