ERM 2000

Scanning head

Grating period  200 µm

Grating period  400 µm

Grating period  1000 µm

AK ERM 2280

AK ERM 2480

AK ERM 2420

AK ERM 2410

AK ERM 2980

Interface

  1 VPP

  1 VPP

TTL x 1, TTL x 2

EnDat 2.22)

  1 VPP

Cutoff frequency (–3dB)

Scanning frequency

≥ 300 kHz

–

–

≥ 350 kHz

–

–

≥ 300 kHz

–

Integrated interpolation

–

16 384 (14 bits)

–

Clock frequency

–

≤ 8 MHz

–

Calculation time tcal

–

≤ 5 µs

–

Electrical connection

Cable, 1 m, with or without
12-pin M23 coupling

Cable, 1 m, with
8-pin M12 coupling

Cable, 1 m,
with or without
12-pin M23 coupling

Cable outlet

Tangentially to the left or right

Tangentially to the left or right, axially

Tangentially to the right

Tangentially to the left or right, axially

Power supply

DC 5 V ±0.5 V

DC 3.6 V to 14 V

DC 5 V ±0.5 V

Current consumption
(typical)

≤ 150 mA (without load)

At 5 V: ≤ 90 mA (without load)

≤ 150 mA (without load)

Power consumption (max.)

At 3.6 V: 1080 mW;
at 14 V: 1300 mW

Cable length1)

≤ 150 m

≤ 100 m

≤ 150 m

Vibration 55 Hz to 2000 Hz

Shock 6 ms

Shock 6 ms, with fault exclusion for loosening of the mechanical connection

≤ 400 m/s² (EN 60068-2-6)

≤ 1000 m/s² (EN 60068-2-27)

≤ 400 m/s² (EN 60068-2-27)

≤ 300 m/s²
(EN 60068-2-6)
≤ 1000 m/s²
(EN 60068-2-27)

≤ 400 m/s²
(EN 60068-2-27)

≤ 400 m/s²
(EN 60068-2-6)
≤ 1000 m/s²
(EN 60068-2-27)

≤ 400 m/s²
(EN 60068-2-27)

Operating temperature

–10 °C to 60 °C

–10 °C to 100 °C

Protection EN 60529

IP67

Mass Scanning head

Connecting cable

M23 coupling

 30 g (without connecting cable)

 37 g/m

 50 g

1) With HEIDENHAIN cable

2) Absolute position value after traverse of two reference marks

Scale drum

TTR ERM 2200

Measuring standard

Coefficient of expansion

Steel drum

αtherm  10 · 10–6 K–1

Signal periods

1024

1200

1440

1800

2048

2400

2800

3392

4096

5200

7200

Drum inside diameter*

40 mm

40 mm/55 mm

55 mm

70 mm

80 mm/95 mm

105 mm/120 mm

130 mm/140 mm

160 mm

180 mm/220 mm

260 mm/295 mm

380 mm/410 mm

Drum outside diameter*

64.37 mm

75.44 mm

90.53 mm

113.16 mm

128.75 mm

150.88 mm

176.03 mm

213.24 mm

257.50 mm

326.90 mm

452.64 mm

Accuracy of graduation

±12”

±10”

±8.5”

±7”

±6”

±5.5/7”

±5/6”

±4”

±3.5/4.5”

±3/4”

±2.5/3.5”

Interpolation error per signal period

±9”

±8”

±6.5”

±5.5”

±4.5”

±4”

±4”

±3”

±2.5”

±2”

±1.5”

