SGDM-02ADA is a 200W / 0.2kW standard universal AC digital servo amplifier from Yaskawa Sigma-II (Σ-II) classic servo series, designed to match SGMAH-02 series 200W servo motors rated at 3000rpm, originally manufactured in Japan and officially discontinued in regular production.Model coding explanation: SGDM = Sigma-II standard servo drive platform; digit "02" stands for rated power 200W; letter "A" means single-phase AC200~230V main power input; "DA" denotes dual command universal type supporting both pulse position instruction and ±10V analog speed/torque signal input, realizing free parameter switching among Position / Speed / Torque three control modes without hardware modification.It features compact DIN rail vertical mounting and passive natural air cooling layout, widely applied in small precision automated positioning, feeding and indexing equipment.

Main power supply: single-phase AC200~230V, 50/60Hz, rated input current 3.4A; three-phase variable output AC0~230V, output frequency range 0~300Hz, continuous rated output current 2.1A, with 300% instantaneous short-time overload capacity for handling startup impact load within limited seconds.Control circuit power is derived directly from main input power, no separate external DC24V auxiliary power required. Adopts IGBT sine-wave PWM driving technology, compatible with standard 20-bit serial incremental encoder and optional serial absolute encoder for high-precision full closed-loop position feedback control. Net weight is approximately 0.7~0.8kg, protection grade IP10, fan-free passive heat dissipation design.

Three dedicated connectors are configured on the servo unit: CN1 control signal terminal block, CN2 encoder feedback socket, CN3 RS232 debugging serial port for PC connection.CN1 accepts two categories of external control commands: high-speed pulse train for position control, supporting differential line driver or open-collector pulse input; max input frequency reaches 500kpps for line-driver pulse and 200kpps for open-collector signal, with adjustable electronic gear ratio function. Meanwhile ±0~10V analog voltage input is available for speed and torque command, all working modes can be switched flexibly by modifying internal drive parameters.CN2 is exclusively used for wiring motor encoder cable to complete real-time position feedback. CN3 RS232 port connects with official SigmaWin tuning software to finish parameter upload/download, real-time operating data monitoring, automatic gain adjustment and mechanical resonance suppression.Complete multi-protection program is embedded inside the driver, including overcurrent, overvoltage, undervoltage, overload, overspeed, encoder disconnection, overheat and short-circuit protection; fault codes are displayed on front LED digital display, fault status keeps locked until power reset or external fault reset signal input.

Allowable operating ambient temperature: 0°C ~ +55°C; storage temperature: -20°C ~ +85°C; working relative humidity ≤90%RH without condensation. Installation location must avoid corrosive gas, heavy dust, liquid splash and direct sunlight irradiation.Install vertically onto standard DIN rail; reserve more than 25mm empty space on top and bottom of the servo unit to guarantee smooth natural convection heat dissipation. During wiring construction, separate high-power motor power cable and low-voltage control signal cable to reduce electromagnetic interference; single-end ground all shielding layers of signal wires to improve anti-interference capability.

Cut off all incoming power and wait over 10 minutes for internal main-circuit capacitor full discharge before any wiring work to avoid electric shock hazard. Connect single-phase AC200~230V commercial power to main power input terminals, U/V/W three output terminals to corresponding three power leads of matched SGMAH-02 servo motor, and PE protective ground terminal reliably to equipment grounding bar.After full wiring inspection, set control mode, electronic gear ratio, maximum motor speed, soft start/stop time and limit switch logic via front panel keypad or SigmaWin PC software. Complete no-load jog test first to check abnormal noise, vibration or mechanical jamming; assemble mechanical load afterward and conduct low-speed trial run before formal full-load operation.

Overcurrent alarm is generally triggered by motor cable short circuit, motor winding damage or mechanical rotor locking; encoder fault alarm mainly results from loose CN2 connector or broken feedback cable; undervoltage protection activates when input supply voltage is too low or loose main power terminals. Remove fault causes then restart power supply to clear alarm lock state.Check terminal screw tightness and cable insulation aging condition every six months. If the servo drive is stored idle over 12 consecutive months, perform 30-minute no-load energization before formal loaded operation to activate internal electrolytic capacitors and extend service life. Fan-free structure needs no fan maintenance, just regularly clean accumulated dust around installation space.

Commonly used for small automatic stoppers, miniature feeder mechanisms, precision adjustment axis of testing instruments, small engraving machine feed axes, precision fixture indexing structure and fixed-length cutting machinery requiring multi-mode high-precision motion control.

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