Bently Nevada 172025 | Internal Termination I/O Module | 3500/25 Keyphasor System

Product Description:

The Bently Nevada 172025 is a high-performance Internal Termination I/O Module designed specifically for the 3500/25 Enhanced Keyphasor Module. This half-height module is installed in the rear of the 3500 rack and provides the necessary connections and power supply for field transducers, including Proximitor sensors and magnetic pickups. It plays a vital role in enabling accurate vibration and speed monitoring by providing phase reference signals to the 3500/25 monitor module.

The 172025 facilitates the input of timing pulses (one pulse per revolution) which are essential for determining shaft RPM, phase angles, and for advanced vibration analysis. It supports two independent Keyphasor channels and is equipped with built-in protective circuitry to safeguard the internal rack bus from any electrical faults or transients from the field wiring.

Key Features & Functions:

1. Integrated Transducer Power:
   The 172025 module powers the connected Proximitor sensors with a stable -24 VDC supply. This internal power source eliminates the need for external power supplies, ensuring clean and reliable operation for accurate timing pulses.

2. Signal Routing:
   This module routes raw analog signals from field transducers to the 3500/25 monitor module on the front of the rack. It also provides a common ground reference, crucial for preventing erroneous readings caused by floating signals.

3. Half-Height Form Factor:
   Designed to save rack space, the 172025 is a half-height I/O module, allowing for two I/O modules to be stacked in a single rack slot. This configuration provides true hardware redundancy, ensuring continuous protection for critical machinery like turbines or compressors.

4. Simplified Wiring:
   The module features clearly labeled screw terminals (SIG, COM, VT) for easy and straightforward wiring. Additionally, the front monitor module can be removed or replaced (hot-swapped) without having to disconnect the field wiring, enhancing system uptime and ease of maintenance.

Technical Specifications:

Installation & Configuration:

• The 172025 module installs in the rear of the 3500 rack, directly behind the 3500/25 Enhanced Keyphasor Module.

• It requires no additional external power supplies, as it provides the -24 VDC power directly to the Proximitor sensors.

• Wiring: The screw terminals are clearly marked (SIG, COM, VT), simplifying installation. The field wiring can remain connected even when the front monitor module is replaced or serviced (hot-swapped).

• Configuration: The module is configured via the Bently Nevada 3500 Rack Configuration Software.

Applications:

The Bently Nevada 172025 Internal Termination I/O Module is used in vibration monitoring and machinery protection systems, especially in high-speed rotating machinery like turbines, compressors, and other industrial equipment that requires precise monitoring of RPM and vibration phase. It is commonly deployed in the following industries:

• Power Generation: Ensuring the reliability and efficiency of turbines and generators.

• Oil & Gas: For monitoring critical equipment in harsh environments.

• Manufacturing: Protecting high-speed motors and machinery from damage due to excessive vibration.

Frequently Asked Questions (FAQ):

Q: What is the purpose of the Bently Nevada 172025 module?
A: The 172025 is an Internal Termination I/O Module used to connect Proximitor sensors or magnetic pickups to the 3500/25 Keyphasor Module, providing phase reference signals for accurate vibration and speed monitoring.

Q: Does the 172025 module require external power for sensors?
A: No, the 172025 provides -24 VDC power directly to the Proximitor sensors, eliminating the need for external power supplies.

Q: How does the 172025 module handle wiring?
A: The module features compression screw terminals for easy wiring. The terminals are clearly labeled (SIG, COM, VT) for each channel, making the installation process straightforward.

Q: Can the 172025 module be replaced without disconnecting wiring?
A: Yes, the module is designed for hot-swapping, so you can replace the front monitor without disconnecting the field wiring at the back of the rack.