Emerson Control Techniques DST1403

The Emerson Control Techniques DST1403 is a high-performance Servo Drive from the Digitax ST series. This specific model is designed for high-dynamic applications that require precise motor control, such as labeling machines, high-speed packaging, and CNC feeders.

The “1403” designation identifies the drive’s voltage class and current rating.

1. Catalog Number Breakdown: DST1403

• DST: Digitax ST Series (optimized for pulse-train or synchronized motion).

   

• 1: 400V Voltage Class.

• 4: Operating voltage (380V – 480V AC).

   

• 03: Current rating. This model typically provides 3.0 Amps of continuous current and 9.0 Amps of peak current.

2. Technical Specifications

3. Integrated Intelligence

The Digitax ST is more than a simple motor driver; it is often used as a standalone motion controller thanks to its on-board PLC functionality.

• SmartCard Slot: Located on the front, this allows you to save and clone parameters or PLC programs without a computer.

• Expansion Slots: The drive features two “Solutions Module” (SM) slots on the top. You can add cards for EtherCAT (SM-EtherCAT), Profinet (SM-Profinet), or specialized I/O.

• High-Speed I/O: Includes dedicated high-speed freeze inputs for capturing positions with microsecond accuracy.

4. Wiring and Hardware Setup

The DST1403 utilizes a compact “bookshelf” design to save space in the control cabinet.

• Power Connections (Bottom): $L1, L2, L3$ for mains and $U, V, W$ for motor output.

• DC Bus: Terminals for connecting an external braking resistor. Because this is a high-dynamic drive, a braking resistor is almost always required for rapid deceleration.

• Communication: Built-in RS485 (RJ45 port) for commissioning via PC.

5. Common Status & Fault Codes

The drive features a status LED and a 2-digit display. If a fault occurs, it will trip and display a code:

• It.AC: Over-current. Check for a short circuit or mechanical binding in the motor.

• OU: DC Bus Over-voltage. The motor is regenerating too much energy; check the braking resistor.

• th: Motor Thermistor trip. The motor is overheating.

• Enc1: Encoder feedback fault. Check the cable shielding and the connector on the back of the motor.

6. Software & Commissioning

To program the DST1403, you typically use CTSoft (for parameter configuration) or SyPTLite (for the on-board PLC logic).

Note: Modern systems may use Connect (the successor to CTSoft) depending on the firmware version of your drive.