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Kollmorgen S72402-PBNANA
Product Overview:
The S72402-PBNANA is a mid-frame AC servo motor from the S700 series. The option code “PBNANA” decodes as: P = With shaft seal (protective), B = With holding brake (24 VDC), N = No connector, A = No fan (conduction cooled), N = No coating, A = No additional brake (redundant with B). This is a feature-rich configuration with brake and seal but without fan or connector — designed for OEMs who manage cooling and wiring externally.
Detailed content
Key Specifications:
| Parameter | Value |
|---|---|
| Frame Size | S724 (approximately 130 mm flange) |
| Continuous Torque (Rated) | 12.7 Nm (1124 in-lb) |
| Peak Torque | 38.1 Nm (3372 in-lb) |
| Rated Speed | 3000 RPM |
| Max Speed | 4500 RPM |
| Rated Power (Continuous) | 4.0 kW |
| Peak Power | 12.0 kW |
| Holding Brake | Yes (24 VDC, B option) |
| Shaft Seal | Yes (P option — IP65 shaft) |
| Cooling | Conduction (no fan — A option) |
| Connector | No (N option) |
| Coating | None (N option) |
| Voltage Rating | 200–240 VAC or 400–480 VAC |
| Encoder | Absolute multi-turn, 131,072 counts/rev |
| Shaft Diameter | 22 mm, with keyway |
| Motor Weight | Approximately 8.2 kg (18.1 lb) |
Construction & Materials:
- Stator: Silicon steel laminations, Class H insulation, VPI
- Rotor: NdFeB magnets, carbon fiber retention
- Shaft Seal: Lip seal, nitrile rubber (NBR), rated for IP65 at shaft
- Brake: Spring-applied, electrically released, 24 VDC, holding torque 23.9 Nm
- Housing: Cast aluminum, natural finish
- Bearings: Sealed ball bearings, pre-lubricated, L10 > 20,000 hours
Performance Parameters:
| Parameter | Value |
|---|---|
| Torque Constant (Kt) | 0.40 Nm/A |
| Back-EMF Constant (Ke) | 40.0 V/krpm |
| Phase Resistance (25°C) | 0.35 Ω (phase-to-phase) |
| Phase Inductance | 3.5 mH (phase-to-phase) |
| Rotor Inertia | 0.0011 kg·m² |
| Mechanical Time Constant (τm) | 7.8 ms |
| Electrical Time Constant (τe) | 10.0 ms |
| Max Continuous Current (RMS) | 22 A |
| Peak Current (10 sec) | 66 A |
| Brake Release Time | < 30 ms |
| Brake Engage Time | < 15 ms |
Advantages:
- Holding brake included — maintains position on power-off without external brake
- Shaft seal (IP65) — protects against coolant, dust, and moisture at shaft entry
- No fan — eliminates fan noise and failure mode, enables sealed enclosure integration
- Absolute encoder — zero homing required, instant position knowledge on startup
Applicable Industries:
- CNC Machine Tools — vertical axis (Z-axis) with brake, horizontal axes with seal
- Robotics — joint actuators requiring brake for safety hold
- Food & Beverage — washdown environments (IP65 shaft)
- Woodworking — router spindles, feed drives with coolant exposure
- Plastics — injection molding axis drives
Installation Requirements:
- 4-bolt flange, M8 × 1.25 bolts, torque to 25 Nm per bolt
- Brake wiring: 24 VDC, 2-wire connection, connect to drive brake output
- Shaft seal requires clean mounting surface — surface roughness Ra ≤ 0.8 μm
- Conduction cooling: thermal path resistance ≤ 0.4 °C/W to ambient
Usage Notes:
- Brake power must be supplied even when motor is running — do not disconnect brake supply
- Shaft seal protects against splash but not submersion — do not immerse motor
- No connector (N) — customer must terminate 9 leads individually or install field connector
- Verify drive supports 24 VDC brake output before connecting