Reference mark

One or distance-coded

Mechanically
permissible speed

≤ 22 000 rpm

≤ 19 000/
18 000 rpm

≤ 18 500 rpm

≤ 14 500 rpm

≤ 13 000/
12 500 rpm

≤ 10 500 rpm

≤ 9000/8500 rpm

≤ 7000 rpm

≤ 6000 rpm

≤ 4500 rpm

≤ 3000 rpm

Maximum

angular acceleration

50 000 rad/s2

27 000 rad/s2/

48 000 rad/s2

20 000 rad/s2

9000 rad/s2

6000 rad/s2/

9000 rad/s2

4900 rad/s2/

7000 rad/s2

3300 rad/s2/

4400 rad/s2

1900 rad/s2

820 rad/s2/

1800 rad/s2

560 rad/s2/

1300 rad/s2

570 rad/s2/

960 rad/s2

Moment of inertia

0.15 · 10–3 kgm2

0.32/0.24 · 10–3 kgm2

0.63 · 10–3 kgm2

1.5 · 10–3 kgm2

2.6/2.1 · 10–3 kgm2

4.4/3.4 · 10–3 kgm2

7.4/6.3 · 10–3 kgm2

16 · 10–3 kgm2

37/23 · 10–3 kgm2

76/42 · 10–3 kgm2

240/150 · 10–3 kgm2

Permissible axial movement

≤ ±1.25 mm

Mass

 0.21 kg

 0.35/0.22 kg

 0.44 kg

 0.69 kg

 0.89/0.65 kg

 1.0/0.72 kg

 1.2/0.99 kg

 1.8 kg

 3.0/1.6 kg

 3.5/1.7 kg

 5.4/3.2 kg

Scale drum

TTR ERM 2400

Measuring standard

Coefficient of expansion

Scale drum

αtherm  10 · 10–6 K–1

Signal periods

512

600

720

900

1024

1200

1400

1696

2048

2600

3600

3850

4800

Drum inside diameter*

40 mm

40 mm/55 mm

55 mm

70 mm

80 mm/95 mm

105 mm/120 mm

130 mm/140 mm

160 mm

180 mm/220 mm

260 mm/295 mm

380 mm/410 mm

450 mm

512 mm

Drum outside diameter*

64.37 mm

75.44 mm

90.53 mm

113.16 mm

128.75 mm

150.88 mm

176.03 mm

213.24 mm

257.50 mm

326.90 mm

452.64 mm

484.07 mm

603.52 mm

Accuracy of graduation

±13”

±11”

±10”

±8”

±7”

±6/8”

±5.5/7”

±4.5”

±4/5”

±3.5/4”

±3/3.5”

±3.5”

±3”

Interpolation error per signal period

±18”

±15.5”

±13”

±10.5”

±9”

±8”

±6.5”

±5.5”

±4.5”

±3.5”

±3”

±2.5”

±2”

Reference mark

One or distance-coded

Mechanically
permissible speed

≤ 22 000 rpm

≤ 19 000/
18 000 rpm

≤ 18 500 rpm

≤ 14 500 rpm

≤ 13 000/
12 500 rpm

≤ 10 500 rpm

≤ 9000/8500 rpm

≤ 7000 rpm

≤ 6000 rpm

≤ 4500 rpm

≤ 3000 rpm

≤ 3000 rpm

≤ 1600 rpm

Maximum

angular acceleration

50 000 rad/s2

27 000 rad/s2/

48 000 rad/s2

20 000 rad/s2

9000 rad/s2

6000 rad/s2/

9000 rad/s2

4900 rad/s2/

7000 rad/s2

3300 rad/s2/

4400 rad/s2

1900 rad/s2

820 rad/s2/

1800 rad/s2

560 rad/s2/

1300 rad/s2

570 rad/s2/

960 rad/s2

470 rad/s2

230 rad/s2

Moment of inertia

0.15 · 10–3 kgm2

0.32/0.24 · 10–3 kgm2

0.63 · 10–3 kgm2

1.5 · 10–3 kgm2

2.6/2.1 · 10–3
kgm2

4.4/3.4 · 10–3
kgm2

7.4/6.3 · 10–3 kgm2

16 · 10–3 kgm2

37/23 · 10–3 kgm2

76/42 · 10–3 kgm2

235/151 · 10–3 kgm2

153 · 10–3 kgm2

713 · 10–3 kgm2

Permissible axial movement

≤ ±1.25 mm

Mass

 0.21 kg

 0.35/0.22 kg

 0.44 kg

 0.69 kg

 0.89/0.65 kg

 1.0/0.72 kg

 1.2/0.99 kg

 1.8 kg

 3.0/1.6 kg

 3.5/1.7 kg

 5.4/3.2 kg

 2.8 kg

 9.1 kg

* Please select when ordering