ABB 1KHL178025R0102P COM02 Communication Circuit Board for DCS Systems

Product Overview

The ABB 1KHL178025R0102P COM02 is a high-performance communication interface circuit board engineered by ABB for seamless integration into distributed control systems (DCS) and programmable logic controller (PLC) platforms. As a versatile serial communication module, the ABB 1KHL178025R0102P COM02 serves as a critical bridge between ABB’s flagship control systems—including System 800xA, Advant OCS, and AC 800M controllers—and a wide array of intelligent field devices . The ABB 1KHL178025R0102P COM02 enables reliable data exchange with third-party instruments such as variable frequency drives, weighing systems, barcode readers, and legacy Modbus devices, making it an indispensable component for system integration and modernization projects.

The ABB 1KHL178025R0102P COM02 distinguishes itself through its multi-standard electrical interface support, allowing a single configurable port to operate as RS-232, RS-422, or RS-485, with baud rates up to 115.2 kbps . The module’s robust optical isolation—providing up to 1500V AC galvanic isolation between the serial port and the system backplane—protects sensitive controller electronics from ground loops, voltage transients, and surge events common in industrial environments . Designed for 24/7 operation in harsh conditions, the ABB 1KHL178025R0102P COM02 delivers exceptional reliability with MTBF ratings exceeding 250,000 hours and SIL2 certification, ensuring dependable performance in safety-critical applications .

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Description

Technical Specifications

Parameter Name	Value
Product Model	1KHL178025R0102P COM02
Manufacturer	ABB Ltd.
Product Type	Communication Interface Circuit Board / Serial COM Port Expansion Module
Compatible Systems	ABB System 800xA, Advant OCS, AC 800M, AC31 Series
Serial Ports	1 × Configurable RS-232 / RS-422 / RS-485 (DB-9 or screw terminals)
Supported Protocols	Modbus RTU / ASCII (Master or Slave), PROFIBUS DP-V1, ABB CS31, HART Pass-Through
Baud Rate	300 bps – 115.2 kbps
Isolation Voltage	500V – 1500V AC (galvanic isolation between port and backplane)
Power Supply	24V DC ±10% (or 5V DC via backplane)
Operating Temperature	-40°C to +70°C
Storage Temperature	-40°C to +85°C
Dimensions	Approx. 120mm × 45mm × 110mm to 180mm × 150mm × 10mm (variant dependent)
Weight	Approx. 0.2 – 0.7 kg
Certifications	SIL2, ATEX Zone 2, IECEx, CE, UL Class I Div 2
MTBF	>250,000 Hours

Main Features and Advantages

Multi-Standard Serial Interface with Advanced Protocol Support

The ABB 1KHL178025R0102P COM02 provides exceptional versatility through its configurable serial port, supporting RS-232 for point-to-point connections up to 15 meters, RS-422 for full-duplex differential communication up to 1200 meters, and RS-485 for multi-drop networks with up to 32 nodes per segment . The module natively handles Modbus RTU framing with hardware-assisted CRC generation, ABB CS31 token-passing protocol, and free-form ASCII communication, enabling seamless integration with virtually any serial device .

Integrated Backplane Architecture for Deterministic Performance

Unlike external USB-to-serial converters, the ABB 1KHL178025R0102P COM02 connects directly to the controller CPU via the internal system bus. Serial interrupt handling and buffer management are offloaded to dedicated hardware, ensuring deterministic message parsing without impacting the PLC/DCS scan cycle . This architecture makes the ABB 1KHL178025R0102P COM02 ideal for time-critical applications where communication latency must be minimized.