ABB ARC093 AE01 (Order No.: HIEE300690R0001) is a 16‑channel relay output card designed specifically for the UNITROL 6000 series generator excitation control system, manufactured in Switzerland. As a key interface module between the control system and external high‑power electrical equipment, its core function is to convert weak logic signals from the control system into reliable relay contact outputs, accurately executing critical control commands such as generator tripping, fault alarm, status signal switching, and equipment interlocking. It is widely used in excitation control for thermal, hydro, nuclear and other types of generator sets, as well as high‑power industrial equipment control applications. Featuring a high‑density, high‑reliability design, the module provides full electrical isolation and intelligent diagnostic capabilities, enabling long‑term stable operation in harsh industrial environments and ensuring the safety and continuity of power generation and industrial control processes.

Basic Information

• Model Identification: AR C093 AE01, Order No.: HIEE300690R0001
• Product Type: 16‑Channel Relay Output Card
• Compatible System: ABB UNITROL® P Excitation System
• Country of Origin: Switzerland
• Quantity Per Set: 2 units standard for each UNITROL® P system
• Physical Dimensions: 180 mm (W) × 480 mm (D) × 80 mm (H)
• Net Weight: 0.76 kg

• Protection Class: IP20

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Functions & Technical Features

1. Output Channel Specifications

• Number of Channels: 16 independent SPDT (Single Pole Double Throw) relay outputs
• Contact Rating: 250V AC / 5A; 30V DC / 5A (resistive load)
• Electrical Isolation: Full electrical isolation between channels and between channels and system side, strong anti-interference capability
• Contact Type: Gold-plated contacts, low on-resistance, long service life and high reliability

2. Power Supply & Operating Environment

• Operating Power: 24V DC ±20%
• Operating Temperature: -20℃ ~ +60℃
• Storage Temperature: -40℃ ~ +85℃
• Vibration Resistance: Compliant with IEC 60068-2-6, 5–500Hz / 10g
• MTBF: >100,000 hours (based on Bellcore TR-332 at 40℃)

3. Intelligent Diagnosis & Protection

• Contact Weld Detection: Real-time monitoring of each relay contact status, immediate alarm for abnormalities
• Overcurrent / Overvoltage Protection: Built-in output loop protection circuit to prevent module damage from external faults
• Communication Abnormality Alarm: Triggers status indication when communication with main controller is interrupted
• Status Indication: Front-panel LED indicators for clear power, running and fault status display

4. System Compatibility

• Compatible System: Dedicated for ABB UNITROL 6000 series excitation controllers
• Communication Interface: Built-in system bus interface for seamless communication with UNITROL 6000 controllers
• Installation: Standard rack mounting, hot-swappable supported (in selected system configurations)
• Application Adaptation: Perfectly matched for generator AVR tripping circuits, synchronous grid-connection signals, fault alarms and equipment interlock control

Application Scenarios

Generator Excitation System

• Generator emergency trip loop control
• Excitation system fault alarm signal output
• Synchronization / grid-connection status signal switching and indication
• Execution of protection actions such as over-excitation, under-excitation and over-current

Power Industry Control

• Interlock control for high-voltage switchgear in substations
• Start-stop and protection control for high-power industrial motors
• External high-voltage equipment drive interface for DCS systems
• Safety control for power plant auxiliary systems (water pumps, fans)

Frequently Asked Questions (FAQ)

• Solid red fault LED on the panel: hardware failure or communication abnormality
• Inoperative single channel: check contact weld alarm, wiring and external load for the corresponding channel
• All outputs inactive: first verify 24V DC power supply, bus connection and system configuration
• Detailed fault codes can be viewed via the diagnostic interface of the UNITROL 6000 controller