Bently Nevada 3701/55 ADAPT.ESD Emergency Shutdown System

Bently Nevada 3701/55 ADAPT.ESD Emergency Shutdown System

This triple-redundant emergency shutdown system handles critical protection tasks for rotating machinery in harsh industrial environments. Originally designed for turbine overspeed protection but widely adopted across compressors, pumps, and process equipment where safety shutdown reliability matters most.

Technical Specification	Details
Brand	Bently Nevada
Model	3701/55
Series	ADAPT.ESD
Voltage	220 V AC
Input Channels	6 Speed Inputs (2 groups), 32 Digital/Analog
Output Channels	Triple Redundant Relays (5 per module)
Certifications	SIL 3, ATEX, CSA, CE
Operating Temp	-30°C to +65°C

We see this system deployed primarily in oil & gas processing plants and power generation facilities where API 670 compliance is mandatory. The triple-modular redundancy architecture makes it ideal for applications requiring SIL 3 safety integrity levels—like emergency shutdowns for gas turbines or critical compressor trains. Our customers particularly appreciate the 2oo3 voting logic flexibility for balancing safety and availability.

While originally designed for vibration monitoring systems, we’ve successfully integrated these modules into complete emergency shutdown packages for:

• Gas turbine overspeed protection (3500 series systems)
• Centrifugal compressor anti-surge control
• Refinery process unit emergency isolation
• Offshore platform equipment shutdown

Our inventory includes related components like 3500/22M interface modules, 3500/42M relay packs, and 1900/27 proximity probes. We’ve recently helped clients upgrade legacy systems while maintaining compatibility with existing 3300 series installations.