Bently Nevada 3500/60-01-02 RTD Temperature Monitor

Product Introduction

The Bently Nevada 3500/60-01-02 temperature monitor provides continuous temperature measurement for critical rotating machinery. This module accepts signals from up to six RTD or thermocouple transducers, then conditions these signals for protection and monitoring purposes. Specifically, this model features the -01 I/O module type, which is a non-isolated design with internal terminations, and the -02 agency approval option, which includes ATEX, IECEx, and CSA certifications for Class 1, Zone 2 hazardous locations. This combination makes the 3500/60-01-02 ideal for installations requiring both reliable temperature monitoring and hazardous area compliance. The module works with various RTD types, including 100Ω platinum, 120Ω nickel, and 10Ω copper sensors, as well as multiple thermocouple types.

Technical Specifications

Inputs and Transducer Compatibility

The 3500/60-01-02 accepts signals from one to six RTD or thermocouple transducers. The input impedance measures 10 MΩ for each lead input. This module supports a wide variety of temperature sensors. For thermocouples, it works with Type E (-100°C to +1000°C), Type J (-18°C to +760°C), Type K (-18°C to +1370°C), and Type T (-160°C to +400°C). For RTDs, the 3500/60-01-02 supports 100Ω 3-wire and 4-wire platinum RTD with alpha values of 0.00385 and 0.00392, 120Ω 3-wire and 4-wire nickel RTD, and 10Ω 3-wire and 4-wire copper RTD. Furthermore, when using external barriers, the operating ranges adjust accordingly for each sensor type.

Power Consumption and Physical Configuration

The 3500/60-01-02 consumes approximately 7 watts during normal operation. The monitor module occupies one full-height front slot in the 3500 rack, while the I/O modules occupy one full-height rear slot. The monitor module measures 241.3 mm x 24.4 mm x 241.8 mm and weighs 0.91 kg. The I/O module, in contrast, measures 241.3 mm x 24.4 mm x 99.1 mm and weighs 0.45 kg. This compact footprint allows for efficient use of rack space in crowded control cabinets.

Outputs and Status Indication

Several visual status LEDs appear on the front panel. Specifically, the OK LED indicates proper module operation, the TX/RX LED shows communication activity with other modules in the rack, and the Bypass LED signals when the monitor is in Bypass Mode. The 3500/60-01-02 provides individual +4 to +20 mA recorder outputs for each channel. These values are proportional to the monitor's full-scale range. Importantly, short circuits on these recorder outputs do not affect monitor operation. The RTD current source delivers 925 ±15 µA at 25°C per transducer.

Accuracy and Environmental Specifications

Measurement Accuracy

Accuracy specifications vary depending on the configuration. For internal termination non-isolated configurations, the 3500/60-01-02 achieves ±3°C at 25°C in both bulkhead and standard racks. For external termination non-isolated configurations, bulkhead racks offer ±3°C while standard racks achieve ±1°C at 25°C. For 10Ω copper RTDs specifically, the resolution is 1°C or 1°F with an accuracy of ±3°C at 25°C. The cold junction compensation sensor, which is used for thermocouple measurements, maintains an accuracy of ±1°C at 25°C. Alarm accuracy stays within 0.13% of the desired value.

Environmental Operating Limits

The 3500/60-01-02 operates across a wide temperature range. When using internal or external termination I/O modules, the operating temperature ranges from -30°C to +65°C. However, when using internal barrier I/O modules, the operating range narrows to 0°C to +65°C. For storage, the module withstands temperatures from -40°C to +85°C. This broad operating range ensures reliable performance in various industrial environments, including those with extreme temperature variations.

Installation and Configuration

Mounting and Connections

Installing the Bently Nevada 3500/60-01-02 requires attention to the module's physical placement. First, ensure the 3500 rack is powered down before inserting or removing any module. Then, slide the monitor module into the designated front slot until fully seated, and install the corresponding I/O module in the rear slot. After that, secure both modules using the retaining screws. The internal terminations on this -01 version allow for direct wiring of sensors to the module's connectors, which simplifies the overall installation process. This module uses the bulkhead rack style, which provides terminal connections directly on the I/O module.

Transducer Configuration

Configuring the 3500/60-01-02 requires setting up the correct transducer types and ranges. Users can configure the module using the 3500 rack configuration software, which allows selection of sensor type, measurement units (°C or °F), and alarm setpoints. For RTD measurements, the module supports 3-wire and 4-wire connections. For thermocouple measurements, the cold junction compensation ensures accurate readings. The user can set Alert and Danger setpoints from 0 to 100% of full-scale, with sensor range limiting the setpoint when the full-scale range exceeds sensor capabilities. Furthermore, alarm time delays are programmable, with Alert delays from 1 to 60 seconds in 1-second intervals and Danger delays from 1 to 60 seconds in 0.5-second intervals.

Hazardous Area Compliance

The -02 agency approval option qualifies the 3500/60-01-02 for use in hazardous areas. Specifically, this module carries ATEX, IECEx, and CSA certifications for Class 1, Zone 2 applications. This approval makes it suitable for installations in oil and gas facilities, chemical plants, and other environments where explosive atmospheres may be present. The internal termination design contributes to the module's safety certification while maintaining ease of installation.

Packaging List

The shipment for the 3500/60-01-02 includes the following items:

• 1 x Bently Nevada 3500/60-01-02 Temperature Monitor Module

• 1 x Installation and Configuration Manual

• 1 x I/O Module with internal terminations (non-isolated type)

• 1 x Standard I/O Connector Kit

Note: Certificates and warranty documents are not included in the packaging list and are handled separately.

Shipping Method: All orders are shipped via FedEx, UPS, or DHL to ensure fast and reliable delivery worldwide.

Frequently Asked Questions (FAQ)

1. What sensors are compatible with the Bently Nevada 3500/60-01-02?
The 3500/60-01-02 accepts various RTD types, including 100Ω platinum (both 0.00385 and 0.00392 alpha), 120Ω nickel, and 10Ω copper RTDs, along with thermocouple types E, J, K, and T.

2. What is the difference between the -01 and other I/O module types for the 3500/60?
The "-01" designation indicates a non-isolated I/O module with internal terminations. Other versions may offer isolated designs or external terminations depending on application requirements.

3. What hazardous area approvals does the 3500/60-01-02 carry?
The "-02" approval option provides ATEX, IECEx, and CSA certifications for Class 1, Zone 2 hazardous locations. This makes the 3500/60-01-02 suitable for installations in potentially explosive environments.

4. How do I configure alarm setpoints on the 3500/60-01-02?
You can configure Alarm and Danger setpoints using the 3500 rack configuration software. Both under and over alarm setpoints are available, with adjustable time delays from 1 to 60 seconds.

5. What is the typical power consumption of the 3500/60-01-02?
The 3500/60-01-02 typically consumes 7 watts during normal operation, making it an energy-efficient choice for temperature monitoring applications.