
Siemens 1FL6042-2AF21-1AB1 Servo Motor Siemens 1FL6042-2AF21-1AB1 Servo Motor
The 1FL6042 series is a core product line in Siemens’ SIMOTICS S‑1FL6 family, designed specifically for the SINAMICS V90 Servo Drive System. It is divided into Low Inertia (LI) and High Inertia (HI) versioni, covering power ratings of 0.4 kW and 0.75 kW, and supporting 230 V / 400 V power supply.
- Convenzione di denominazione dei modelli
| Segmento di codice | Descrizione | Values for 1FL6042 Series |
| 1FL6 | Siemens SIMOTICS S series servo motor identifier | Fisso |
| 42 | Product code representing specific power and frame size | Fisso |
| 1AF61 / 2AF21 | Design code | Main distinction |
| – 1AF61: HI, 400 V 3‑phase | ||
| – 2AF21: LI, 230 V 1/3‑phase | ||
| 1-2 | Codificatore & connector type | Connector orientation |
| – 1: Straight connector | ||
| – 2: Right‑angle connector (HI only) | ||
| UN / G / l / M | Encoder type | Feedback selection |
| – A/G/H: Incrementale (2500 incr./rev) | ||
| – l: Absolute (20‑bit single‑turn, 12‑bit multi‑turn) | ||
| – M: Incrementale (2500 incr./rev), plain shaft | ||
| UN / B | Brake configuration | Brake option |
| – UN: No brake | ||
| – B: Con freno |
- Elenco completo dei modelli & Confronto dei parametri chiave
2.1 Low Inertia Series (LI, 2AF21, 0.75 kW, 230 V)
Optimized low‑inertia rotor design for high‑dynamic performance.
Frame size 40 mm, rated torque 2.39 Nm, peak torque 7.20 Nm, rated speed 3000 rpm.
| Modello | Tipo di codificatore | Shaft Type | Freno | Caratteristiche principali |
| 1FL6042‑2AF21‑1AA1 | Incrementale (2500) | Keyed | NO | Versione base, straight connector |
| 1FL6042‑2AF21‑1AB1 | Incrementale (2500) | Keyed | SÌ | Con freno, for vertical loads |
| 1FL6042‑2AF21‑1AG1 | Incrementale (2500) | Plain | NO | Plain shaft for special couplings |
| 1FL6042‑2AF21‑1AH1 | Incrementale (2500) | Plain | SÌ | Plain shaft + freno |
| 1FL6042‑2AF21‑1LA1 | Absolute (20‑bit) | Keyed | NO | Absolute encoder, non è richiesto alcun homing |
| 1FL6042‑2AF21‑1LB1 | Absolute (20‑bit) | Keyed | SÌ | Absolute encoder + freno |
| 1FL6042‑2AF21‑1MA1 | Incrementale (2500) | Plain | NO | Plain shaft, straight connector |
| 1FL6042‑2AF21‑1MB1 | Incrementale (2500) | Plain | SÌ | Plain shaft + freno, straight connector |
2.2 High Inertia Series (HI, 1AF61, 0.4 kW, 400 V)
High‑inertia rotor for stable operation and better inertia matching.
Frame size 45 mm, rated torque 1.27 Nm, peak torque 1.9 Nm, rated speed 3000 rpm.
| Modello | Tipo di codificatore | Connector | Freno | Caratteristiche principali |
| 1FL6042‑1AF61‑0AA1 | Incrementale (2500) | Straight | NO | Di base, 400 V 3‑phase |
| 1FL6042‑1AF61‑0AB1 | Incrementale (2500) | Straight | SÌ | Con freno |
| 1FL6042‑1AF61‑0AG1 | Incrementale (2500) | Straight | NO | Plain shaft |
| 1FL6042‑1AF61‑0AH1 | Incrementale (2500) | Straight | SÌ | Plain shaft + freno |
| 1FL6042‑1AF61‑0LA1 | Absolute (20‑bit) | Straight | NO | Absolute encoder |
| 1FL6042‑1AF61‑0LB1 | Absolute (20‑bit) | Straight | SÌ | Absolute encoder + freno |
| 1FL6042‑1AF61‑2AA1 | Incrementale (2500) | Right‑angle | NO | Right‑angle connector, salvaspazio |
| 1FL6042‑1AF61‑2AB1 | Incrementale (2500) | Right‑angle | SÌ | Right‑angle + freno |
| 1FL6042‑1AF61‑2AG1 | Incrementale (2500) | Right‑angle | NO | Plain shaft + right‑angle |
| 1FL6042‑1AF61‑2AH1 | Incrementale (2500) | Right‑angle | SÌ | Plain shaft + right‑angle + freno |
| 1FL6042‑1AF61‑2LA1 | Absolute (20‑bit) | Right‑angle | NO | Absolute encoder + right‑angle |
| 1FL6042‑1AF61‑2LB1 | Absolute (20‑bit) | Right‑angle | SÌ | Absolute encoder + right‑angle + freno |
- Differenze chiave & Guida alla selezione
3.1 LI vs HI Core Comparison
| Articolo | Low Inertia (2AF21) | High Inertia (1AF61) | Suggerimento per la selezione |
| Energia | 0.75 kW | 0.4 kW | Match load power |
| Voltaggio | 230 V (1/3‑phase) | 400 V (3‑phase) | Match site power |
| Coppia nominale | 2.39 Nm | 1.27 Nm | Higher torque density: LI |
| Coppia di picco | 7.20 Nm | 1.9 Nm | Better dynamics: LI |
| Rotor Inertia | Basso (0.897 kg·cm²) | Alto | HI for high‑inertia loads; LI for fast start/stop |
| Dimensioni del telaio | 40 mm | 45 mm | HI is slightly larger |
3.2 Encoder Selection
| Tipo di codificatore | Vantaggi | Applicazioni tipiche |
| Incrementale | Costo inferiore, risposta rapida | General positioning, no position retention after power loss |
| Absolute | Position retained after power loss, no homing | Posizionamento ad alta precisione, quick recovery after safety stop |
3.3 Brake Selection
| Configurazione | Applicazioni tipiche |
| With Brake | Vertical axes, drop prevention, emergency holding |
| No Brake | Horizontal axes, conveniente, high‑speed applications |
- Compatibilità & Applicazioni
All 1FL6042 series motors are fully compatible with SINAMICS V90 servo drives, support PROFINET / EtherCAT, and have IP65 protection.
Low Inertia (2AF21): Produzione elettronica, macchine per l'imballaggio, labeling machines, high‑speed conveyors
High Inertia (1AF61): Printing machinery, attrezzature tessili, small machine tools, material handling systems
Contattore,interruttore automatico,inverter solare,contatore elettrico,batterie solari


