Siemens RS485 Repeater for connection of profibus/MPI bus Part number 6ES7972-0AA02-0XA0

Product Overview

Siemens SIMATIC DP RS-485 repeater (6ES7972-0AA02-0XA0) is a communications interface module designed for PROFIBUS and MPI fieldbus systems. It amplifies and regenerates RS-485 signals between bus segments, allowing reliable data transfer over extended distances and supporting up to 31 nodes on a network. With configurable segment separation and diagnostics, this repeater enhances bus stability and ease of troubleshooting in industrial automation networks.

Key Features

• RS-485 repeater for PROFIBUS and MPI bus systems
• Supports up to 31 devices per network segment
• Automatic or manual segment separation
• Baud rate support from low speeds up to 12 Mbit/s
• Terminators and switches for bus configuration
• Compact module for control cabinet installation
• Improved diagnostics for network troubleshooting

Technical Specifications

• Article Number: 6ES7972-0AA02-0XA0
• Product Type: SIMATIC DP RS-485 repeater
• Bus Systems Supported: PROFIBUS DP and MPI
• Maximum Nodes per Segment: 31
• Transmission Rates: 9.6 kbit/s up to 12 Mbit/s
• Supply Voltage: 24 V DC (typical industrial range)
• Protection Rating: IP20
• Dimensions (approx.): 45 mm × 128 mm × 59.3 mm
• Weight (approx.): 350 g
• Mounting: DIN rail or panel mount as appropriate
• Operating Temperature: Standard industrial range

Compliance & Certifications

• CE conformity according to applicable automation directives
• Designed and manufactured to Siemens industrial quality standards
• RoHS compliant for restricted hazardous substances
• Suitable for industrial communications networks

Applications

This RS-485 repeater is used in industrial automation networks to extend PROFIBUS and MPI bus segments, improve signal quality, and support larger distributed systems. It is ideal for factory floors, production lines, process automation, machine cabinets and control systems where long cable lengths or numerous nodes require signal regeneration and reliable communications.