1 Year Warranty
Description
Product Overview
126623-01 is the Aero GT Vibration I/O Interface Module developed by Bently Nevada for the 3500/44M aeroderivative gas turbine monitor within the industry-renowned 3500 machinery protection rack system. This card acts as the dedicated signal conditioning front-end, receiving raw input from proximity probes, seismic accelerometers and velocity transducers mounted on high-speed gas turbine rotors. It converts weak sensor signals into conditioned, high-fidelity measurement data for the 3500/44M monitor to compute vibration amplitude, rotor position and dynamic waveform metrics.
Many aeroderivative turbine monitoring projects face signal degradation issues caused by long sensor cable runs, high electrical noise in turbine enclosures and limited slot space in existing 3500 racks. 126623-01 mitigates these risks by performing local signal conditioning and fault detection directly on the module, identifying open cables, short circuits and transducer faults before corrupted data enters the monitor core. The card’s external termination design simplifies field wiring and troubleshooting, and it integrates seamlessly with the 3500 rack configuration software for channel setup, alarm threshold programming and transient waveform capture for post-fault machinery diagnostics.
Technical Specifications
| Parameter name | Parameter value |
|---|---|
| Product model | 126623-01 |
| Manufacturer | Bently Nevada |
| Product type | Aero GT Vibration I/O Interface Module |
| Compatible monitor | 3500/44M Aeroderivative Gas Turbine Monitor |
| Input transducer types | Proximity probes, accelerometers, velocity transducers |
| Power supply | 24 V DC ±10% |
| Typical power consumption | <5 W |
| Number of signal channels | 4 conditioned measurement channels |
| Operating temperature | -40°C ~ +85°C |
| Mounting | Plug-in slot for Bently Nevada 3500 rack |
| Dimensions (H×W×D) | 241.3 mm × 24.4 mm × 99.1 mm |
| Weight | 450 g |
| Certifications | CE, API 670 compliant |
Key Features and Advantages
transducer signal conditioning: 126623-01 handles raw sensor signal amplification and filtering for turbine vibration and position inputs. It suppresses high-frequency electrical interference present in gas turbine enclosures, preserving waveform integrity for high-speed rotating machinery analysis. built-in transducer health diagnostics: Each channel continuously checks for probe cable breaks, short circuits and transducer bias voltage drift. Fault flags are sent to the 3500 system, allowing operators to locate degraded sensor circuits remotely before machinery damage occurs. purpose-built for aeroderivative turbines: Optimised for the dynamic response characteristics of high-cycle gas turbine rotors. It maintains stable sampling during rapid load transients and rotor speed fluctuations common in peaking power generation assets. external termination architecture: Field sensor wiring connects to dedicated external terminal assemblies instead of soldered or hardwired rack connections. This reduces rack disassembly time during sensor replacement or wiring modification. native 3500 ecosystem integration: Configuration is completed using Bently Nevada 3500 Rack Configuration Software. Channel scaling, alarm setpoints and transient capture parameters download together with the 3500/44M monitor, eliminating third-party configuration tools.
126623-01
Application Fields
126623-01 is deployed exclusively in 3500 rack machinery protection systems for aeroderivative gas turbines used in power generation, offshore oil & gas and industrial combined-cycle plants. In peaking power stations, it interfaces with rotor vibration and position sensors on aeroderivative gas turbines, feeding conditioned signals to the 3500/44M monitor for continuous machinery protection and alarming.
For offshore gas platforms and remote onshore compressor stations, the module monitors high-speed turbine-driven compressors, detecting excessive vibration and rotor displacement that may lead to blade or bearing failure. It captures high-resolution transient waveform data for root-cause analysis after trip events, supporting asset health audits and maintenance planning.
It is also widely used in industrial captive power plants and mechanical drive systems for refinery processes. 126623-01 delivers reliable transducer signal conditioning in high-temperature, high-vibration turbine house environments. It works with the 3500 rack to generate machinery alarm and trip logic, protecting critical rotating assets while transmitting vibration health data to plant SCADA and asset management platforms.
Related Products
- 3500/44M: Aeroderivative gas turbine monitor, primary paired hardware with 126623-01
- 3500/05: 3500 series rack chassis, mechanical carrier for all 3500 plug-in modules
- 3500/15: 3500 system power supply module, supplies rack power for 126623-01
- 3500/22M: Transient data interface module, retrieves waveform records from the 3500/44M monitor
- 330103: 3300 series proximity probe, compatible transducer for rotor position measurement
- 330130: Probe extension cable, used with proximity probes connected to 126623-01
- 126622-01: Earlier generation Aero GT I/O module, predecessor for retrofit replacement
- 3500/42M: General-purpose vibration monitor, alternative for non-aeroderivative rotating machinery
Installation and Maintenance
pre-installation preparation: Before inserting 126623-01 into the 3500 rack, confirm the rack backplane and 3500/44M monitor are correctly installed and powered off. Verify 24 V DC rack supply voltage stays within rated tolerance. Route transducer cables separately from high-voltage power wiring to minimise EMI. Complete channel assignment, transducer type selection and alarm threshold setup inside 3500 configuration software before applying power to sensors. Inspect external termination terminals for corrosion or loose screw connections.
maintenance recommendations: During routine machinery protection system inspections, review channel diagnostic status in the 3500 software to identify gradual transducer or wiring degradation. Avoid hot removal of 126623-01 while the rack remains energised, as this will interrupt turbine protection logic. If persistent signal noise appears, inspect probe cables, shielding and grounding before replacing the module. 126623-01 contains no field-serviceable internal components; return faulty units to authorised Bently Nevada service centres for repair.
Product Warranty & Support
Each 126623-01 undergoes factory signal testing, channel validation and compatibility verification with the 3500/44M monitor before shipment. The standard factory warranty covers manufacturing defects for 12 months after delivery. Spare part sourcing, firmware revision updates and remote technical support are available for rack configuration, FAT and site SAT testing. Application engineers provide guidance for transducer matching, wiring shielding and vibration alarm tuning. Long-term spare inventory reduces obsolescence risks for installed 3500 machinery protection racks protecting aeroderivative gas turbines.
