Description
Product Overview
The Bently Nevada 3500/61-01-05 is a six-channel temperature monitoring module developed for critical machinery protection applications in hazardous industrial environments.
This configuration combines advanced temperature monitoring functions with integrated recorder outputs and international hazardous-area approvals, making it suitable for offshore installations, petrochemical plants, gas compression stations, and power generation facilities.
The module continuously acquires RTD and thermocouple signals, evaluates alarm conditions, and transmits proportional analog outputs for external monitoring, trending, or legacy control integration.
Configuration Details
The 3500/61-01-05 configuration includes:
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3500/61 Main Temperature Monitor
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RTD/TC Non-Isolated I/O Module with Internal Terminations
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Integrated recorder output functionality
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Multi-agency hazardous-area certification package
The “01” option specifies internal field terminations mounted directly on the rear I/O module, while the “05” approval option supports international hazardous-area installation requirements.
Key Functional Features
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Six independently programmable temperature channels
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Mixed RTD and thermocouple sensor compatibility
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Integrated 4–20 mA recorder outputs for each channel
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Continuous Alert and Danger setpoint comparison
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Fast update cycle for machinery protection applications
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Internal screw-terminal field wiring design
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Certified for Zone 2 and Division 2 installations
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API 670 compliant monitoring architecture
Technical Specifications
| Parameter |
Specification |
| Model |
3500/61-01-05 |
| Product Type |
Temperature Monitor with Recorder Outputs |
| Series |
3500 Machinery Protection System |
| Monitoring Channels |
6 independent channels |
| I/O Style |
Internal Termination RTD/TC I/O |
| Sensor Inputs |
RTD and Thermocouple |
| Supported RTDs |
100 Ω Platinum, 10 Ω Copper, 120 Ω Nickel |
| RTD Wiring |
3-wire and 4-wire |
| Supported Thermocouples |
E, J, K, T, R, S |
| Recorder Outputs |
6 x 4–20 mA outputs |
| Output Protection |
Short-circuit protected |
| Maximum Output Load |
600 Ω |
| Input Impedance |
>10 MΩ for TC inputs |
| Signal Resolution |
0.1°C or 1°F |
| Typical Accuracy |
±1°C |
| Channel Isolation |
500 Vdc channel-to-ground |
| Update Time |
Less than 1 second |
| Alarm Functions |
Independent Alert and Danger setpoints |
| Power Consumption |
9 W maximum |
| Operating Temperature |
-30°C to +65°C |
| Storage Temperature |
-40°C to +85°C |
| Relative Humidity |
95% non-condensing |
| Rack Space Requirement |
One front slot and one rear slot |
Hazardous Area Certifications
The 3500/61-01-05 configuration is intended for installations requiring multiple international hazardous-area approvals.
Supported certification categories include:
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Class I Division 2 Groups A, B, C, D
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Class I Zone 2 hazardous locations
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ATEX Zone 2 compliance
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IECEx certified installations
The module is suitable for non-incendive and increased-safety industrial applications where explosive gas atmospheres may occasionally be present.
Typical Applications
Common installation environments include:
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Offshore oil and gas platforms
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LNG and gas compression facilities
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Steam and gas turbine systems
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Generator stator temperature monitoring
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Petrochemical processing units
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Hazardous-area compressor protection systems
FAQ
Q1: What is the advantage of recorder outputs on this module?
The integrated 4–20 mA outputs allow connection to chart recorders, DCS systems, PLC analog inputs, and legacy plant monitoring equipment.
Q2: Can RTD and thermocouple inputs operate simultaneously?
Yes. Each of the six channels can be independently configured for different supported sensor types.
Q3: Is the module suitable for hazardous-area installations?
Yes. The “05” option includes multiple international approvals for Zone 2 and Division 2 environments.
