Bently Nevada 136719-01 3500/04 Earthing I/O Module

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

The Bently Nevada 136719-01 serves as the 3500/04 Earthing I/O Module, an indispensable safety component inside 3500 Machinery Protection System racks utilizing internal intrinsic safety (IS) barriers. Positioned at the rear of the chassis, this module establishes a reliable, low-impedance ground return path for transisitor circuitry, proximity probes, and magnetic pickups operating in explosive or hazardous field atmospheres. By converting and locking the monitoring assembly ground to an industrial standard safety ground, it limits electrical energy levels to prevent hazardous arc ignition.

Securing the 136719-01 under a New Surplus procurement protocol is critical to safeguarding the overall Total Cost of Ownership (TCO) of your plant safety infrastructure. Because this grounding card governs the physical safety integrity of your monitoring loops, opting for cheap, unverified used modules exposes your plant to unseen corrosion on the earthing paths and terminal degradation. Keeping 1–2 factory-sealed units on-site serves as an essential insurance policy, guaranteeing regulatory compliance and eliminating the risks of catastrophic instrumentation damage or sudden stock-out scenarios.

136719-01

Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

1. Completely isolate power to the target 3500 monitoring rack following local lock-out/tag-out safety guidelines.
2. Put on an approved ESD-safe grounding wrist strap and secure the alligator clip to an unpainted metal section of the control panel frame.
3. Test the main earth ground terminal block within the cabinet to ensure it satisfies Bently Nevada low-impedance earthing standards (typically less than 1 Ω).

Stage 2: Removal

1. Label and disconnect any external ground lines or shield drains wired to the existing earthing I/O module.
2. Unfasten the upper and lower mounting screws on the rear faceplate of the faulty module using a flathead tool.
3. Slide the earthing card straight out of the rear slot chassis guides, avoiding any twisting motions that could damage the backplane connector pins.

Stage 3: Installation (Clone & Seat)

1. Remove the new surplus 136719-01 board from its static-shielded packaging and visually inspect the backplane interface contacts.
2. Align the module with the dedicated rear slot tracks corresponding to the internal barrier assembly configuration.
3. Slide the card firmly inward until the connector seats fully into the rack backplane, then tighten the upper and lower retaining screws.
4. Re-terminate all grounding wires and shield drains to their exact designated screw terminals.

Stage 4: Power-On & Testing

1. Re-energize the 3500 chassis power supplies and observe the master status indicator lights on the front of the rack.
2. Use a digital multimeter to confirm continuity between the module’s ground terminal screws and the master plant safety ground bus.
3. Run the 3500 Rack Configuration diagnostic interface to ensure that the internal safety barrier loop reads as healthy and free of ground fault flags.

Firmware/Software Versions & Upgrade Notes

As a dedicated safety grounding component, the 136719-01 Earthing I/O Module operates primarily as a physical hardware layer and does not contain programmable flash firmware. However, its layout relies heavily on hardware revision compatibility with the active 3500/04 front panel earthing display assemblies (such as the 138257-01 front module) and surrounding barrier modules.

When replacing or introducing this component into an existing rack, you must verify the physical version suffix of the surrounding cards (e.g., 135489-01 or 136703-01 internal barrier I/O modules). Mismatched hardware generations can prevent the rack from forming a unified ground plane, resulting in system static build-up and intermittent channel communication issues.

Frequently Asked Questions (FAQ)

Q: Why does this Earthing I/O Module cost more than used alternatives listed online? A: This module is an authentic, completely unused OEM component preserved in its original factory storage conditions. Used or refurbished units pulled from old control cabinets frequently suffer from trace oxidation, screw thread stripping, or microscopic cracks along the high-current ground planes. Buying a verified new surplus unit guarantees the exact resistance profiles required for critical explosion-proof compliance, eliminating the risk of safety loop failures.

Q: Can a 3500 rack with internal safety barriers operate without the 136719-01 module installed? A: No. An Earthing Module is mechanically and operationally required in any Bently Nevada 3500 configuration that utilizes internal intrinsic safety barriers. Without this module, the internal barriers lack the necessary low-resistance ground connection to safely redirect fault currents away from hazardous areas.

Q: Can this rear earthing module be hot-swapped while the machinery monitoring system is live? A: No. You must never remove or install the earthing I/O module while the monitor rack has power active. Disconnecting the ground reference card while field sensors are energized can lead to dangerous floating ground voltages, which can damage adjacent cards or compromise intrinsic safety barriers in hazardous areas.

Q: What is the purpose of the distinct analog and digital ground routing on this card? A: The 136719-01 utilizes a specialized separate routing design to segregate low-voltage analog sensor grounds from high-frequency digital switching grounds. This prevents digital noise from corrupting delicate proximity probe signals, ensuring high-resolution vibration tracking.

Q: Does this grounding card require manual software address configuration before installation? A: No. The module does not use a digital network address and does not require software configuration files. It functions as a hardware-defined safety ground pathway, meaning it is ready for deployment immediately after physical installation and wiring.

Q: What type of warranty coverage is included with this New Surplus safety module? A: We provide a 1-year operational replacement warranty from the date of shipment. This warranty ensures the card will maintain total electrical integrity and meet all specified intrinsic safety parameters within your machine protection framework.