Modbus TCP device server Anybus ABC3028-A

RS-232serialModbus RTU

Overview
The Anybus Communicator ABC3028-A (40-SER-ETH-B) is a serial-to-Ethernet gateway that connects RS-232/RS-485 devices to Modbus TCP control systems. It enables reliable, low-latency data exchange between serial equipment and Modbus TCP controllers while supporting industrial mounting and standard security features.

Key features and benefits

• Easily convert proprietary RS-232/485 protocols: Drag-and-drop frame builder for Request/Response and Produce/Consume transactions; insert/extract fields and handle variable-length frames.
• Connect up to 32 Modbus RTU servers (slaves): Support for multiple slave servers, up to 150 Modbus commands, selectable 3 ms serial update rate, graphical transaction builder and PLC/controller triggers.
• High data capacity and throughput: Up to 1500 bytes per direction (3000 bytes total) to/from Modbus TCP controller; dual 10/100 Mbit full-duplex RJ45 ports with integrated switch; Modbus TCP server supports 4 connections.
• Near-instant transfers: Low processing latency aligned with network jitter for fast inter-network communication.
• Web-based configuration and diagnostics: Responsive graphical web UI accessed via dedicated Ethernet config port; live lists, serial traffic analysis and data exchange monitoring.
• Backward compatibility: Legacy mode to import configurations from Communicator Classic for drop-in replacement.
• Security and segmentation: Secure boot, physical configuration lock, role-based access control and design enabling network segmentation so only configured data crosses boundaries.
• Industrial design: Slim DIN-rail form factor, front-facing ports, industrial-grade components and 5-year warranty.
• Standards & CRA readiness: Developed under IEC 62443-4-1 certified process; supports HTTPS and role-based access to assist Cyber Resilience Act compliance.

Video
Product page includes a demonstration video showing the Anybus web user interface and typical configuration workflows.

Related software

• User Interface: Graphical web GUI available on second‑generation gateways to simplify configuration and enable trial evaluation.

Technical specifications

• Item number: ABC3028-A
• Brand: Anybus
• Model code: 40-SER-ETH-B
• Mounting: DIN-rail (EN 50022)
• Dimensions (W×H×D): 27 × 144 × 98 mm
• Net weight: 150 g (185 g packed)
• Input voltage: 12–30 V DC
• Typical current: 90 mA @ 24 V DC (2.2 W); Max 125 mA @ 24 V DC (3 W)
• Connectors: 1×7-pin 5.08 mm Phoenix plug, 2×RJ45 (data), RJ45 config port
• Serial: RS-232, RS-485; Modbus RTU Master; baudrates up to 128000 bit/s; input/output data size 1500 bytes
• Modbus TCP: Mode Slave/Server; supports Modbus spec V1.1b3; 4 connections; 10/100 Mbit/s
• Operating temperature: -25 °C to 70 °C; Storage: -40 °C to 85 °C
• Ingress protection: IP20
• Certifications: CE, UL, KC, WEEE, EMC; UL information E214107
• Warranty: 5 years