ALPHA6000M-S2R75GBRSM Mini Vector Inverter

ALPHA6000M-S2R75GB; RSM is a custom suffix (not defined in standard factory manuals. It usually stands for built-in braking resistor, fitted keypad, special firmware version or RoHS custom version. Confirm the definition of RSM with your supplier before ordering.)

✅ Model Code Breakdown

ALPHA6000M: ALPHA6000M series, mini open-loop current vector inverter

S2: Single-phase 220V input (200~240V AC)

R75: Matched motor power 0.75kW

G: General-purpose load (constant torque)

B: Built-in braking unit (supports external braking resistor)

RSM: Custom suffix (non-standard factory code)

✅ Key Electrical Specifications

Rated input: Single-phase AC 220V, 50/60Hz

Rated output: 3-phase 0~220V

Rated output current: 4.0A

Control modes: V/F control, Sensorless Open-loop Vector, V/F separation

Starting torque: 180% rated torque at 0.5Hz

Speed regulation range: 1:200 in vector mode; 1:100 in V/F mode

Communication: Built-in RS485, Modbus-RTU

Max output frequency: 0~650Hz

Overload capacity: 150% for 60s, 200% for 3s

Protection: Overcurrent, overvoltage, undervoltage, overheating, overload, phase loss, ground fault, etc.

✅ Product Features

Compact body, small footprint, suitable for cabinets with limited installation space

AVR automatic voltage regulation, stable operation with ±20% grid voltage fluctuation

Supports motor parameter auto-tuning, strong low-frequency torque

Multiple programmable DI/DO, analog AI/AO, multi-speed, PID, counting and other functions

Independent air channel for reliable heat dissipation. Widely used for assembly lines, fans, water pumps, conveyors, small machine tools and other constant-torque applications

✅ Typical Applications

Small conveyors, packaging machinery, fans & water pumps, production lines, small extruders, woodworking machinery, food processing machinery

✅ Replacement & Compatibility

Same-series alternative: ALPHA6000E-S2R75GB (6000E is standard version; 6000M is mini version. Pinout and dimensions differ, not direct plug-and-play)

Domestic equivalent models: Inovance MD200, Invt GD10, Delta VFD-M single-phase 220V 0.75kW models

Full Technical Package for ALPHA6000M-S2R75GBRSM

1. Main Circuit Terminals (S2R75GB, single-phase 220V)

Critical warning: Never connect L/N to U/V/W, this will destroy the inverter immediately; PB and + can only be connected with braking resistor, short-circuit is forbidden.

2. Control Circuit Terminals (S2R4GB ~ S2R75GB)

Common Wiring Schemes

1. Potentiometer speed + terminal control: Potentiometer to 10V, AI1, GND; short X1-COM = forward run
2. 485 communication: 485+ to A, 485to B; add termination resistor on remote side if needed
3. Relay fault signal: TA-TC to PLC fault input
4. Factory Reset Procedure (ALPHA6000M / 6000E compatible)
5. Power on, press PRG to enter parameter menu
6. Locate P0.02 (parameter initialization)
7. Setting options:

0: No action

1: Clear fault records

2: Restore factory defaults (recommended)

4. Confirm, wait for auto-reset. Power cycle to take effect

Frequently used basic parameters:

P0.01: Control mode 0=V/F, 2=open-loop vector (vector recommended)

P0.07: Run command source 0=keypad, 1=terminals, 2=communication

P0.03: Frequency reference source 0=keypad, 2=AI1, 8=multi-speed, 10=PID

P0.10: Max output frequency, default 50Hz, up to 650Hz

⚠️ Resistance below 100Ω will damage the built-in braking transistor. Mount resistor away from other components with sufficient clearance; resistor housing must be grounded.

Wiring: Connect resistor two wires directly between + and PB, not the “-” terminal.

5. Equivalent Replacement List (single-phase 220V 0.75kW mini vector, built-in braking unit preferred)

Note: ALPHA6000M is mini type. Pinout and mounting holes differ from 6000E standard version, cannot be swapped directly

Domestic Alternatives

1. Inovance MD200S0.75B (single-phase 220V, mini, built-in braking)
2. Invt GD10-0R75-S2-B (GD10 mini series)
3. Delta VFD007M21A (VFD-M classic small model)
4. Sifang E310-2S0007
5. Win-V63 0.75kW 220V single-phase

Replacement Notes

Priority check items: built-in braking unit, DI/DO quantity, AO 4-20mA support, Modbus RTU

Original unit: single-phase input, 3-phase 220V output. Replacement motor must be rated 220V 3-phase, cannot drive 380V motor directly

For easy parameter migration: ALPHA6000E-S2R75GB from same brand, but larger size and different mounting holes

6. Fault Code Quick Reference (6000M)

7. Motor Auto-Tuning (Mandatory for Vector Mode)
8. Set P0.01=2 (open-loop vector)
9. Enter motor nameplate data: P2.00 rated power, P2.01 rated current, P2.02 rated frequency, P2.03 rated speed
10. P2.04=1 (static auto-tuning, motor stationary); P2.04=2 rotating auto-tuning (motor runs no-load, higher torque accuracy)
11. Confirm and start; auto-tuning finishes automatically

ALPHA6000M Multi-speed + PID Constant Pressure Water Supply Parameter Set

For ALPHA6000M‑S2R75GB (0.75kW single-phase 220V)

Note: Do not activate both functions at once. PID is for constant pressure water / air supply; multi-speed is for assembly lines, packaging machines and multi-position fixed speed switching.

