Scanning head
AK ERA 4280 graduation period 20 µm
AK ERA 4480 graduation period 40 µm
AK ERA 4880 graduation period 80 µm
Interface
1 VPP
Cutoff frequency –3 dB
? 350 kHz
Electrical connection
Cable 1 m with M23 coupling (12-pin)
Cable length
? 150 m (with HEIDENHAIN cable)
Voltage supply
DC 5 V ±0.5 V
Current consumption
< 100 mA (without load)
Vibration 55 to 2000 Hz
Shock 6 ms
? 200 m/s2 (EN 60 068-2-6)
? 1000 m/s2 (EN 60 068-2-27)
Operating temperature
–10 °C to 80 °C
Mass Scanning head
? 20 g; scanning head for protective cover: ? 35 g (each without cable)
Scale drum
TTR ERA 4200 C graduation period 20 µm
TTR ERA 4400 C graduation period 40 µm
TTR ERA 4800 C graduation period 80 µm
Measuring standard
Coefficient of expansion
Steel drum
?therm ? 10.4 · 10–6 K–1
Signal periods/Interpolation error per signal period1)
ERA 4200
12 000/±1.1”
16 384/±0.8”
20 000/±0.7”
28 000/±0.5”
32 768/±0.4”
40 000/±0.4”
52 000/±0.3”
–
–
ERA 4400
6000/±2.2”
8192/±1.6”
10 000/±1.3”
14 000/±1.0”
16 384/±0.8”
20 000/±0.7”
26 000/±0.5”
38 000/±0.4”
44 000/±0.3”
ERA 4800
3000/±4.4”
4096/±3.2”
5000/±2.6”
7000/±1.9”
8192/±1.6”
10 000/±1.3”
13 000/±1.0”
–
–
Accuracy of graduation
±5”
±3.7”
±3”
±2.5”
±2”
Reference marks
Distance-coded or one
Drum inside diameter*
40 mm
70 mm
80 mm
120 mm
150 mm
180 mm
270 mm
425 mm
512 mm
Drum outside diameter*
76.75 mm
104.63 mm
127.64 mm
178.55 mm
208.89 mm
254.93 mm
331.31 mm
484.07 mm
560.46 mm
Mech. permissible speed
10 000 rpm
8500 rpm
6250 rpm
4500 rpm
4250 rpm
3250 rpm
2500 rpm
1800 rpm
1500 rpm
Moment of inertia
0.27 · 10-3 kgm2
0.81 · 10-3 kgm2
1.9 · 10-3 kgm2
7.1 · 10-3 kgm2
12 · 10-3 kgm2
28 · 10-3 kgm2
59 · 10-3 kgm2
195 · 10-3 kgm2
258 · 10-3 kgm2
Permissible axial movement
? ±0.5 mm (scale drum relative to the scanning head)
Protection* EN 60 529
Complete encoder in mounted condition:
Without protective cover
IP00
With protective cover2) and compressed air
IP40
IP40
IP40
IP40
IP40
IP40
IP40
–
Mass
Scale drum
? 0.28 kg
? 0.41 kg
? 0.68 kg
? 1.2 kg
? 1.5 kg
? 2.3 kg
? 2.6 kg
? 3.8 kg
? 3.6 kg
Protective cover
? 0.07 kg
? 0.1 kg
? 0.12 kg
? 0.17 kg
? 0.22 kg
? 0.26 kg
? 0.35 kg
–
* Please select when ordering
1) Interpolation error within one signal period and the accuracy of the graduation together result in the encoder-specific error; for additional error from mounting and bearing of the measured shaft, see Measuring accuracy
2) Possible only with ERA 4480; please order protective cover separately
