Selin Sistemleri, also known as Selin Systems, is a professional motion control manufacturer based in Europe. It mainly engages in servo drive systems, stepper motors and supporting industrial automation products. Its servo motors are widely used on production lines across Europe and the Middle East. In China, these products are mostly imported together with complete equipment, and limited official technical documents are publicly available.
7AL-2700-20RS-B is a general-purpose AC permanent magnet synchronous servo motor from Selin 7AL Series. It is factory-fitted with a resolver for signal feedback and a power-off brake. Designed as a medium-to-low inertia industrial servo motor with high reliability, it is applicable for positioning and torque control in automotive component production, آلات التعبئة والتغليف, material handling and other fields.
- تفسير رمز النموذج
نموذج: 7AL-2700-20RS-B
| مقطع الكود | وصف | أساس |
| 7AL | سلسلة المنتجات | The 7th generation AL series AC servo motors, the core general-purpose servo product line of the manufacturer. |
| 2700 | Rated Torque | وحدة: mNm, يعادل 2.7 N*m. This naming convention is commonly adopted by European servo manufacturers. |
| 20 | Rated Speed Code | Corresponding rated speed: 2000 دورة في الدقيقة. Industry standard rule: two digits multiplied by 100 دورة في الدقيقة. |
| RS | Feedback Component | Stands for Resolver. It features excellent vibration resistance, high temperature resistance and strong anti-electromagnetic interference capability, مناسبة لظروف العمل القاسية. |
| ب | Configuration Suffix | Equipped with power-off electromagnetic brake. The output shaft will be locked once power is cut off, preventing vertical loads from falling and maintaining position during shutdown. |
- المواصفات الفنية الأساسية
> ملحوظة: The following parameters are deduced based on general specifications of the same series and industry standards. Please refer to the metal nameplate on the motor body for official rated values.
3.1 الأداء الكهربائي
| المعلمة | مواصفة | ملاحظات |
| نوع المحرك | 3-phase Permanent Magnet Synchronous Servo Motor | Sine wave driven, العزل من الفئة F |
| Rated Torque | 2.7 ن · م | Continuous operating rating |
| Peak Torque | تقريبا. 8.1 ن · م | Short-time overload capacity, معيار 3 times overload ratio |
| السرعة المقدرة | 2000 دورة في الدقيقة | Continuous rated operating speed |
| السرعة القصوى | تقريبا. 3000 دورة في الدقيقة | Upper limit of field-weakening speed regulation |
| القوة المقدرة | تقريبا. 0.565 KW | Calculation formula: P = T×n/9550 = 2.7×2000/9550 |
| الجهد المقنن | 3-phase AC220V | Standard low voltage for industrial servo systems |
| Feedback Type | Resolver | Analog sine/cosine signal feedback, adaptable to harsh environments |
| Brake Specification | Power-off Electromagnetic Brake | الجهد المقنن: تيار مستمر 24 فولت; Static holding torque ≥ Rated torque |
| فئة العزل | Class F | Maximum withstand temperature of winding: 155درجه مئوية |
3.2 ميكانيكية & Mounting Parameters
| المعلمة | مواصفة | ملاحظات |
| حجم شفة | Standard 80mm square flange | Standard 80mm frame for motors with torque ranging from 2 N·m to 3 ن · م |
| Output Shaft Diameter | φ19mm with parallel keyway | Standard shaft diameter for 80mm frame industrial motors |
| نوع التركيب | Flange mounting, horizontal / vertical installation available | Equipped with spigot for positioning |
| حماية الدخول | IP65 (excluding shaft extension) | Dust-proof and water spray resistant, suitable for general industrial workshops |
| وزن | تقريبا. 2.8~3.5kg | Typical weight for brake-equipped models |
| منفذ الكابل | Direct cable type | Three independent cables for power, resolver feedback and brake respectively |
3.3 المعلمات البيئية
| المعلمة | مواصفة |
| درجة حرارة التشغيل | 0 ~ +40 درجه مئوية (No freezing or condensation) |
| درجة حرارة التخزين | -20 ~ +80 درجه مئوية |
| مقاومة الاهتزاز | 10~55 هرتز, double amplitude 0.15mm, X/Y/Z three axes |
| Altitude Rating | ≤1000m (Deering مطلوب لارتفاعات أعلى) |
- مطابقة & دليل الاختيار
4.1 محركات الأقراص المتوافقة
It is recommended to use the matching servo drives of Selin Sistemleri. The drive must support resolver communication protocol and be rated for 0.75kW. If the original drive is unavailable, general-purpose servo drives with resolver support can be used as alternatives. Encoder phase auto-tuning must be completed after replacement.
