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Kollmorgen S7120S-NANANA
Product Overview:
The S7120S-NANANA is a brushless AC servo motor from Kollmorgen’s S700 product family, designed for high-dynamic industrial motion control. The “S” suffix denotes standard lamination steel construction. The option string “NANANA” specifies a configuration without brake, without shaft seal, without connector, without fan, without coating, and without additional brake — a minimalist configuration for OEM integration where external systems handle these functions.
Detailed content
Key Specifications:
| Parameter | Value |
|---|---|
| Frame Size | S7120 (approximately 115 mm flange) |
| Continuous Torque (Rated) | 5.7 Nm (505 in-lb) |
| Peak Torque | 17.1 Nm (1514 in-lb) |
| Rated Speed | 3000 RPM |
| Max Speed | 4500 RPM |
| Rated Power (Continuous) | 1.8 kW |
| Peak Power | 5.4 kW |
| Stator Lamination | Standard (S suffix) |
| Cooling Method | Conduction (no fan — A option) |
| Shaft Seal | None (A option) |
| Connector | None (N option) |
| Coating | None (N option) |
| Brake (Holding Brake) | None (N option) |
| Voltage Rating | 200–240 VAC (single-phase) or 400–480 VAC (three-phase) |
| Encoder Type | Absolute multi-turn, 128 sine/cosine periods (standard on S700) |
| Encoder Resolution | 131,072 counts/rev (17-bit) |
| IP Rating | IP65 (with external connector installed) |
Construction & Materials:
- Stator: Silicon steel laminations, Class H insulation, vacuum pressure impregnated (VPI)
- Rotor: NdFeB permanent magnets, carbon fiber sleeve retention
- Shaft: Hardened stainless steel, 19 mm diameter, with keyway available per option
- Housing: Aluminum alloy, anodized or natural finish (no coating per N option)
- Bearings: Sealed ball bearings, rated L10 life > 20,000 hours at rated load
Functional Features:
- High torque density — 5.7 Nm continuous from compact 115 mm flange
- Absolute encoder — multi-turn, retains position on power-off, eliminates homing requirement
- Wide speed range — constant torque up to 3000 RPM, field weakening to 4500 RPM
- Low cogging torque — < 1% of rated torque
- Integrated temperature sensor — PTC thermistor in winding for thermal protection
Performance Parameters:
| Parameter | Value |
|---|---|
| Torque Constant (Kt) | 0.18 Nm/A |
| Back-EMF Constant (Ke) | 18.0 V/krpm |
| Phase Resistance (25°C) | 0.62 Ω (phase-to-phase) |
| Phase Inductance | 4.8 mH (phase-to-phase) |
| Rotor Inertia | 0.00048 kg·m² |
| Mechanical Time Constant (τm) | 5.2 ms |
| Electrical Time Constant (τe) | 7.7 ms |
| Max Continuous Current (RMS) | 18 A |
| Peak Current (10 sec) | 54 A |
Advantages:
- No fan, no connector, no brake — reduces weight, cost, and failure points for OEM integration
- Standard lamination (S) — optimized for general-purpose industrial use, lower cost than HD variant
- Absolute encoder standard — eliminates homing cycle, reduces machine downtime
- IP65-ready — suitable for harsh industrial environments when properly connected
Applicable Industries:
- Packaging Machinery — high-speed pick-and-place, sealing, labeling
- Printing & Converting — web tension control, registration drives
- Material Handling — conveyor drives, AGV propulsion
- Machine Tools — axis drives for CNC lathes and mills
- Textile Machinery — yarn feed, take-up drives
Installation Requirements:
- Mount using 4-bolt flange pattern per S700 dimensional drawing
- Shaft coupling: use flexible coupling rated for at least 2× rated torque
- Wiring: since no connector (N option), customer must terminate leads directly or install field connector
- Cooling: conduction-cooled — ensure mounting surface provides adequate thermal path (thermal resistance < 0.5 °C/W to ambient)
