Product Overview
The DST1405 is a high-performance servo drive belonging to the Digitax ST series, originally developed by Control Techniques and now part of the Nidec motor control portfolio under the Emerson brand. Engineered for precision motion control, the DST1405 delivers closed-loop control of AC servo motors in position, speed, and torque modes, making it a core component in demanding automation systems. With its 400 V class, three-phase input and compact footprint, the DST1405 is purpose-built for applications that require high dynamic response and reliable power delivery in a space-saving package.
At its core, the DST1405 provides 8.0 A RMS of continuous output current and an impressive 24.0 A peak current—approximately three times its nominal rating. This high overload capability enables the drive to handle rapid acceleration and deceleration profiles typical of machine tool feed axes, packaging machinery, and high-speed pick-and-place systems. The drive supports a wide carrier frequency range of 3 to 12 kHz, allowing users to balance switching losses against acoustic noise and motor heating.
The DST1405 also stands out for its flexible feedback support and integrated safety. It accommodates incremental encoders, absolute encoders, Sin/Cos, analog position feedback, and resolver interfaces (via option modules), while its onboard Safe Torque Off (STO) function meets EN 61800-5-2 SIL3, EN ISO 13849-1 PLe, and EN 954-1 Cat.3 requirements—delivering certified machine safety without the need for complex external safety relays.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | DST1405 |
| Manufacturer | Emerson / Control Techniques (Nidec) |
| Product Type | Servo Drive / Servo Amplifier |
| Series | Digitax ST |
| Rated Input Voltage | 380–480 V AC, ±10%, 3-Phase |
| Input Frequency | 48–65 Hz |
| Nominal Output Current | 8.0 A RMS |
| Peak Output Current | 24.0 A RMS (300% overload) |
| Output Voltage | 0 to input voltage |
| Output Speed Range | 0–40,000 rpm |
| Control Modes | Position, Velocity, Torque |
| Speed Loop Bandwidth | 160 Hz |
| Current Loop Bandwidth | 1100 Hz |
| Speed Control Accuracy | 0.01% |
| Speed Resolution | 0.001 rpm |
| Carrier Frequency | 3 / 4 / 6 / 8 / 12 kHz (selectable, default 6 kHz) |
| Feedback Options | Incremental Encoder, Absolute Encoder, Sin/Cos, Analog Position, Resolver (option) |
| Encoder Response Frequency | 500 kHz |
| Serial Communication | 2-wire Modbus RTU, 115,200 bps |
| Safety Function | Safe Torque Off (STO) – SIL3 / PLe / Cat.3 |
| Braking Resistor Option | 70 Ω, 50 W average (2.2 kW peak @ 230 V, 8.7 kW peak @ 400 V) |
| Frame Size | Frame Size 1 |
| Protection Rating | IP20 (UL Type 1 / NEMA 1) |
| Dimensions (W × H × D) | 62 × 322 × 226 mm |
| Weight | 2.1 kg (excluding keypad and option modules) |
| Operating Temperature | 0 °C to 50 °C (derating above 40 °C) |
| Storage Temperature | -40 °C to 70 °C |
| Relative Humidity | Up to 95%, non-condensing |
| Max Altitude | 1000 m rated, 3000 m max (with derating) |
| Option Slots | 2通用 option slots (SM-series fieldbus & feedback modules) |
