1. Model Definition & Product Overview

• SGDB: Sigma-I first-generation SERVOPACK series designation

• 3Z: 30kW rated output power, three-phase AC200V high-power specification

• AD: Dual command input, supporting both pulse-type position command and ±10VDC analog speed/torque reference signal

• Y: OEM customized hardware layout with modified built-in regenerative circuit and rearranged CN1 I/O pin definition for dedicated original equipment

• 351: Exclusive customized firmware version, different from Y174 and Y278 in preset factory parameters, I/O logic and regenerative control threshold.

2. Basic Electrical Ratings

• Main input power: Three-phase AC200~230V, 50/60Hz; independent separated control power supply terminal

• Rated continuous output: 30kW, 300% instantaneous peak overload capability for heavy shock load; PWM output AC 0~230V

• Built-in customized regenerative circuit under Y specification; Y351 firmware sets unique overvoltage protection threshold for regeneration loop; external regenerative resistor is mandatory under frequent high-speed deceleration operation

3. Control Modes & Interfaces

1. Pulse position control: Accept open-collector or line-driver differential pulse including CW/CCW dual-pulse and A/B quadrature pulse; electronic gear ratio adjustable by parameter setting

2. Analog speed/torque control: Receive ±10VDC external analog reference; loop gain, zero offset default values fixed inside exclusive Y351 factory firmware

3. MECHATROLINK-I bus hardware pinout reserved on PCB, yet bus communication function locked by Y351 customized firmware and cannot be enabled normally

• CN1 connector: Integrates pulse command, analog input and digital I/O terminals (Servo ON, fault reset, positioning completion output, dry-contact alarm relay output)

• CN2: Dedicated encoder interface port for incremental/absolute encoder wiring

• RS232 serial port: Connect with SigmaWin software for parameter upload/download, real-time running monitoring and historical fault waveform record

4. Complete Protection Functions

5. Environmental & Mechanical Specification

• Protection class: IP20, cabinet-mounted installation only (no DIN rail mounting option; fixed via mounting bolts)

• Cooling: Dual built-in cooling fans for forced-air cooling

• Operating temperature: 0℃ ~ +55℃, non-condensing; storage temperature: -20℃ ~ +85℃; relative humidity:10%~90%RH without dew

• Compliance: CE industrial safety certification

6. Commissioning & Replacement Instruction

• Support automatic inertia identification and auto gain tuning for rapid servo loop optimization; front-panel JOG inching function for manual motor forward/reverse test without external controller; historical fault data stored in internal memory for after-sales troubleshooting

• Standard non-custom SGDB-3ZAD cannot directly replace SGDB-3ZADY351, due to unique Y351 firmware-defined I/O logic, regenerative parameters and loop gain values. Full parameter reset and wiring modification required when substituting with standard drive.

• Primary application: Heavy-duty customized CNC machine tools, large-load feed axes and exclusive OEM automation production lines (Y174/Y278/Y351/Y352 belong to same 30