Description
Siemens 6ES7157-0AC85-0XA0 – FDC 157 PROFIBUS DP/PA Field Device Coupler
Product Overview
The 6ES7157-0AC85-0XA0 is a professional FDC 157 field device coupler engineered by Siemens for process automation bus conversion and field device integration. Serving as a critical physical interface module, it enables seamless data transmission between PROFIBUS DP control systems and field-level PROFIBUS PA as well as Foundation Fieldbus H1 instruments. The 6ES7157-0AC85-0XA0 integrates a built-in 1 A bus power supply, electrical isolation design, and comprehensive diagnostic functions, effectively solving bus communication mismatch and unstable power supply issues in distributed process control systems. It delivers continuous, reliable bus operation for instrumentation in harsh industrial process environments.
Technical Specifications
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Brand: Siemens
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Model:6ES7157-0AC85-0XA0
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Warranty: One Year
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Condition: 100% New & Original
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Product Type: FDC 157 Field Device Coupler
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Supply Voltage: 24V DC industrial power supply
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Max Power Supply Output: 1000 mA (1 A) for field bus devices
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Connectable Devices: Supports up to 31 PROFIBUS PA field instruments
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Communication Protocols: PROFIBUS DP, PROFIBUS PA, Foundation Fieldbus H1
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Transmission Rate: 45.45 kbit/s (DP); 31.25 kbit/s (PA / H1)
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Electrical Isolation: 600 V DC reinforced isolation between interfaces and power circuits
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Redundancy Support: Compatible with redundant bus operation for enhanced system reliability
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Diagnostic Features: Integrated group error indicator and full bus status diagnosis
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Power Failure Buffering: 5 ms data retention buffer
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Protection Grade: IP20
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Operating Temperature: -25°C to +60°C (extended industrial range)
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Storage Temperature: -40°C to +70°C
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Dimensions (W×H×D): 80 mm × 125 mm × 130 mm
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Certifications: CE, UKCA, EAC industrial safety certifications
Application Scenarios
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Chemical & Petrochemical Process Control: The6ES7157-0AC85-0XA0 acts as the core bus conversion module for process automation systems, connecting DP-based PLC controllers with PA/H1 field transmitters, control valves and flow meters. Its isolated circuit design prevents signal interference in explosive and high-corrosion industrial environments.
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Oil & Gas Pipeline Monitoring Systems: Widely deployed in oilfield and natural gas pipeline automation. Redundant bus compatibility and professional diagnostic functions minimize communication failure risks, ensuring stable data collection and remote control for long-distance pipeline monitoring equipment.
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Water Treatment & Pharmaceutical Automation: Applied in municipal water purification, sewage treatment and pharmaceutical production lines. The integrated bus power supply simplifies on-site wiring, while wide-temperature operation adapts to diverse cabinet environments, supporting stable operation of distributed process instrumentation.
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