Technical data
The technical data presented here concerns typical values that apply within the specified limit values. It is possible to operate the encoder with differing parameters. Note that this may result in deviations from the specified transfer behavior of the signal tracks.
The encoder is approved for operation with encoder evaluation units and inverters from SEW-EURODRIVE.
The resolver can be operated on third-party inverters and controllers. Check the technical data for compatibility in this regard. If necessary, contact SEW‑EURODRIVE.
Encoder | Size, unit | RK8M | |
|---|---|---|---|
Motor series and size |
| DRN../DRU../DR2.63 – 355 | |
Encoder type |
| Resolver | |
Excitation signal | Ref1 – Ref2 | ||
Pulse output | sin/cos, differential, amplitude-modulated | ||
Signal tracks | US1-S3 US2-S4 | cos = S1 – S3; sin = S2 – S4 | |
Number of pole pairs | pR | 1 = 2 poles | |
Direction of rotation |
| Cosine before sine when looking at the motor output shaft in clockwise rotation; see also functional description | |
Input voltage/excitation voltage | URef1-Ref2 | 7 Vrms (2 – 10 Vrms) = 19.8 Vpp (5.7 – 28.2 Vpp) | |
Input frequency/excitation frequency | fE | 10 kHz (4 to 20 kHz) | |
Current consumption, free of load |
| 60 mArms (≤ 100 mA) at 4 kHz | |
Encoder system accuracy, analog |
| ±10' | |
Gear unit ratio/transformation ratio | TR | 0.5 ±10% | |
Phase shift |
| 0° ±5° | |
Residual voltage (offset voltage on signal tracks) |
| Max. 25 mVrms | |
Ref1 – Ref2 input impedance, open between Ref1 and Ref2 | ZRO at fE = 10 kHz | 120 Ω (70 + j95 Ω) ±15% | |
Ref1 – Ref2 input impedance, short circuit between S1 and S3 and between S2 and S4 | ZRS at fE = 10 kHz | 110 Ω (65 + j90 Ω) ±15% | |
S2 – S4 output impedance at position 0° minimum coupling, open between Ref1 and Ref2 | ZSO at fE = 10 kHz | 230 Ω (120 + j200 Ω) ±15% | |
S1 – S3 output impedance at position 0° maximum coupling, short circuit between Ref1 and Ref2 | ZSS at fE = 10 kHz | 305 Ω (150 + j270 Ω) ±15% | |
Ref1 – Ref2 input inductance, open between Ref1 and Ref2 | LRO at fE = 10 kHz | 1.5 mH ±20% | |
Ref1 – Ref2 input inductance, short circuit between S1 and S3 and between S2 and S4 | LRS at fE = 10 kHz | 1.4 mH ±20% | |
S2 – S4 output inductance at position 0° minimum coupling, open between Ref1 and Ref2 | LSO at fE = 10 kHz | 3.1 mH ±20% | |
S1 – S3 output inductance at position 0° maximum coupling, short circuit between Ref1 and Ref2 | LSS at fE = 10 kHz | 4.3 mH ±20% | |
DC resistance of the input | RRef1-Ref2 | 36 Ω ±10% | |
DC resistance of the output | RS1-S3 | 62 Ω ±10% | |
Temperature coefficient |
| 0.39%/K | |
Connection |
| ||
Shaft load |
| Max. ≤ 30 N axial; max. ≤ 40 N radial | |
Degree of protection according to EN 60529 | IP66 | ||
Corrosion protection, surface protection for motor | KS, OS1 – OS4, OSG | ||
Corrosion protection for encoder |
| IEC 60068-2-52 salt spray according to C5 (C5-I) as per ISO 12944-2 | |
Installation altitude | h | ≤ 4000 m above sea level | |
Maximum speed | nmax | 6000 min-1 | |
Maximum mechanical speed | nmax | 6000 min-1 | |
Vibration resistance in accordance with EN 60068‑2‑6 |
| 10g = 98.1 m/s² | |
Shock resistance in accordance with EN 60068‑2‑27 |
| 100g = 981 m/s² | |
Maximum angular acceleration |
| ≤ 2 × 104 rad/s2 | |
Maximum degree of pollution during installation work | Degree of pollution 1 (IEC 61010-1, EN 60664-1, VDE 0110-1) | ||
Ambient temperature of motor | DRN../DR2./DRU.63 – 355 | °C | -30 to +60 DR2C..: -30 to +60 |
Ambient temperature of encoder | °C | -30 to +85 | |
Storage temperature of encoder | °C | -15 to +70 (dry, dust-free, protected against sun) | |
Maximum cable length |
| 100 m | |
Explosion protection mark ATEX/IECEx |
| – | |
IECEx certificate of conformity |
| – | |
Electronic nameplate | – | ||
Functional safety | – | ||