4.2 Parameter Verification Methods
- Check the metal nameplate on the motor side to confirm rated voltage, قوة, عزم الدوران, سرعة, insulation class and other rated data.
- Count cable sets: Brake-equipped motors have 3 cable sets (power cable, resolver feedback cable, brake cable).
- Measure flange mounting hole pitch, spigot diameter and shaft diameter to verify mounting compatibility.
4.3 Alternative Model Recommendations
If the original model has long lead time or high cost, equivalent servo motors with identical mounting dimensions and performance are recommended as follows:
| ماركة | نموذج | المعلمات الأساسية | توافق التركيب |
| ياسكاوا | SGM7J-08AFC6E | 0.75KW, 2.39N*m, 3000دورة في الدقيقة; customizable for 2000rpm + الفرامل + محلل | Fully compatible with 80mm flange |
| دلتا | ECMA-C20807SS | 0.75KW, 2.39N*m, 3000دورة في الدقيقة, مع الفرامل | Identical mounting holes for 80mm flange |
| ابتكار | ISMH1-75B30CB-U231Z | 0.75KW, 2.39N*m; customizable for resolver + الفرامل | Fully compatible with 80mm frame |
- Standard Wiring Definition
General wiring definition for 80mm frame servo motor with resolver and brake (Wire colors may vary among manufacturers. Verify before wiring).
| Cable Group | Core Marking | وظيفة |
| كابل الطاقة | ش, V, دبليو | 3-مدخلات الطاقة المرحلة |
| كابل الطاقة | بي (Green-Yellow) | الأرض الواقية |
| Resolver Cable | R1, R2 | Resolver excitation winding |
| Resolver Cable | S1, S2, S3, S4 | Sine & cosine signal windings |
| Resolver Cable | درع | Single-end grounding for anti-electromagnetic interference |
| كابل الفرامل | BR+, BR- | Brake power input, normally DC24V |
- التطبيقات النموذجية
- Automotive Component Production Lines: Manipulators for material loading/unloading in stamping processes, positioning of welding fixtures, station control on conveyor lines. Resolver feedback adapts to workshop conditions with vibration and oil contamination.
- Vertical Lifting Mechanisms: Z-axis modules, elevators and stackers. The brake prevents load falling when power fails.
- التعبئة والتغليف & Printing Machinery: Feed shafts, tension control and cutting positioning. Medium-to-low inertia design meets requirements for frequent high-speed start and stop.
- General Automation Equipment: High-precision positioning for feed axes of machine tools, textile machinery and ceramic machinery.
- Troubleshooting Matrix
| ظاهرة الخلل | السبب الجذري | الحلول |
| Motor fails to run, drive reports encoder error | 1. Loose or broken resolver cable | 1. Reconnect feedback connector and test cable continuity |
| 2. Abnormal excitation power for resolver | 2. Measure excitation output voltage of the drive | |
| 3. Mismatched encoder protocol on drive | 3. Set the drive feedback type to Resolver | |
| Motor vibrates and generates abnormal noise during operation | 1. Mismatched servo gain parameters | 1. Run auto-gain tuning and reduce rigidity parameters |
| 2. Excessive load inertia | 2. Calculate load inertia ratio and extend acceleration/deceleration time | |
| 3. Worn motor bearing | 3. Rotate the shaft manually after power off to check for jamming and abnormal sound | |
| Large positioning deviation | 1. Resolver signal affected by electromagnetic interference | 1. Single-end grounding for cable shield; route feedback cables separately from power cables |
| 2. Excessive mechanical backlash | 2. Check backlash of lead screw and gear reducer and perform mechanical compensation | |
| 3. Incorrect electronic gear ratio setting | 3. Recalculate and reset electronic gear ratio | |
| Brake malfunction, shaft rotates freely | 1. Abnormal brake supply voltage | 1. Measure voltage across brake terminals to confirm normal DC24V supply |
| 2. Open circuit of brake coil | 2. Measure coil resistance to check for open circuit | |
| 3. Severe wear of friction plate | 3. Replace brake assembly if worn out | |
| Motor overheat alarm | 1. Continuous overload operation | 1. Reduce load or extend acceleration/deceleration time to avoid long-term overload |
| 2. Excessively high ambient temperature and poor heat dissipation | 2. تحسين التهوية وتبديد الحرارة; avoid direct sunlight and enclosed installation | |
| 3. Incorrect current parameters on drive | 3. Check motor rated current and correct relevant drive parameters |
- Prohibited Operations & Safety Rules
- Electrical Rules: Do not apply voltage beyond rated value. Do not run power cables and feedback cables in the same conduit. Do not plug/unplug feedback connectors when powered on. Do not reverse brake power polarity.
