WATLOW AH116-2 Servo Drive / Control Module

Introduction to ALSTOM AH116-2

The ALSTOM AH116-2 is a high-performance servo drive/control module primarily used in industrial automation and precision motion control.

Developed as part of Alstom’s advanced control platforms (and often categorized under the 800 Series), this module acts as a critical interface for governing the movement of servo motors or high-precision actuators.

Unlike standard power switches, the AH116-2 is a "smart" unit, capable of processing real-time feedback to ensure that industrial machinery moves with sub-millimeter accuracy.

It is widely recognized for its reliability in both heavy industrial manufacturing and complex rail signaling systems.

Technical Parameter Table

Related Models & Same Series

The AH-series belongs to Alstom’s modular control architecture, frequently paired with the following:

AH116-1: The predecessor or base-tier version with fewer I/O interfaces.

AH120 / AH124: High-capacity variants for larger motor control applications.

AL129A / AL132: Programmable controller modules often used in the same SCADA or DCS network.

MVAX / MVAJ Series: Protection relays that work alongside the AH116-2 in power-sensitive environments.

Product Advantages and Features

Precision Motion Control: Provides closed-loop feedback processing, allowing for extremely smooth acceleration and deceleration curves.

High-Speed Processing: Equipped with an internal CPU and RAM to handle real-time data acquisition and complex logic execution without lag.

Ruggedized Design: Built for "harsh environment" industrial standards, with high resistance to electromagnetic interference (EMI) and vibration.

Communication Versatility: Supports multiple industrial protocols (Modbus, CAN-BUS), enabling seamless integration into ABB, Siemens, or Honeywell DCS systems.

Hot-Swappable Capability: Depending on the rack configuration, it supports maintenance without a full system shutdown.

Application Cases

Industrial Robotics: Controlling the multi-axis movement of robotic arms in automotive assembly lines.

Rail Transit Signaling: Used in trackside control cabinets to manage the precise movement of switch machines (point machines).

CNC Machining: Driving high-speed spindles and feed motors in precision metalworking.

Energy Management: Managing the positioning of solar trackers or wind turbine blade pitch controls.

Installation and Maintenance

nstallation

Rack Integration: Ensure the module is firmly seated in the 800-series chassis. Use the thumbscrews to secure the module against vibration.

Wiring: Use shielded twisted-pair cables for communication (RS-485/CAN) to prevent signal noise from interfering with motor accuracy.

Cooling: Ensure the cabinet has active ventilation, as the high-speed CPU generates heat during intensive switching cycles.

Maintenance

Firmware Updates: Regularly check for firmware patches from GE/Alstom to ensure compatibility with newer SCADA versions.

Connector Integrity: Inspect the gold-plated rear pins for oxidation or dust every 12 months.

Diagnostic LEDs: Monitor the status LEDs. A steady "Ready" light indicates healthy operation, while pulsing amber usually indicates a communication timeout.

Unique Product Description

The ALSTOM AH116-2 is essentially the "central nervous system" of a servo-driven machine. While power cables provide the "muscle," the AH116-2 provides the intent.

 It is unique because it bridges the gap between high-level software commands and raw mechanical force.

 In mission-critical environments like high-speed rail or automated factories, the AH116-2 ensures that every movement is not just powerful, but perfectly timed—preventing mechanical wear and maximizing system efficiency.