The Siemens 6ES7 972-4AA02-0XA0 is a SIMATIC DP Power Rail Booster that amplifies PROFIBUS DP signals transmitted via sliding contacts and non-standard electrical media. It extends communication range and signal integrity in mobile or flexible industrial networks operating under high electromagnetic interference. The device functions as a transparent signal transformer, supporting PROFIBUS DP/FMS, FDL, and MPI protocols across mono- and multi-master topologies.
Technical Specifications
Signal Transmission
• Maximum transmission speed: 500 kbit/s
• Protocol support: PROFIBUS DP/FMS, FDL, MPI
• Automatic baud rate detection on power-up
• Transparent message processing (syntax validation only)
• Supports mono- and multi-master systems
Electrical Performance
• Supply voltage: 24 V DC nominal (20.4 V DC to 28.8 V DC permissible range)
• Maximum input current: 1.2 A
• Maximum power loss: 20 W
• Two independent isolated interfaces
Physical & Connectivity
• Dimensions: 90 mm W × 132 mm H × 67.5 mm D
• Primary interface: 9-pin D-subminiature (female) socket, RS 485 bus per EN 50170
• Secondary interface: Terminal strip with signal pins A1, A2, B1, B2 (nominal 2.5 mm² cross-sectional area)
• Status and malfunction indication via LEDs
– Key Features
• EMC load tolerance with optional interference suppressor filters for enhanced performance
• Cascadeable configuration—up to 10 Power Rail Boosters supported in series
• Minimum two boosters required per transmission link
• Compatible with line and star network topologies
• Integrates into existing PROFIBUS fieldbus networks without modification
– Typical Applications
• Motor-driven overhead trolley conveyors
• Storage and retrieval systems
• Crane installations
– Compatibility & Integration
Designed for electrical PROFIBUS networks requiring extended transmission over sliding contacts, loops, and specialized cable types. Network configuration remains flexible post-installation.