- Mechanical Rules: Do not strike the motor shaft radially. Do not operate continuously beyond rated torque and speed. Do not apply radial/axial load exceeding the allowable limit on the shaft end.
- Environmental Rules: Do not use in flammable, explosive or highly corrosive atmosphere. Do not immerse the motor in water or expose it to direct water spray for a long time. The shaft extension is not waterproof.
- Brake Rules: Do not activate the brake while the motor is running at high speed. The brake is only for static holding after shutdown, not for dynamic braking.
- Commissioning Rules: Resolver phase auto-tuning is mandatory after drive replacement. High-speed operation is forbidden before phase calibration, otherwise the motor may run out of control and get damaged.
قائمة النماذج الكاملة & Introduction of Selin Sistemleri 7AL Series Servo Motors
> Document Note: Selin Sistemleri is a regional industrial motion control manufacturer with limited publicly released full-range catalogs. The content below is compiled according to the brand’s unified coding rules and general specification standards of European servo motors. The naming rule is fully consistent with 7AL-2700-20RS-B, for model verifcation and replacement reference. Refer to official manuals or motor nameplates for exact rated parameters.
- Series Overview
The 7AL Series is Selin’s core line of 3-phase permanent magnet synchronous AC servo motors. Featuring medium-to-low inertia and wide compatibility, the power range covers 0.05kW ~ 2.2kW. Multiple feedback options are available, including incremental encoder, resolver and absolute encoder, together with optional power-off brake. This series is widely applied in packaging machinery, التعامل مع المواد, automotive component production lines and general automation equipment.
- Unified Naming Rule
Fixed format: `7AL [Torque Code] [Speed Code][Feedback Code] [Configuration Suffix]`
| مقطع الكود | Rule | Definition of Optional Codes |
| 7AL | Fixed series code | The 7th generation AL general-purpose servo motor series |
| Torque Code | 4 أرقام, وحدة: mNm | Indicates rated torque, على سبيل المثال. 2700 = 2.7 ن · م |
| Speed Code | 2 أرقام, value × 100 دورة في الدقيقة | 15 = 1500rpm; 20 = 2000rpm; 30 = 3000rpm |
| Feedback Code | Letters / letter combinations | E = Incremental Encoder; RS = Resolver; AB = Absolute Encoder |
| Configuration Suffix | خياري | No suffix = Without brake; B = With power-off electromagnetic brake |
- قائمة النماذج الكاملة
Classified by frame size and torque grade:
3.1 60mm Frame (Low Torque Range)
| النموذج الكامل | Rated Torque | السرعة المقدرة | Feedback Type | الفرامل | القوة المقدرة (Calculated) |
| 7AL-0400-30ه | 0.4 ن · م | 3000 دورة في الدقيقة | Incremental Encoder | لا | 0.126 KW |
| 7AL-0400-30E-B | 0.4 ن · م | 3000 دورة في الدقيقة | Incremental Encoder | نعم | 0.126 KW |
