Bently Nevada 170190-01 Dual Galvanic Isolator

Description

Key Technical Specifications

Product Introduction

The Bently Nevada 170190-01 is a dual-channel galvanic isolator designed for the FieldMonitor™ Machinery Protection System. It provides an intrinsically safe interface between machinery protection electronics installed in a safe area and transducers located in hazardous environments.

Unlike conventional zener barrier solutions, the 170190-01 integrates galvanic isolation directly into the FieldMonitor architecture. This reduces field wiring complexity, eliminates the requirement for a dedicated intrinsically safe ground, and simplifies installation while maintaining signal integrity for vibration and position measurements.

170190-01

170190-01

Installation & Configuration Guide

Stage 1 – Pre-Installation Preparation (10 minutes)

⚠️ Safety First

1. Notify plant operations before shutdown.
2. Perform Lockout/Tagout (LOTO).
3. Verify the installation area classification.
4. Wear an ESD wrist strap before handling electronics.

Required Tools

• Digital multimeter
• ESD wrist strap
• Torque screwdriver
• Wire markers
• Camera for wiring documentation

Before removal:

• Record FieldMonitor configuration.
• Photograph all terminal wiring.
• Verify the replacement module is 170190-01, not 170190-02.

Stage 2 – Remove Existing Module (5 minutes)

1. Remove system power.
2. Disconnect field wiring after labeling each terminal.
3. Release the module from the Isolator Terminal Base (ITB).
4. Inspect connectors and terminals for corrosion or damage.

⚠️ Keep the existing module until the replacement has passed functional testing.

Stage 3 – Install the New Module (10 minutes)

1. Confirm part number 170190-01.
2. Insert the module completely into the ITB.
3. Tighten field wiring to the specified torque.
4. Verify hazardous-area earth and instrument earth connections.

Installation Checklist

• ✔ Correct module installed
• ✔ Wiring verified
• ✔ Earth connections confirmed
• ✔ Module fully seated

Stage 4 – Commissioning & Functional Test (15 minutes)

1. Restore system power.
2. Verify normal module indication.
3. Confirm communication with the connected monitor.
4. Validate transducer readings.
5. Test alarm and buffered outputs if applicable.

⚠️ Troubleshooting Tip

If channels remain in a NOT OK condition, first verify transducer compatibility. The 170190-01 is intended for Internal Dual Proximitor modules and supported Bently Nevada vibration sensors. Installing the incorrect 170190-02 version can produce measurement faults with incompatible transducers.

Frequently Asked Questions (FAQ)

Q1. What is the primary function of the 170190-01?

It provides galvanic isolation between FieldMonitor electronics and field-mounted sensors installed in hazardous locations, allowing intrinsically safe operation without external zener barriers.

Q2. What is the difference between the 170190-01 and 170190-02?

The 170190-01 supports the 170133 and 170172 Internal Dual Proximitor modules and most standard Bently Nevada proximity probes, velocity transducers, Velomitor sensors, and accelerometers used with 170180 Transducer I/O Modules. The 170190-02 is specifically designed for CEC 4-131 and equivalent velocity transducers. Selecting the wrong version can lead to incorrect sensor operation.

Q3. Can I install this module in a hazardous area?

No. The isolator and associated FieldMonitor modules are installed in a safe area (Division 2 / Zone 2), while the connected transducers may be located in hazardous areas. Always follow the applicable installation drawings and hazardous-area approvals.

Q4. Is the 170190-01 still available?

Yes, but it is considered a legacy product. Most available inventory comes from new surplus stock or qualified industrial spare-parts suppliers, so lead time can vary.

Q5. Can I hot-swap the module?

No. Although the hardware is modular, replacing the isolator with power applied is not recommended. Isolate power before replacement to avoid communication faults and protect connected monitoring equipment.

Q6. What installation mistake causes the most downtime?

The most common issue is ordering the wrong isolator revision. Many engineers assume the 170190-01 and 170190-02 are interchangeable because they share the same mechanical design. They are not. Always verify the connected transducer type before ordering the replacement module.