Description
Product Overview
The Bently Nevada 3500/61 Temperature Monitor Module is a dedicated multi-channel monitoring solution developed for continuous thermal supervision within the 3500 Machinery Protection System.
Designed for rotating equipment protection, the module processes signals from RTD and thermocouple sensors to identify abnormal temperature conditions before equipment damage occurs. It is commonly deployed on turbines, motors, compressors, generators, and auxiliary process systems where accurate thermal monitoring is critical for operational reliability.
The module combines high-speed signal processing, programmable alarm logic, and flexible sensor configuration in a compact rack-mounted design.
Key Features
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Six independently configurable temperature input channels
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Compatible with both RTD and thermocouple sensor technologies
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Continuous alarm and trip comparison processing
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Supports mixed sensor configuration per channel
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Fast update cycle for real-time machinery protection
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Galvanic isolation between field inputs and rack ground
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Integrated buffered outputs for diagnostics and testing
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Front module with dedicated rear I/O module architecture
Module Architecture
The 3500/61 operates using a dual-slot arrangement within the 3500 rack system:
This structure simplifies field wiring while maintaining reliable signal isolation and system integrity.
Technical Specifications
| Parameter |
Specification |
| Model |
3500/61 |
| Product Type |
Temperature Monitor Module |
| Series |
3500 Machinery Protection System |
| Monitoring Channels |
6 channels |
| RTD Compatibility |
3-wire and 4-wire RTD |
| Supported RTDs |
Platinum 100 Ω, Copper 10 Ω, Nickel 120 Ω |
| Thermocouple Inputs |
Type E, J, K, T, R, and S |
| Measurement Resolution |
0.1°C / 1°F |
| Typical Accuracy |
±1°C typical |
| Update Speed |
<1 second for all channels |
| Isolation Rating |
500 Vdc channel-to-ground isolation |
| Alarm Functions |
Independent Alert and Danger setpoints |
| Alarm Delay Range |
0.1 to 60 seconds configurable |
| Buffered Outputs |
Front-panel coaxial outputs |
| Typical Power Consumption |
7 W |
| Operating Temperature |
-30°C to +65°C |
| Storage Temperature |
-40°C to +85°C |
| Relative Humidity |
95% non-condensing |
| Voltage Range |
0 to +12 Vdc |
| Dimensions |
241.3 × 24.4 × 241.9 mm |
| Weight |
0.82 kg |
Application Areas
The module is widely used in industrial protection systems requiring stable and continuous temperature monitoring:
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Steam and gas turbines
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Electric motors and generators
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Compressors and pumps
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Petrochemical processing equipment
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Power generation systems
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Critical bearing and winding monitoring
Sensor Compatibility
The 3500/61 platform supports multiple industrial temperature sensing technologies, allowing mixed sensor deployment across channels. This flexibility enables one module to monitor bearings, windings, stator sections, and process temperatures simultaneously.
FAQ
Q1: Can RTD and thermocouple sensors be used together on the same module?
Yes. Each channel can be independently configured for different supported sensor types.
Q2: What is the purpose of the buffered output connectors?
The front-panel buffered outputs allow technicians to connect external diagnostic equipment without interrupting system operation.
Q3: Is the module suitable for continuous industrial operation?
Yes. The 3500/61 is engineered for permanent installation in demanding industrial monitoring environments.
