Product Overview

The 128718-01 is a high-precision interface component specifically engineered for use with the Bently Nevada 3500/25 Enhanced Keyphasor Module. As a dedicated External Termination Block (ETB), it functions as the central landing point for field wiring from Keyphasor transducers before signals are routed into the 3500 monitoring rack. This hardware is essential for systems configured with external termination I/O modules, providing a robust and accessible connection point that protects signal integrity. By isolating field connections from the rack's internal backplane, the 128718-01 simplifies troubleshooting and maintenance while ensuring that critical phase and speed pulses are transmitted without interference.

Essential Hardware Parameters

• System Series: 3500/25 Enhanced Keyphasor System

• Order Number: 128718-01

• Connection Style: Euro-style screw terminals for secure field wiring

• Application Compatibility: Designed for use with 3500/25 External Termination I/O modules

• Physical Weight: 0.34 kg (0.75 lbs)

• Unit Dimensions: 25.6 cm x 12.0 cm x 2.4 cm

• Housing Material: Industrial-grade high-durability polymer

• Terminal Density: Supports multiple Keyphasor input channels and common grounds

Industrial Application Environments

The 128718-01 is a staple in complex machinery protection architectures, particularly where high-speed rotating equipment requires precise timing references. Its primary applications include:

• Turbine Phase Reference: Providing the landing point for Once-Per-Turn signals used in vibration diagnostics for steam and gas turbines.

• High-Density Control Cabinets: Facilitating organized cable management in large-scale plants where multiple 3500 racks are interconnected.

• Remote Signal Testing: Serving as a convenient test point for technicians to verify transducer pulse output without opening the main monitoring rack.

• Critical Asset Protection: Ensuring secure electrical contact for speed signals in oil and gas compression trains and power generation facilities.

FAQ

Q: Is the 128718-01 required for every 3500/25 installation?

A: No, it is only required if your 3500/25 system is configured with an "External Termination" I/O module. If your system uses "Internal Terminations," the field wires connect directly to the back of the rack.

Q: Can I use this termination block with 3500/42M Proximitor modules?

A: While specifically designed for Keyphasor signals within the 3500/25 framework, Bently Nevada often uses similar Euro-style blocks across the 3500 series. However, you should always verify the specific signal pinouts to ensure compatibility with non-Keyphasor monitors.

Q: What type of cable connects this block to the 3500 rack?

A: The 128718-01 typically connects to the I/O module on the back of the 3500 rack via a multi-conductor shielded cable with specialized D-sub or circular connectors, depending on your specific I/O module version.

Q: How does this block handle sensor shielding?

A: The Euro-style terminals include designated shield terminals, allowing for the proper termination of cable drains to prevent electromagnetic interference from distorting the Keyphasor pulse.

Q: Is this component in stock for immediate shipment?

A: Yes, we maintain the 128718-01 in brand-new condition in our inventory, ready for rapid dispatch via FedEx or UPS with a 12-month warranty.