| 7AL-0600-30ه | 0.6 ن · م | 3000 دورة في الدقيقة | Incremental Encoder | لا | 0.188 KW |
| 7AL-0600-30E-B | 0.6 ن · م | 3000 دورة في الدقيقة | Incremental Encoder | نعم | 0.188 KW |
| 7AL-0900-20ه | 0.9 ن · م | 2000 دورة في الدقيقة | Incremental Encoder | لا | 0.188 KW |
| 7AL-0900-20RS | 0.9 ن · م | 2000 دورة في الدقيقة | Resolver | لا | 0.188 KW |
| 7AL-0900-20RS-B | 0.9 ن · م | 2000 دورة في الدقيقة | Resolver | نعم | 0.188 KW |
3.2 80mm Frame (Medium Torque Range, Main Models)
| النموذج الكامل | Rated Torque | السرعة المقدرة | Feedback Type | الفرامل | القوة المقدرة (Calculated) |
| 7AL-1300-30E | 1.3 ن · م | 3000 دورة في الدقيقة | Incremental Encoder | لا | 0.408 KW |
| 7AL-1300-30E-B | 1.3 ن · م | 3000 دورة في الدقيقة | Incremental Encoder | نعم | 0.408 KW |
| 7AL-2000-20E | 2.0 ن · م | 2000 دورة في الدقيقة | Incremental Encoder | لا | 0.419 KW |
| 7AL-2000-20RS | 2.0 ن · م | 2000 دورة في الدقيقة | Resolver | لا | 0.419 KW |
| 7AL-2000-20RS-B | 2.0 ن · م | 2000 دورة في الدقيقة | Resolver | نعم | 0.419 KW |
| 7AL-2700-20RS-B | 2.7 ن · م | 2000 دورة في الدقيقة | Resolver | نعم | 0.565 KW |
| 7AL-2700-20E | 2.7 ن · م | 2000 دورة في الدقيقة | Incremental Encoder | لا | 0.565 KW |
| 7AL-2700-20E-B | 2.7 ن · م | 2000 دورة في الدقيقة | Incremental Encoder | نعم | 0.565 KW |
| 7AL-2700-15RS | 2.7 ن · م | 1500 دورة في الدقيقة | Resolver | لا | 0.424 KW |
3.3 90/110mm Frame (High Torque Range)
| النموذج الكامل | Rated Torque | السرعة المقدرة | Feedback Type | الفرامل | القوة المقدرة (Calculated) |
| 7AL-4000-20RS | 4.0 N*m | 2000 دورة في الدقيقة | Resolver | لا | 0.838 KW |
| 7AL-4000-20RS-B | 4.0 N*m | 2000 دورة في الدقيقة | Resolver | نعم | 0.838 KW |
| 7AL-5500-15RS | 5.5 N*m | 1500 دورة في الدقيقة | Resolver | لا | 0.864 KW |
| 7AL-5500-15RS-B | 5.5 N*m | 1500 دورة في الدقيقة | Resolver | نعم | 0.864 KW |
| 7AL-7200-15RS | 7.2 N*m | 1500 دورة في الدقيقة | Resolver | لا | 1.131 KW |
| 7AL-7200-15RS-B | 7.2 N*m | 1500 دورة في الدقيقة | Resolver | نعم | 1.131 KW |
- Matching Drive Series
All 7AL series servo motors are compatible with Selin ASD-7A series servo drives, matched by power rating:
0.1~0.2kW: ASD-7A-0123
0.4~0.75kW: ASD-7A-0423 / ASD-7A-0723
1.0~1.5kW: ASD-7A-1023 / ASD-7A-1523
> The drive must match the motor feedback type. Drives with resolver interface are required for resolver-equipped motors. Encoder phase auto-tuning is required when using third-party drives.
- Model Verification Methods
- Check the metal nameplate on the motor body to confirm rated voltage, عزم الدوران, سرعة, feedback type, insulation class and other parameters.
- Count cable sets: 3 sets for brake-equipped motors (power cable, feedback cable, brake cable); 2 sets for non-brake models.
- Measure flange hole pitch, spigot diameter and shaft diameter to determine frame size: 60mm frame = 60mm flange; 80mm frame = 80mm flange; 90mm frame = 90mm flange.
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