EK8S, EK8R, EK8C

Motor series and size

DRN../DRU../DR2.63 – 355

Pulse output

Sin/cos

TTL (RS422)

HTL/TTL

Supply voltage

U_B

DC 7 V – 30 V

DC 7 V – 30 V

DC 4.75 V – 30 V

Supply voltage for design as safety encoder

U_{B_FS}

DC 7 V – 30 V

Without specification

Without specification

Maximum current consumption, free of load

I_in

100 mA (at U_B = 7 V)

Maximum pulse frequency

f_{pulse_max}

150 kHz

120 kHz

120 kHz

Direction of rotation

A before B when looking at the motor output shaft in clockwise rotation

Incremental tracks; periods per revolution

A, B

1024 (10 bits)

C

1

Position resolution, increments per revolution

A, B

4096 (12 bits)

Voltage output signal
differential

(peak-to-peak)

(B’ = B - B) (A’ = A - A)

U_{t_diff}

1 V ± 10%

Typical: ≥ 2 V

Typical: ≥ 2 V

Voltage output signal
non-differential

(peak-to-peak)

U_t

0.5 V ± 10%

U_Low ≤ 0.5 V

U_High ≥ 2.5 V

U_B ≤ 6 V: TTL

U_Low ≤ 0.5 V

U_High ≥ 2.5 V

U_B > 6 V: HTL

U_Low ≤ 3 V

U_High ≥ (U_B - 2.5 V)

Signal level output,
nominal offset against 0 V
(A, B, C, A,B, C)

U_{t_o}

2.5 V ± 0.3 V

Without specification

Without specification

Total harmonic distortion (THD)

40 dB (1%), 60 dB
(0.1%) from 7th harmonic

Without specification

Without specification

Load resistance/load current, differential

R_L/I_L

120 Ω ± 10%

120 Ω ± 10%

U_B ≤ 6 V:

120 Ω ± 10%

U_B > 6 V:

1 – 3 kΩ

Resistance between tracks and reference ground

R_gnd

≥ 1 kΩ

Without specification

Without specification

Load capacitance, output

C_o

≤ 20 nF

Without specification

Without specification

Voltage output signal,
differential (C’ = C - C)

(peak-to-peak)

U_{t_diff}

e

0.3 – 1.4 V

Typical: ≥ 2 V

Typical: ≥ 2 V

C track offset

g

192 mV ± 5 mV

Without specification

Without specification

Voltage output signal, non-differential (C, C)

(peak-to-peak)

U_{t_C}

Without specification

U_Low ≤ 0.5 V

U_High ≥ 2.5 V

U_B ≤ 6 V: TTL

U_Low ≤ 0.5 V

U_High ≥ 2.5 V

U_B > 6 V: HTL

U_Low ≤ 3 V

U_High ≥ (U_B - 2.5 V)

Phase angle track C’,

n = constant

k, l

k = 180° ±90°

l = 180° ±90°

See "Signal logic track C"

See "Signal logic track C"

Signal width track C

W_C

See Phase relationships

90° electrical

90° electrical

Signal logic track C

See Phase relationships

C = log 1, when A = B = log 1

C = log 1, when A = B = log 1

Pulse duty factor in accordance with IEC 60469-1, n = constant

Without specification

50% ± 10%

50% ± 10%

Phase offset A : B; A : B

n = constant

d

90° ±2°

90° ±20°

90° ±20°

Vibration resistance in accordance with EN 60068‑2‑6

≤ 10 g (f > 18.5 Hz)

Shock resistance in accordance with EN 60068‑2‑27

≤ 100 g (t = 6 ms, 18 pulses)

Accuracy of the incremental sectionDue to the stiffness of the torque bracket, you have to take into account an automatically resetting twist of ±0.6° (depending on the direction of rotation) of the encoder housing compared to the encoder shaft.

±0.0194° (±70")

±0.033° (±120")

±0.033° (±120")

Accuracy of the absolute section

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Maximum permissible magnetic field external to the motor (outer motor contour)

25 mT / 20 kA/m (on the encoder housing: 10 mT / 8 kA/m)

Maximum speed

n_max

6000 min^-1

Maximum cable lengthObserve the requirements for the cables and the supply voltage.

100 m

300 mCable length 300 m: Observe the voltage drop on the encoder signal cable and the requirements of the minimum input levels of the encoder evaluation card.

50 – 300 m50 m: MOVI-C® MOVITRAC® advanced inverters from SEW-EURODRIVE with connection to the binary input terminals and 24 V supply; 300 m: Inverters from the MOVI-C® modular automation system from SEW-EURODRIVE or generation B inverters with DEU21B encoder cards, or with an encoder supply up to max. 12 V; 100 m: in all other cases.

Duration until fault messageThe encoder has a self-diagnostic function. If a fault is detected, the sensor reports it to the encoder evaluation unit by deactivating the output signals.
(deactivated outputs)

≤ 25 ms

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Activation time of encoder-internal diagnostics after switching on

≤ 200 ms

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Degree of protection according to EN 60529

IP66

Installation altitude

h

≤ 4000 m above sea level

In areas at risk of explosion: Permitted external pressure 0.8 – 1.1 bar (at typical altitude ≤ 1800 m above sea level)

Explosion protection marking ATEX/IECEx

ATEX equipment category 3 (3G, 3D, 3GD)

II3G Ex ec IIC T4 Gc

II3D Ex tc IIIC T120°C Dc

IECEx EPL .c (3G-c, 3D-c, 3GD-c)

Ex ec IIC T4 Gc

Ex tc IIIC T120°C Dc

IECEx certificate of conformity depending on encoder

IECEx IBE 18.0032X

IECEx CSA 21.0010X

Corrosion protection; surface protection

KS, OS1 – OS4, OSG

Connection

• M23 connector on the terminal box (optionally with or without temperature sensor)
• Terminal strip in the terminal box (optionally with or without temperature sensor)
• M23 connector with 0.36 m cable directly on the encoder (without temperature sensor)
• Integrated encoder connector on the fan guard side (can be preassembled and plugged in the field); optionally with M23 connector; without temperature sensor
• Integrated encoder connector at the rear of the fan guard (can be preassembled and plugged in the field); optionally with M23 connector; without temperature sensorNote that the permissible ambient temperature of the motor is limited with this connection variant. Contact SEW‑EURODRIVE with regard to this.

Ambient temperature of motor

DRN../DR2../DRU63 – 132L

°C

-30 to +80

With FS encoder: -30 to +60

-30 to +60

-30 to +60

DRN../DR2../DRU160 – 355

°C

-30 to +60

-30 to +60

-30 to +60

EDRN71 – 280

°C

-30 to +60

-30 to +60

-30 to +60

EDRN280M

°C

-30 to +40

-30 to +60

-30 to +60

Storage temperature

°C

-15 to +70

Maximum angular acceleration

2x10⁴ rad/s²

Electronic nameplate

RS485 (serial, asynchronous); 1920 bytes

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Maximum degree of pollution during installation work

Degree of pollution 1 (IEC 61010-1, EN 60664-1, VDE 0110-1)

Functional safety

✔

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