Bently Nevada 1701/90 141380-01 Dual Galvanic Isolator Module

Configured for intrinsic safety implementation in FieldMonitor architectures, the Bently Nevada 1701/90 141380-01 (1701/90 Dual Galvanic Isolator) provides direct physical execution of signal isolation for transducers located in hazardous zones.

Suffix Breakdown & Model Matrix

Hardware Specifications

Mechanical Monitoring and TSI Integration

The 1701/90 module provides galvanic isolation for hazardous area instrumentation, specifically designed to support eddy-current probe scaling and velocity transducer inputs without external zener barriers. By eliminating the requirement for an intrinsically safe ground, the module simplifies field wiring for TSI systems. To ensure accurate rotor dynamics analysis, the module maintains signal path impedance, minimizing the risk of signal distortion. Effective cross-talk suppression is achieved through high-isolation internal transformers, ensuring that independent channels remain electrically decoupled even when subjected to potential common-mode noise from field sensor faults or transient surges.

Frequently Asked Questions

Q: Does the 1701/90 module require external safety barriers for Zone 0 installations?

A: No. The 1701/90 is designed to provide intrinsic safety protection directly within the FieldMonitor assembly, removing the requirement to specify and install supplemental external safety barriers for hazardous area applications.

Q: Is this module compatible with all Bently Nevada Proximitor sensors?

A: The 1701/90-01 is compatible with 170133 and 170172 internal dual sensors, as well as standard external Proximitor sensors, accelerometers, and velocity transducers. For specialized velocity transducers like the CEC 4-131, the 1701/90-02 variant is required.

Field Installation Guidelines

1. Integration: The module must be inserted into an appropriate FieldMonitor Isolator Terminal Base (ITB). Ensure the mechanical retention clips are fully engaged to provide a secure electrical connection to the terminal base.
2. Zone Separation: Ensure that field wiring originating from the hazardous area (Zone 0/1) is physically separated from non-hazardous signal cabling at the terminal block to maintain the integrity of the intrinsic safety barrier.
3. Shielding: While the module provides galvanic isolation, utilize shielded twisted-pair cabling for all transducer inputs to provide additional protection against electromagnetic interference.
4. Maintenance: Regularly inspect the module connection points for signs of environmental corrosion. In hazardous installations, adhere to site-specific lockout/tagout procedures before module removal or inspection.