Bently Nevada 135473-01 3500/25 Keyphasor I/O Module (Internal Barriers)

Product Overview

The Bently Nevada 135473-01 is a specialized half-height I/O module designed for the 3500/25 Enhanced Keyphasor system. This specific configuration integrates Internal Barriers and Internal Terminations, providing a hardware-based intrinsic safety interface for transducers located in hazardous areas. The module is engineered to receive and process once-per-turn or multiple-per-turn pulse signals from proximity probes or magnetic pickups, which are essential for calculating machine rotative speed and providing a phase reference for vibration analysis.

The 135473-01 acts as the physical interface within the 3500 rack, ensuring electrical isolation and signal conditioning for critical machinery protection. While the module supports phase measurements, it is optimized for high-accuracy shaft speed monitoring. When utilizing the internal barrier version, the module provides a secure connection point that limits electrical energy dispatched to field sensors, complying with rigorous industrial safety standards for explosive atmospheres.

Technical Configuration

Ordering Information

Industrial procurement should focus on the specific part number to ensure compatibility with the 3500/25 monitor configuration.

• Part Number: 135473-01

• Description: Keyphasor I/O Module with Internal Barriers and Internal Terminations

• Condition: Original New

• Availability: Spare Part Stock

FAQ

• Can this module provide isolation for Proximitor applications?

  Yes, it is compatible with Proximitor applications but requires an external power supply to provide isolation.

• What is the primary design intent of the Isolated I/O version?

  It was created specifically for magnetic pickup applications where signals are tied in parallel to multiple devices, such as control systems.

• What happens if input signals exceed the specified range?

  Signals exceeding the specified voltage range are limited internally by the module circuitry.

Technical Reference: Wiring, Jumpers, and Specifications

1. CHANNEL WIRING & PIN DEFINITIONS

The 135473-01 is an Internal Termination I/O module with built-in Galvanic Barriers. It features two independent terminal strips for Channel 1 and Channel 2.

A. Proximity Probe Wiring (3-Wire)

For standard eddy current sensors (e.g., 3300 XL series):

• PWR (-24V): Power output for the Proximitor.

• COM (GND): Signal common/return.

• SIG (OUT): Input for the pulse voltage signal.

B. Magnetic Pickup Wiring (Passive 2-Wire)

For self-generating electromagnetic speed sensors:

• SIG: Connect to sensor positive (+) lead.

• COM: Connect to sensor negative (-) lead.

• PWR: Must remain disconnected (Floating).

C. Shielding and IS Grounding

• SHLD (Shield): Connect field cable shields to this dedicated terminal.

• IS Earth : This module must be grounded via the 136719-01 Barrier Earth Module to a dedicated Intrinsic Safety ground bus to ensure explosion-proof integrity.

2. HARDWARE JUMPER CONFIGURATIONS

Jumpers are located on the internal circuit board and must be set before installation.

IMPORTANT: Always power down the 3500 rack or remove the Monitor Module before adjusting jumpers to avoid electrical arcing.

3. CORE PERFORMANCE SPECIFICATIONS

• Channel Capacity: 2 independent input channels.

• Frequency Range: 1 to 1,200,000 cpm (0.017 Hz to 20 kHz).

• Input Voltage Range: +5V to -11V (specifically for Barrier I/O).

• Conditioning Modes:

• Auto Threshold: Min signal 2 V peak-to-peak; min speed 120 rpm.

• Manual Threshold: Adjustable from 0 to -20 Vdc; min signal 500 mV; supports low speed down to 1 rpm.

• Environmental:

• Power Consumption: 3.2 Watts (Typical).

• Operating Temperature: 0 deg C to 65 deg C.

4. HAZARDOUS AREA CERTIFICATIONS

Designed for high-risk environments:

• North America: Class I, Div 2, Groups A, B, C, D.

• Europe (ATEX): II 1 G [EEx ia] IIC (Inputs rated for Zone 0).

5. SYSTEM CONFIGURATION SUPPORT

After the physical installation, use the 3500 Rack Configuration Software to verify:

1. Hysteresis Settings: To prevent false triggering on noisy signals.

2. Orientation: Setting the pulse direction (Positive/Negative).

3. Active Channels: Ensuring the software matches the physical jumper settings.

PART 2: TERMINAL DIAGRAMS & SOFTWARE CONFIGURATION

1. TERMINAL BLOCK PINOUT (A/B/C/D)

The 135473-01 uses a specific 4-terminal sequence for each channel. Below is the mapping for connecting your field wiring:

2. SOFTWARE CONFIGURATION (3500 RACK CONFIG)

Once the hardware is installed, you must configure the following in the software utility:

A. Threshold Settings

• Auto Threshold:

• The system automatically calculates the trigger point at 50% of the signal amplitude.

• Best for: Standard operating speeds (>120 rpm) with clean, consistent pulses.

• Manual Threshold:

• You manually set a fixed voltage (e.g., -8.0 Vdc).

• Best for: Low-speed start-ups or signals with significant "glitch" or noise.

• Calculation Tip: Set the threshold to the midpoint between the pulse peak and the baseline signal.

B. Hysteresis (Noise Reduction)

• For Magnetic Pickups, you should set a Hysteresis value (typically 0.2V to 0.5V) to prevent the monitor from "double-triggering" if the signal is noisy as it crosses the threshold.

C. Active Edge (Direction)

• Negative Edge: Triggers as the signal goes from 0V toward -24V (Standard for most Bently probes).

• Positive Edge: Triggers as the signal moves in a positive direction.

3. CRITICAL INSTALLATION CHECKLIST

1. Barrier Earth: Ensure the 136719-01 module is installed in the rack. Without this, the 135473-01 cannot properly ground the internal safety barriers.

2. Jumper Audit: Double-check that Channel 1 and Channel 2 jumpers match their respective sensors. A common error is leaving the PWR jumper on INT when using a Magnetic Pickup, which can induce noise or heat.

3. Encoding: Use deg C and Celsius in your technical documentation to avoid the corrupted character issues previously encountered in your CMS.