ABB ACS350-03E-23A1-4 Micro Drive

(Full model number; suffisso 4 = 380~480V three-phase)

Stato: The ACS350 series is discontinued. No new production from ABB; only surplus stock and second-hand units are available as spare parts.

Product positioning: General-purpose OEM micro drive, widely used on machine tools, trasportatori, fans and pumps for legacy equipment.

✅ Model Code Breakdown

ACS350: Serie di prodotti, legacy general machinery drive

03: Three-phase input power supply

E: Filtro EMC integrato (50Hz version)

23A1: Corrente di uscita nominale 23.1 UN

4: Classe di tensione, 380~480V three-phase

✅ Key Technical Specifications

Potenza nominale: 11 kW (15 HP)

Rated output current I2N: 23.1 UN

Alimentazione in ingresso: 3-fase 380–480 V, 48~63 Hz

Produzione: 0~input voltage, 0~500 Hz

Capacità di sovraccarico: 150% I2N for 60 seconds per 10 minuti; 180% I2N for 2 seconds at startup

Dimensioni del telaio: R3

Classe di protezione: IP20

Standard feature: Chopper di frenatura integrato

Frequenza di commutazione: Predefinito 4 kHz; selectable 4/8/12/16 kHz

Modalità di controllo: V/F scalar control, sensorless vector control for asynchronous motors; native Modbus RTU; optional fieldbus adapters

Tastiera: ACS-CP-A / ACS-CP-C (interchangeable with ACS355)

Condizioni ambientali: No derating from -10℃ to +40℃; 10% power derating at 50℃; ≤1000 m altitude; 1% declassamento per 100 m sopra 1000 M.

✅ Direct Replacement Models (Field Retrofit Priority)

1. Pin-to-pin compatible replacement: ACS355-03E-23A1-4 (11 kW, 23.1 UN, Frame R3)

Disposizione del terminale identica, macros and keypad; direct swap for most installations with minor parameter adjustments. The ACS355 is also phased out with dwindling stock.

2. Long-term new-generation upgrade: ACS380-04S-026A-4 (11 kW, 26 UN)

Similar IO logic; dotato di STO (Coppia di sicurezza disattivata); fornitura stabile. Requires rechecking wiring, application macros and communication parameters.

✅ Spare Parts List

Tastiera: ACS-CP-A (Assistant Panel, raccomandato) / ACS-CP-C (Basic Panel)

Resistenza di frenatura: Select according to deceleration duty; braking chopper is built-in, external resistor required

Fieldbus adapters: FDNA-01 (DeviceNet), FPBA-01 (Profibus DP), FENA-01 (Ethernet)

EMC note: E-type includes integrated EMC filter; U-type has no built-in filter.

✅ Typical Applications

Trasportatori a nastro, macchine per l'imballaggio, woodworking equipment, tifosi, pompe dell'acqua, small machine tool spindles and general constant-torque loads.

✅ Common Fault Troubleshooting (ACS350 Series Common Issues)

1. Sovracorrente: Cortocircuito del motore, damaged power cable, inceppamenti meccanici, tempo di accelerazione troppo breve, failed IGBT module
2. Sovratensione: Excessively fast deceleration, missing or mismatched braking resistor, high mains voltage
3. Guasto di terra: Breakdown of motor insulation, leakage to ground on output cables
4. Modbus communication loss: Check terminating resistor, A/B polarity, station address and baud rate
5. No keypad display: 24V control supply failure, faulty control board or power board

✅ Supplementary Notes

Parameters cannot be copied directly between ACS350 and ACS355; parameter files must be re-uploaded/downloaded. Although the keypad is interchangeable, firmware and parameter groups differ. Always compare the original parameter list during replacement.

