ABB HESG324389 REX010
ABB HESG324389 REX010
ABB HESG324389 REX010
ABB HESG324389 REX010
ABB HESG324389 REX010

ABB HESG324389 REX010 | S800 I/O Series Fieldbus Gateway Module

  • Brand: ABB
  • Model: HESG324389 REX010
  • Product Type: Communication Interface Module
  • Series: S800 I/O / Advant Open Control
  • Core Function: Facilitates fieldbus communication (Profibus DP, Modbus RTU) between ABB controllers and distributed I/O/sensors.
  • Key Specs: 24V DC power supply; supports 2x Profibus DP ports; -25°C to +70°C operating temperature.
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Part number: ABB HESG324389 REX010
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Description

HESG324389 REX010: Product Overview
This communication interface module is designed for integration into ABB’s S800 I/O system and Advant Open Control distributed control system (DCS) architectures, serving as a critical link between central controllers (e.g., AC 800M) and field-level devices (sensors, actuators, remote I/O stations). Its role is to enable reliable data exchange over industrial fieldbus networks, ensuring seamless integration of distributed assets into the control hierarchy.
The core functionality involves protocol conversion and signal routing. It handles Profibus DP (up to 12 Mbps) and Modbus RTU (RS-485) protocols, translating controller commands into fieldbus-compatible messages and vice versa. The module acquires digital/analog signals from remote I/O, executes basic data validation, and transmits processed information to the controller, while also forwarding control outputs to final elements. As part of the S800 I/O family, it benefits from ABB’s modular platform, which prioritizes scalability (supporting up to 64 nodes per segment), interoperability with legacy Advant systems, and compliance with IEC 61158 fieldbus standards. This platform advantage reduces integration complexity in brownfield projects and streamlines expansion in greenfield installations.

ABB HESG324389 REX010

ABB HESG324389 REX010

HESG324389 REX010: Technical Specifications
  • Model Number: HESG324389 REX010
  • Manufacturer: ABB
  • Product Type: Communication Interface Module
  • Series: S800 I/O / Advant Open Control
  • Power Supply: 24 VDC (19.2–31.2 VDC range)
  • Protocol Support: Profibus DP (v1/v2), Modbus RTU (RS-485)
  • Number of Ports: 2x Profibus DP (DB9 connector), 1x RS-485 (terminal block)
  • Data Transfer Rate: Profibus DP up to 12 Mbps; Modbus RTU up to 38.4 kbps
  • Operating Temperature: -25°C to +70°C
  • Storage Temperature: -40°C to +85°C
  • Dimensions (HxWxD): 119 x 45 x 135 mm
  • Weight: 0.4 kg (approx.)
  • Mounting: DIN rail (35mm)
  • Certifications: CE, UL, cUL, RoHS
Core Features & Customer Value​
Multi-protocol fieldbus support: The module natively handles Profibus DP and Modbus RTU, eliminating the need for external protocol converters. For engineers, this simplifies cabinet wiring and reduces component count—for example, in a water treatment plant, it can connect a Modbus RTU-based sensor array to an ABB DCS without additional gateways, cutting installation time by 30%.
Rugged industrial packaging: With a -25°C to +70°C operating range and DIN rail mounting, the module withstands harsh environments (e.g., chemical plants, outdoor substations). Its compact size (119x45x135mm) minimizes cabinet space, a key consideration in retrofit projects with limited real estate.
Seamless S800 I/O integration: As part of the S800 family, the module auto-configures with ABB’s Asset Management software, allowing engineers to map I/O points via drag-and-drop. This reduces programming effort compared to third-party interfaces, accelerating system commissioning.
Basic data validation: The module checks for signal integrity (e.g., CRC errors in Modbus RTU frames) before transmitting data to the controller. For the customer, this reduces false alarms and ensures only valid process data reaches the control logic, improving decision-making accuracy.
Hot-swappable design: When installed in a properly configured S800 carrier, the module supports hot swapping, allowing replacement without shutting down the system. This minimizes downtime during maintenance, critical in continuous-process industries like oil refining.

ABB HESG324389 REX010

ABB HESG324389 REX010

Typical Applications​
The module is deployed in scenarios requiring fieldbus connectivity for distributed I/O. In an automotive assembly plant, it links ABB AC 800M controllers to Profibus DP-based robot I/O modules, enabling real-time synchronization of welding robots with conveyor systems. The dual-port design allows daisy-chaining multiple robot stations on a single segment.
In a municipal wastewater treatment facility, it connects Modbus RTU sensors (pH, turbidity) to a central SCADA system via an S800 I/O rack. The module’s data validation filters out noise from variable speed pumps, ensuring accurate chemical dosing control.
Another application is in a cement plant’s kiln control system, where it interfaces Profibus DP temperature transmitters with the DCS. The wide temperature range (-25°C to +70°C) suits the hot, dusty environment near the kiln, while redundancy (when paired with a second module) ensures continuous monitoring.

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