Description
Bently Nevada™ 3500/60 Temperature Monitor — I/O Module Part No. 136711-01
Product Overview
The Bently Nevada 3500/60 is a six-channel temperature monitoring module within the 3500 Series Machinery Protection System. Part No. 136711-01 is the dedicated RTD/TC I/O Module with Internal Barriers and Internal Terminations (Non-Isolated) — a rear-slot I/O module designed to interface temperature transducers directly to the 3500/60 main monitor module (Part No. 163179-01) while providing built-in intrinsic safety protection via internal barriers.
This I/O module enables the 3500/60 to accept inputs from both Resistance Temperature Detectors (RTDs) and Thermocouples (TCs), conditioning the signals and comparing measured values against user-programmable alarm setpoints to drive machinery protection logic. The internal barrier design eliminates the need for external safety barriers in hazardous-area installations, simplifying wiring architecture and reducing panel footprint.
3500/60 136711-01
Key Features
| Feature | Description |
|---|---|
| Channels | 6 independent temperature input channels |
| Input Compatibility | RTD and Thermocouple (TC) — field-configurable via software |
| Internal Barriers | Built-in intrinsic safety barriers — no external barriers required |
| Internal Terminations | On-board terminal blocks for direct transducer wiring |
| Configuration Flexibility | Accepts pure RTD, pure TC, or mixed RTD/TC inputs |
| Channel Isolation | Non-isolated (barrier-protected); 250 Vdc isolation available on alternate I/O variants |
| Alarm Setpoints | User-programmable Alert and Danger thresholds via 3500 Rack Configuration Software |
| TMR Support | Triple Modular Redundant configuration with dual voting logic |
| Field-Configurable | Full-scale ranges set via software — no calibration required |
Technical Specifications
I/O Module Specifics (136711-01)
| Parameter | Specification |
|---|---|
| Type | RTD/TC Non-Isolated I/O Module with Internal Barriers & Internal Terminations |
| Dimensions (H × W × D) | 241.3 mm × 24.4 mm × 163.1 mm (9.50 in × 0.96 in × 6.42 in) |
| Weight | 0.46 kg (1.01 lb) |
| Rack Space | 1 full-height rear slot |
| Operating Temperature | 0 °C to +65 °C (+32 °F to +150 °F) |
| Storage Temperature | −40 °C to +85 °C (−40 °F to +185 °F) |
System-Level Inputs (via 3500/60 Main Module)
| Parameter | Specification |
|---|---|
| Signal | 1 to 6 RTD or TC transducer signals |
| Input Impedance | >10 MΩ per lead input |
| RTD Current Source | 925 ±15 µA @ 25 °C per transducer |
Supported Transducers
Thermocouples (TCs):
| Type | Range |
|---|---|
| Type E | −100 °C to +1000 °C (−148 °F to +1832 °F) |
| Type J | 0 °C to +760 °C (+32 °F to +1400 °F) |
| Type K | 0 °C to +1370 °C (+32 °F to +2498 °F) |
| Type T | −160 °C to +400 °C (−256 °F to +752 °F) |
RTDs:
| Type | Range |
|---|---|
| 100 Ω Platinum (α = 0.00385), 3-wire & 4-wire | −200 °C to +850 °C (−328 °F to +1562 °F) |
| 100 Ω Platinum (α = 0.00392), 3-wire & 4-wire | −200 °C to +700 °C (−328 °F to +1292 °F) |
| 120 Ω Nickel, 3-wire & 4-wire | −80 °C to +260 °C (−112 °F to +500 °F) |
| 10 Ω Copper, 3-wire & 4-wire | −100 °C to +260 °C (−148 °F to +500 °F) |
3500/60 136711-01
Performance
| Parameter | Specification |
|---|---|
| Resolution | 1 °C or 1 °F |
| Accuracy (Internal Termination, Non-Isolated) | ±3 °C at 25 °C |
| Accuracy (Internal Termination Isolated) | ±2 °C at 25 °C |
| Accuracy (External Termination Isolated) | ±1 °C at 25 °C |
| Cold Junction Compensation | ±1 °C at 25 °C |
| Alarm Accuracy | Within 0.13% of desired value |
Power & Environmental
| Parameter | Specification |
|---|---|
| Power Consumption (3500/60 Main Module) | 7 W nominal |
| Power Consumption (3500/61 Main Module) | 9 W nominal |
| Main Module Operating Temperature | −30 °C to +65 °C (−22 °F to +150 °F) |
| Main Module Dimensions | 241.3 mm × 24.4 mm × 241.8 mm (9.50 in × 0.96 in × 9.52 in) |
| Main Module Weight | 0.91 kg (2.0 lb) |
Application Scenarios
The 3500/60 with I/O Module 136711-01 is purpose-built for temperature-critical machinery protection in hazardous and general industrial environments, fully compliant with API 670 standards. The internal barrier configuration is particularly advantageous in applications where intrinsic safety is mandated but external barrier panels are impractical or space-constrained.