ABB ACS350-03E-23A1-4 (11 kW) Engineering Application Cases

Descrizione: The ACS350 is a legacy OEM machinery drive with built-in EMC filter, chopper di frenatura integrato, embedded sequence programming and native Modbus RTU, ideal for constant-torque loads. Below are the most common field applications for this power rating, including process description, control scheme, parametri chiave, risk points and retrofit notes.

Caso 1: Main Belt Conveyor on Packaging Lines (Classic Constant-Torque Application)

Carico: 11 kW conveyor motor for bulk material handling; smooth start/stop, anti-jam and speed synchronization between upstream/downstream sections required.

Schema di controllo

Modalità di controllo: Controllo vettoriale senza sensore (99.04=1)

Riferimento di velocità: AI1 receives potentiometer/PLC analog signal; digital inputs select multi-speed preset (feed, normal speed, low-speed material clearing)

Interlock: Photoelectric jam signal from downstream fed into DI for automatic speed reduction; emergency stop wired to drive safety circuit

Braking: Built-in chopper + external braking resistor for fast stopping to prevent material pile-up

Key Parameter Settings

Accelerazione: 8 S; Deceleration: 6 S; stall protection enabled

Macro applicativa: Factory default macro; use embedded sequence programming to reduce PLC I/O count

Field Benefits: High low-speed torque without belt slip; lower mechanical shock and belt wear compared with star-delta starters. This is a widely used legacy application; preferred replacement part is ACS355-03E-23A1-4.

Rischio: Regular dust cleaning required for dusty environments; overvoltage alarms occur if deceleration is too fast.

Caso 2: Woodworking Machinery – Sanding Machine Feed Roller Drive

Carico: Feed roller of sanding equipment; fluctuating load, stable low-speed torque without speed fluctuation to avoid sanding marks on workpieces.

Schema di controllo

Controllo vettoriale; DI run command; AI speed signal from main machine controller

Multi-speed selection for different workpiece thicknesses (low speed for thick boards, high speed for thin boards)

150% / 60 s overload protection to handle board jamming

Environmental Features: Cabinet-mounted IP20 unit for dusty woodworking workshops; built-in EMC filter on E-version prevents interference with proximity switches and encoders.

Limitazione: No STO safety function. Upgrade to ACS380 for new machine retrofits.

Caso 3: Screw Lifts / Bucket Elevators in Food Production Lines

Carico: 11 kW vertical material handling with potential energy load; anti-rollback on shutdown.

Schema di controllo

Standard built-in braking chopper with external resistor to prevent load coasting downhill

Digital terminal start/stop; 4–20 mA analog speed control; Modbus RTU communication with PLC host

Level interlock: Automatic speed reduction on low material level, auto-stop on full bin

Process Notes: Waterproof control cabinet for humid conditions; strict earthing and high motor insulation resistance required.

Osservazione: The ACS350 was ABB’s flagship OEM drive for bakery, extrusion and feed processing lines.

Caso 4: Extruder Auxiliary Traction Drive (Industria della plastica)

Carico: Traction roller on plastic extrusion lines; constant torque with speed proportional synchronization with main extruder.

Schema di controllo

Opzione 1: AI speed follow signal from main drive (proportional speed regulation)

Opzione 2: Modbus RTU bus synchronization with master drive

Vector control maintains stable tension at low speed to avoid breakage or material accumulation

Embedded sequence programming for start delay and stop sequence to simplify PLC logic

Confronto: Main extruders typically use ACS510/ACS550 while ACS350 serves as a cost-effective auxiliary drive. Re-synchronization logic is required when retrofitting to ACS380.

Caso 5: HVAC & Water Treatment Circulation Pumps (Coppia variabile, PID Closed Loop)

Carico: 11 kW cooling water circulation pump or constant-pressure water supply pump.

Schema di controllo

Modalità di controllo: V/F scalar control; built-in PID macro; 4–20 mA pressure transmitter feedback to AI2

Goal: Maintain constant pipe pressure with variable speed energy saving

One-duty-one-standby rotation must be implemented via external PLC; the ACS350 does NOT support built-in PFC pump cycling function (difference from ACS510)

Risparmio energetico: 20%~40% power reduction under partial load compared with direct-on-line operation.