Scheme A: Multi-speed Control (DI speed selection, terminal start/stop)

Control Logic

Command source: Terminal run

Frequency source: Multi-speed

DI assignment: X1 forward run, X2 reverse run, X3/X4/X5 as speed selectors (3-bit binary, up to 8 speeds)

COM is DI common terminal, NPN mode (factory PLC shorted with 24V)

Parameter List

Wiring Tips

No pressure / speed sensor required; only DI switch signals

If only 4 speeds are needed, use X3 and X4 only; X5 can be assigned to fault reset or other functions

Scheme B: PID Constant Pressure Water Supply (Closed-loop, 4-20mA pressure transmitter)

For small pump pressure stabilization. 4~20mA transmitter to AI1; 4mA = lower pressure, 20mA = full scale pressure

Output of this inverter is 3-phase 220V. Pump motor must be 3-phase 220V type, not 380V pump motor

Control Logic

Command source: Terminal start (X1 forward run)

Frequency source: PID output

AI1: 4~20mA pressure feedback

PID setpoint: Keypad setting (or AI2 potentiometer setpoint)

Parameter List

Wiring

Pressure transmitter: Powered by inverter 24V, signal+ → AI1, signal→ GND

Set AI1 DIP switch to current mode (4-20mA)

Short X1-COM to start; open to stop

PID Tuning Sequence (Important)

1. Disable PID first (P5.00=0), run pump manually to confirm rotation direction
2. Confirm transmitter range: e.g. 0~1MPa, P6.01=0, P6.02=1.0
3. P5.00=1 to enable PID, set target pressure on keypad e.g. 0.4MPa
4. Troubleshooting:

Pressure oscillates: Reduce Kp (e.g. to 15), increase Ti

Pressure rises slowly: Increase Kp, reduce Ti

Severe overshoot: Reduce Kp, increase Ti

5. Sleep function (P5.09=1): At low flow, when pressure exceeds setpoint for a period, inverter drops to min frequency then stops; restarts when pressure drops below wake-up threshold. Suitable for small water systems.

Switching Tip

Multi-speed: P0.03=8

PID constant pressure: P0.03=10

Change P0.03 and power cycle inverter for best stability.

Full ALPHA6000M Series Model List (ALPHA Mini Vector Inverters)

1. Model Coding Rule

ALPHA6000M S2 R75 G B RSM

1. S2: Single-phase 220V input; 3: 3-phase 380V input
2. R75=0.75kW; 1R5=1.5kW; 2R2=2.2kW
3. G: General constant torque load; P: Fan & pump variable torque load
4. B: Built-in braking unit (this model has B)
5. RSM: RS485 Modbus communication option suffix

Important note: S2R4GB and S2R75GB only support V/F, no SVC vector; higher power models support vector control

2. Single-phase 220V (S2 series, mini type, same family as your unit)

Standard models (built-in braking unit GB)

1. ALPHA6000M-S2R4GB ｜ 0.4kW
2. ALPHA6000M-S2R75GB ｜ 0.75kW (base model of your unit)
3. ALPHA6000M-S21R5GB ｜ 1.5kW
4. ALPHA6000M-S22R2GB ｜ 2.2kW

With communication suffix RSM

S2R4GBRSM

S2R75GBRSM (your model)

S21R5GBRSM

S22R2GBRSM

3. 3-phase 380V (3 series, dual rating G/P)

Small power integrated type (built-in braking unit)

1. ALPHA6000M-3R75GB/31R5PB ｜ 0.75kW(G)/1.5kW(P)
2. ALPHA6000M-31R5GB/32R2PB ｜ 1.5kW(G)/2.2kW(P)
3. ALPHA6000M-32R2GB/3004PB ｜ 2.2kW(G)/4kW(P)
4. ALPHA6000M-3004GB/35R5PB ｜ 4kW(G)/5.5kW(P)
5. ALPHA6000M-35R5GB/37R5PB-N ｜ 5.5kW(G)/7.5kW(P)
6. ALPHA6000M-37R5GB/3011PB ｜ 7.5kW(G)/11kW(P)

Medium power (SJ suffix, external braking unit required)

7. 3011GB/3015PB-SJ ｜ 11/15kW
8. 3015GB/3018PB-SJ ｜ 15/18.5kW
9. 3018GB/3022PB-SJ ｜ 18.5/22kW
10. 3022GB-SJ ｜ 22kW

Fan & pump only P type (no G rating)

3030P-N, 3037P-N, 3045P-N … up to 3630P-N

4. ALPHA6000M vs 6000E (Replacement Reference)
5. 6000M: Mini compact version

Max power 22kW; small S2 single-phase units, compact terminals; S2R4/S2R75 no vector support; smaller mounting cutout, not interchangeable with 6000E.

2. 6000E: Standard universal version

Power range 0.75~630kW; vector supported on all ratings; larger enclosure and mounting holes, incompatible with M series housing.

5. Same Power Alternatives for S2R75GBRSM

Same series original: ALPHA6000M-S2R75GBRSM

Same power without communication: ALPHA6000M-S2R75GB

3-phase equivalent: 3R75GB (3-phase 380V input)

6. Rated Current Table (Single-phase S2)