June 08, 2026

CNV-TDR-60A Reliance Electric DDS‑TLII Series AC Servo Converter

The CNV‑TDR‑60A is a high‑performance, heavy‑duty AC‑to‑DC servo converter designed and manufactured by Reliance Electric (now part of Rockwell Automation) as a key component of the DDS‑TLII servo drive system. Engineered for industrial motion control applications requiring high power, stability, and reliability, it converts three‑phase AC input into a regulated DC bus supply for servo inverters, ensuring consistent and efficient operation under continuous and peak load conditions.

Description

CNV-TDR-60A Reliance Electric DDS‑TLII Series AC Servo Converter

Overview

The CNV‑TDR‑60A functions as the power supply unit within the DDS‑TLII servo system, delivering a controlled DC voltage to drive servo motors in high‑torque, high‑inertia applications. Built with robust power electronics and a heavy‑duty metal enclosure, it is optimized for panel mounting in industrial control cabinets and features forced‑air cooling to maintain stable thermal performance during prolonged operation. The unit integrates comprehensive protection circuits and status monitoring, making it suitable for use in demanding environments such as machine tools, material handling, and heavy automation systems.

Key Specifications

Manufacturer: Reliance Electric (Rockwell Automation)
Model: CNV‑TDR‑60A (DDS‑TLII Series)
Rated Power: 11 kW
Continuous Output Current: 60 A
Input Voltage: Three‑phase AC, 200–240 VAC ±10%, 50/60 Hz
DC Bus Output: Regulated DC voltage for servo inverter supply
Cooling Method: Forced air cooling with integrated fan
Protection Features: Overvoltage, undervoltage, overcurrent, overtemperature, short‑circuit, ground fault, and dynamic braking protection
Status Indicators: LED indicators for power, run, fault, and braking status
Braking Transistor: Internal wear‑less transistor switch for dynamic braking control
Operating Temperature: 0°C to +45°C (ambient, full rating)
Storage Temperature: -25°C to +70°C
Enclosure: Heavy‑duty metal casing, industrial IP20 rating
Dimensions (W × H × D): Approximately 305 mm × 457 mm × 203 mm
Weight: Approximately 10.9 kg
Compatibility: Matches DDS‑TLII servo drive inverters for high‑power motor control

Core Features

High‑Power Conversion: Delivers 60 A continuous current and 11 kW rated power, supporting high‑torque servo motors in heavy‑duty industrial applications.
Regulated DC Bus: Provides stable, ripple‑controlled DC output to servo inverters, ensuring smooth motion and precise speed regulation under varying load conditions.
Integrated Dynamic Braking: Built‑in braking transistor with status monitoring enables efficient energy dissipation during deceleration, reducing mechanical wear and improving cycle efficiency.
Comprehensive Protection Suite: Multi‑layer electrical and thermal protection safeguards the converter, inverter, and motor from faults, minimizing unplanned downtime and maintenance costs.
Robust Industrial Design: Heavy‑duty metal construction and efficient forced‑air cooling ensure reliability in harsh industrial environments, including exposure to vibration, dust, and temperature fluctuations.
Simple Integration and Monitoring: Clear LED status indicators and standardized wiring terminals simplify installation, commissioning, and on‑site diagnostics for maintenance personnel.
System Compatibility: Designed as a dedicated power supply for the DDS‑TLII servo drive series, ensuring seamless interoperability and optimized performance within Reliance Electric motion control systems.

Applications

The CNV‑TDR‑60A is engineered for high‑power, precision‑critical industrial motion control tasks:

Medium to large CNC machine tools and machining centers
Heavy‑duty material handling and conveyor systems
Industrial robotics with medium‑to‑high payloads
Metal forming, stamping, and pressing equipment
Packaging machinery with high‑inertia loads
General industrial automation requiring robust multi‑axis servo control

Lifecycle and Availability

The CNV‑TDR‑60A is a mature, widely supported component of the Reliance Electric DDS‑TLII servo platform. While some units may be available as new surplus or refurbished stock, it is backed by Rockwell Automation’s global technical support and authorized service networks, ensuring access to replacement parts, repair services, and application assistance for industrial automation deployments.

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