Caso 6: Small CNC Machine Tools – Spindle Cooling & Conveyor Drives

Carico: Machine tool feed rollers, cooling fans and chip conveyors with 11 kW rating.

Schema di controllo

Keypad/terminal control with multi-speed preset linked to CNC M-codes; FPBA-01 Profibus DP adapter for CNC system networking

EMC compliance guaranteed by integrated EMC filter on E-version

Limitazione: Only for asynchronous motors; not compatible with permanent magnet synchronous motors. No longer specified for new machine builds.

Caso 7: Roller Feeders for Sand & Building Material Auxiliary Lines

Carico: Roller feeders and apron feeders with frequent start-stop and shock loading.

Schema di controllo

Vector control to boost starting torque; stall protection triggers alarm on material jamming

Modbus RTU remote control via central PLC; real-time current and fault code monitoring

Ambiente: Installed in standalone ventilated cabinets for heavy dust conditions; regularly test output cable insulation to prevent earth faults.

General Commissioning & Retrofit Summary (ACS350-03E-23A1-4)

1. Carichi a coppia costante (trasportatori, lavorazione del legno, trazione, ascensori): Use sensorless vector control and take full advantage of the built-in braking chopper.
2. Carichi a coppia variabile (tifosi & pompe): Use V/F scalar control + PID integrato. Note that PFC pump rotation is not supported on ACS350 and requires external PLC logic.
3. Comunicazione: Native Modbus RTU; optional extensions: Profibus DP (FPBA-01), DeviceNet (FDNA-01).
4. Spare Part Replacement

Direct like-for-like swap: ACS355-03E-23A1-4 (identical terminals & tastiera; no direct program copy due to parameter group differences)

Aggiornamento a lungo termine: ACS380-04S-026A-4 (STO equipped; IO and communication logic must be re-engineered)

5. Shortcomings: No STO safety torque-off function; fully discontinued with only surplus and second-hand stock available.
6. Model Prefix Code Definition

01: Single-phase input 200–240 V

03: Ingresso trifase

E: Filtro EMC integrato (this model = 03E); U: Nessun filtro integrato; X: Placeholder for E/U in selection codes

Suffisso 2 = 200–240 V; suffisso 4 = 380–480 V (this model suffix = 4)

Gamma di potenza: 0.37 kW ~ 22 kW, frame sizes R0/R1/R2/R3/R4

1. Trifase 380–480 V (03E-xxx-4 Series, Primary Model Range)

ACS350-03E-XXAXX-4 (with built-in EMC filter)

Filter-free version: Replace 03E with 03U; power and current ratings remain identical.

III. Three-phase 200–240 V (03E-xxx-2)

1. Single-phase 200–240 V (01E-xxx-2, Single-phase Supply)

Filter-free version: Change 01E to 01U.

1. Cross-Model Replacement List (Spare Part Retrofit)
2. Direct pin-compatible replacement: ACS355-03E-23A1-4 (11 kW, 23.1 UN, R3)

Same terminal layout and keypad; minor parameter tuning only. The ACS355 is also discontinued with limited stock.

2. New-generation long-term upgrade: ACS380-04S-026A-4 (11 kW, 26 UN)

Equipped with STO Safe Torque Off; fornitura stabile; requires rework on wiring, macros and communication settings.

1. Osservazioni supplementari
2. Tutti i modelli: Protezione IP20, chopper di frenatura integrato, native Modbus RTU included as standard.
3. Code definitions: E = Built-in EMC Filter; U = No EMC Filter; X = E/U selection placeholder.
4. The entire ACS350 series is officially end-of-life; only surplus stock and second-hand spare parts are available.
5. Original ABB order codes can be retrieved upon model number request.