Typical applications include:
- Radial Bearing Metal Temperature — continuous thermal surveillance of turbine, compressor, and pump bearings
- Thrust Bearing Metal Temperature — detection of thrust overload conditions in large rotating machinery
- Compressor Suction & Discharge Temperatures — thermal protection for reciprocating and centrifugal compressors
- Steam Temperature Monitoring — turbine supervisory instrumentation (TSI) for steam path thermal management
- Motor Stator Temperatures — overheating protection for large AC/DC motors and generators
- Process Temperature Differentials — delta-T monitoring for heat exchangers, cooling circuits, and lubrication systems
Supporting Components & Ecosystem
Essential System Components
| Component | Function |
|---|---|
| 3500/60 Main Module (163179-01) | Front-slot temperature monitor — requires I/O Module 136711-01 in the rear slot |
| 3500/05 System Rack | Houses all monitor modules and power supplies; 19″ standard or 14″ mini configurations |
| 3500/15 Power Supply | AC/DC power module; supports redundant dual-supply operation |
| 3500 Rack Configuration Software | Field-configures channels, alarm setpoints, transducer types, and TMR voting |
| 3500/22M TDI | Transient Data Interface — enables data communication with System 1™ software |
I/O Module Variants & Accessories
| Part Number | Description |
|---|---|
| 133819-01 | RTD/TC Non-Isolated I/O Module, Internal Terminations (no barriers) |
| 133827-01 | RTD/TC Non-Isolated I/O Module, External Terminations |
| 133835-01 | TC Isolated I/O Module, Internal Terminations |
| 133843-01 | TC Isolated I/O Module, External Terminations |
| 136711-01 | RTD/TC I/O Module with Internal Barriers & Internal Terminations |
| 133908-01 | RTD/TC Non-Isolated External Termination Block (Terminal Strip) |
| 133916-01 | RTD/TC Non-Isolated External Termination Block (Euro Style) |
| 133924-01 | TC Isolated External Termination Block (Terminal Strip) |
| 133932-01 | TC Isolated External Termination Block (Euro Style) |
| 134544-AAAA-BB | Transducer Signal to External Termination Cable |
Complementary 3500 Modules
| Module | Role |
|---|---|
| 3500/32M | 4-Channel Relay Module — alarm and shutdown logic |
| 3500/33 | 16-Channel Relay Module |
| 3500/92 | Communication Gateway — Modbus/TCP, Ethernet, serial integration |
| 3500/94M | VGA Touchscreen Display — local HMI for rack data |
| 3500/25 | Keyphasor® Module — phase reference and speed measurement |
| 3500/42M | Proximitor®/Seismic Monitor — vibration and position monitoring |
Related & Alternative Models
| Model | Description |
|---|---|
| 3500/60-01-00 (with 133819-01) | Standard RTD/TC Non-Isolated, Internal Terminations — no barriers |
| 3500/60-02-00 (with 133827-01) | RTD/TC Non-Isolated, External Terminations |
| 3500/60-03-00 (with 133835-01) | TC Isolated, Internal Terminations — 250 Vdc channel-to-channel isolation |
| 3500/60-04-00 (with 133843-01) | TC Isolated, External Terminations |
| 3500/60-05-00 (with 136711-01) | RTD/TC with Internal Barriers & Internal Terminations |
| 3500/61 | Six-channel temperature monitor with +4 to +20 mA recorder outputs per channel |
| 3500/61-05-00 (with 136711-02) | Recorder-output variant with internal barriers |
| 3500/65 | 16-channel temperature monitor for high-density RTD/TC applications |
| 3500/62 | Process Variable Monitor — accepts 4–20 mA and ±10 Vdc inputs |
Certifications & Compliance
- EMC: EN 61000-6-2 (Immunity), EN 61000-6-4 (Emissions)
- Electrical Safety: EN 61010-1
- Hazardous Area: CSA/NRTL/C Class I, Div 2; ATEX/IECEx Class I, Zone 2
- Maritime: ABS, DNV GL
- RoHS: Directive 2011/65/EU
Summary
The Bently Nevada 3500/60 I/O Module 136711-01 is a specialized rear-slot I/O module that integrates intrinsic safety barriers and internal terminations into a single compact assembly. Designed for use with the 3500/60 Temperature Monitor (163179-01), it enables direct connection of RTD and thermocouple transducers in hazardous-area applications without requiring external safety barriers. With its software-configurable channel types, API 670-compliant alarm logic, and seamless integration into the 3500 Series protection architecture, the 136711-01 delivers a space-efficient, cost-optimized solution for thermal protection of critical rotating machinery across power generation, oil & gas, petrochemical, and process industries.
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