Bently Nevada 3300/35 Temperature Module

This temperature module monitors thermal conditions in rotating machinery and process equipment. It accepts resistance temperature detectors and thermocouple inputs for precise measurements. The unit integrates into the Bently Nevada 3300 monitoring system rack.

Technical Specifications

Parameter	Specification
Model Number	3300/35-12-02-02-00-00
Product Type	Temperature Monitoring Module
Supply Voltage	24 V DC ±10%
Power Consumption	10 W (maximum)
Input Channels	6 x RTD (3-wire, Pt100) or thermocouple (J/K/T)
Input Range	-50°C to +250°C (RTD) / -200°C to +1200°C (TC)
Resolution	16-bit (including sign)
Accuracy	±0.2% of full scale (at 25°C)
Outputs	6 x 4–20 mA (isolated, configurable)
Alarm Relays	4 x Form C (SPDT, 2 A at 30 V DC)
Communication	1 x RS-485 (Modbus RTU)
Cold Junction Compensation	Built-in (software-calibrated)
Status Indicators	6 x LED (Power, OK per channel)
Mounting	Backplane rack
Dimensions (W x H x D)	26 mm x 223 mm x 175 mm
Weight	0.45 kg

Mechanical Design and Rack Integration

This temperature module follows the standard 3300 series rack form factor. Its 26 mm width occupies a single slot in the chassis. The unit weighs 0.45 kilograms and includes a rugged front panel. All signal connectors are front-accessible for convenient wiring.

Power Supply and Electrical Characteristics

The device operates from a 24 V DC supply with a ±10 percent tolerance. It consumes a maximum of 10 watts during full operation. The module includes reverse polarity protection for the supply input. Internal regulation ensures stable performance across varying supply conditions.

Input Configuration and Sensor Compatibility

Six independent channels accept either RTD or thermocouple sensors. The module supports 3-wire Pt100 RTDs for accurate temperature measurement. It also handles J, K, and T type thermocouples for high-temperature applications. The built-in cold junction compensation ensures accurate thermocouple readings. Users can configure each channel individually via software.

Measurement Performance and Accuracy

The 16-bit resolution delivers precise temperature measurements across a wide range. The accuracy reaches ±0.2 percent of full scale at room temperature. RTD inputs cover from -50°C to +250°C for most industrial processes. Thermocouple inputs extend to +1200°C for high-temperature monitoring.

Output and Alarm Capabilities

Six isolated 4–20 mA outputs transmit temperature data to control systems. Users can configure each output with its own scaling and range. Four Form C relays provide alert and danger alarm functions. These relays handle up to 2 amperes at 30 V DC. The module also includes a digital output for overall module status.

Communication and Remote Monitoring

An RS-485 port supports Modbus RTU for remote configuration and data access. This interface allows integration with SCADA and DCS systems. Users can read real-time temperatures and alarm status remotely. The module also logs peak values for historical trend analysis.

Diagnostic Features and Status Indication

Six front-panel LEDs provide immediate channel status visibility. The Power LED confirms correct supply voltage is present. Six OK LEDs indicate normal sensor operation for each channel. A flashing LED signals a sensor fault or out-of-range condition. These diagnostics simplify troubleshooting and system validation.

Application Suitability

This temperature module serves critical machinery across many industries. It works effectively with turbines, compressors, pumps, and generators. The device also monitors bearings, windings, and process fluids. Its operating temperature ranges from -20°C to +65°C.