Description
The Allen Bradley 1398-DDM-075 is a high-performance, compact digital servo drive from the ULTRA 100 series. It is designed to provide precise control for brushless servo motors in high-speed industrial automation and motion control applications.
Product Parameters (Datasheet)
- Model Number: 1398-DDM-075
- Series: ULTRA 100 Digital Servo Drive
- Input Voltage: 100–240V AC (Single-phase, 50/60 Hz)
- Continuous Output Current: 7.5 Amps (RMS)
- Peak Output Current: 15 Amps (RMS)
- Continuous Output Power: 1.25 kW (at 230V)
- Feedback Supported: High-resolution incremental encoders
- Communication Interface: RS-232 / RS-422 for commissioning and diagnostics
- Control Modes: Torque, Velocity, and Position (via Step/Direction or Analog Input)
- Enclosure Rating: IP20

Allen Bradley 1398-DDM-075

Allen Bradley 1398-DDM-075

Allen Bradley 1398-DDM-075
Country of Origin
The 1398-DDM-075 was engineered and manufactured by Rockwell Automation / Allen-Bradley in the USA.
Application Fields
This drive is widely utilized in precision-driven industrial sectors:
- Packaging Machinery: Coordinating high-speed indexing and labeling.
- Semiconductor Manufacturing: Precise positioning for wafer handling and assembly.
- Automated Assembly: Driving multi-axis robotic arms and pick-and-place stations.
- Textile Industry: Managing tension control and high-speed synchronized winding.
- CNC Tooling: Controlling feed axes for small-to-medium scale milling and engraving.
Product Usage Instructions
- Mounting: Install the drive vertically in a control cabinet. Maintain at least 50mm (2 inches) of clearance above and below the unit for proper airflow and cooling.
- Wiring Power: Connect the AC input (L1, L2/N) to a fused power source. Ensure the ground terminal is connected to the common system ground to minimize electrical noise.
- Motor Connection: Connect the three-phase motor leads to terminals U, V, and W. Use shielded cables to reduce EMI.
- Feedback Setup: Plug the encoder cable into the J2 feedback port. Ensure the cable is routed away from high-power AC lines to prevent signal interference.
- Commissioning: Use the ULTRA Master software via the serial port to configure motor parameters, tune PID loops, and set current limits.
Product Technical Description
Technically, the 1398-DDM-075 is a pulse-width modulated (PWM) digital drive. It utilizes advanced DSP (Digital Signal Processing) to execute high-speed current, velocity, and position loops. The “075” designation refers to its 7.5A continuous current capacity. One of its standout features is the ability to accept a wide range of input commands, including ±10V analog signals for velocity control and “Step and Direction” inputs, which allow it to be controlled like a stepper motor but with the superior performance and closed-loop reliability of a servo system.
Q&A (Common Questions)
Q: Can I use this drive with a third-party motor? A: Yes, provided the motor is a permanent magnet brushless AC servo motor and the encoder specifications are compatible with the ULTRA 100 feedback inputs.
Q: What does a “Seven-Segment Display” error code “E” mean? A: An “E” followed by a number usually indicates a hardware fault. For example, E2 typically refers to an overcurrent condition. Check the motor wiring for shorts.
Q: Is this drive compatible with the newer Kinetix systems? A: The ULTRA 100 is a legacy series. While it can often be integrated into newer systems via analog or pulse/direction interfaces, it does not support modern Ethernet/IP (CIP Motion) natively.
Q: Does it require an external 24V supply for logic? A: The 1398-DDM-075 generates its own internal logic power from the AC mains, though external 24V is often required for the I/O interface signals.
Similar Model Recommendations
- Allen Bradley 1398-DDM-005 (5A lower power version)
- Allen Bradley 1398-DDM-019 (15A/19A higher power version)
- Allen Bradley 1398-DDM-030 (30A high-capacity version)
- Allen Bradley 2098-DSD-010 (Kinetix 300 modern equivalent)
- Allen Bradley 1398-HMI-001 (Handheld terminal for ULTRA series)
For technical support or to request a quote for the Allen Bradley 1398-DDM-075, please contact our motion control team today.

