Bently 136711-01 3500/60 I/O Module with Internal Barriers

Description

Product Model: Bently 136711-01

• Brand / System: Bently Nevada / 3500 Series
• Series / Role: 3500/60 I/O Module with Internal Barriers & Terminations
• Key Features:
  1. Six-channel I/O module with built-in barrier and internal termination for 3500/60 rack use
  2. Eliminates need for external barrier modules by integrating barrier functionality on the board
  3. Compact design for rack integration with lower installation complexity
  4. Stock and supply available via industrial automation distributors (refurb / new)

Applications & Context in Bently Monitoring Systems

In vibration monitoring and machinery protection systems built around the Bently / GE 3500 platform, modules from the 3500/60 and 3500/61 series serve the role of temperature / RTD / thermocouple monitoring boards. These modules often interface with field sensors (RTDs, thermocouples) through barriers, isolators, or external termination boards.

The Bently 136711-01 is specifically an I/O module for the 3500/60 rack, providing six channels of I/O with internal barrier and termination built into the module itself. That means external barrier modules or discrete isolation circuitry can be omitted in installations that use this module.

This module is especially useful in retrofits or new installations where simplifying wiring, reducing component count, and improving reliability by reducing external connections are desirable. Integrators can save on additional barrier modules, wiring runs, and potential fault points by using a module that houses barrier infrastructure internally.

Industrial automation / parts sellers list 136711-01 as “I/O Module with Internal Barriers and Internal Terminations” in the 3500/60 family.

Because 3500 systems are frequently used in power plants, turbines, compressors, and heavy industrial machinery, having I/O modules with robust barrier protection contributes to safety, noise immunity, and overall system integrity.

Role, System Fit & Integration

The 136711-01 module is intended to plug into a 3500 rack’s 60-series location, replacing or supplementing standard 3500/60 I/O modules. Its integrated barriers and terminations mean that field sensor wires can connect directly to the module’s terminals, without needing separate barrier blocks in the wiring panel.

Within a system:

• The module receives analog sensor inputs (RTD, thermocouple, temperature transducers) or other I/O signals.
• It leverages its internal barrier and termination circuits to isolate, condition, and protect the input lines.
• The module communicates processed readings back to the rack’s internal bus and monitoring logic.
• Since the barrier and termination circuits are onboard, the module reduces external wiring complexity, fault points, and maintainability burdens.

One distributor describes it as “6 channel internal barrier” I/O module. Another listing confirms the same wording: “I/O Module with Internal Barriers and Internal Terminations.”

Because the 3500 platforms often use external barrier modules or barrier enclosures, use of 136711-01 can simplify cabinet layouts, improve reliability, and reduce panel clutter.

Technical Features & Benefits

Here are key features of 136711-01 and how they translate into field advantages:

Integrated Barrier & Termination
Unlike many I/O modules that require external barrier modules or isolator cards, 136711-01 incorporates barrier circuits and internal termination resistors on the module itself. This integration reduces the need for extra hardware, wiring complexity, and connection points prone to failure.

Six Channels of I/O
The module supports six distinct I/O channels, enabling multiple temperature or analog inputs per board. Depending on the 3500/60 family, these channels may support RTD, thermocouple inputs, or other sensor types (as is typical for 3500/60 modules)

Reliability & Reduced External Points of Failure
By embedding the barrier circuits, the module reduces wiring-related failures such as loose connections, barrier module faults, or mis-wiring. Internal termination ensures signal integrity and reduces need for external resistor networks.

Simplified Field Wiring
Field technician wiring is simplified: sensor leads route directly to the module’s terminals. There’s no need to route via separate barrier enclosures or terminal strip modules, reducing installation time, documentation complexity, and risk of wiring mistakes.

Available in New, Surplus, or Refurbished Condition
Multiple industrial parts suppliers list 136711-01 in stock (new or rebuilt), offering replacement options for legacy systems. Radwell, for instance, lists it as “I/O Module 6 channel internal barrier” with warranty on refurbished items.

Warranty / Supplier Terms
Supplier listings often include a 12-month warranty (for new items) or extended warranties (for refurbished items).

A potential downside: because it’s a more specialized module (with barrier circuits built in), fewer spares or variants may exist in the supply chain, so stocking is more critical.

Technical Specifications Table (Compiled & Inferred)

Installation & Maintenance Guidance

Here are practical tips and cautions when working with 136711-01:

Slot & Module Insertion
Ensure the module is seated fully in its designated 3500/60 rack slot. Poor insertion can result in missing signal continuity or broken barrier circuits.

Field Wiring & Connector Terminals
Because barrier circuits are internal, wire termination is crucial: torque terminals correctly, use proper gauge, shielded cables as needed. Poor wiring can defeat barrier efficacy.

Verification & Testing
After installation, test each channel with known inputs (RTD / thermocouple references) to confirm correct readings and barrier function. Monitor for isolation between channels.

Environmental Control & Ventilation
Although I/O modules typically dissipate modest heat, ensure adequate airflow and avoid adjacent heat sources. High ambient temperature or inadequate cooling could stress barrier components or terminations.

Spare Strategy
Because 136711-01 is a more specialized form factor, maintaining a pretested spare is prudent in mission-critical systems. Pre-label wiring, configuration, and test it ahead of time for fast field swaps.

Firmware / Module Compatibility
Ensure the 3500 rack, host monitoring software, and other modules are compatible with modules that include internal barrier functionality. There should be no conflicts with external barrier plans left in place.

Visual Inspection & Cleanliness
Keep connectors, barrier components, and module surfaces clean. Dust, corrosion, or debris can compromise the barrier insulation or signal integrity over time.

Periodic Integrity Checks
Perform insulation resistance testing or barrier leakage tests periodically (if the system supports it) to ensure barrier circuits remain effective over years.