Bentley 3300/36-02-11-01-00-00 Dual-Channel Temperature Monitoring Module Detailed Product Description

I. Product Overview

The Bentley 3300/36-02-11-01-00-00 is a dual-channel RTD temperature monitoring module within the 3300 series TSI (Turbo Generator Instrumentation) system of Baker Hughes (formerly GE Bentley Nevada), specifically designed for large-scale rotating machinery (such as steam turbines, generators, gas turbines, compressors, etc.) in industries like thermal power, nuclear power, petrochemicals, and metallurgy. The module adopts a 19-inch standard rack structure, supports hot-swapping, and can be mixed with other monitoring modules of the 3300 series to share the backplane - 24V DC power supply and system bus; it is compatible with Pt100 platinum resistors (3-wire system), providing high-precision temperature measurement, dual-level alarm, isolated analog output, and comprehensive self-diagnosis functions, in accordance with API 670 standards. It is the core equipment for thermal protection of rotating machinery.

II. Model Coding Rules (3300/36-AA-BB-CC-DD-EE)

3300: Bentley 3300 modular TSI system, unified rack, centralized power supply, hot-swappable architecture.

36: Function code, representing a dual-channel temperature monitoring module, independently monitoring 2 temperature signals.

02: Range code, corresponding to **0–100℃** measurement range, suitable for medium and low temperature monitoring scenarios of conventional bearings, stators, etc.

11: Sensor type and wiring code, suitable for Pt100 platinum resistors, 3-wire wiring, industrial standard temperature sensor configuration.

01: Relay configuration code, equipped with 2 SPDT relays, corresponding to warning (ALERT) and danger (DANGER) two-level alarms.

00: Certification level code, representing general industrial grade certification, suitable for conventional industrial environments.

00: Safety barrier configuration code, representing no built-in safety barrier, only applicable to non-explosion-proof areas.

III. Core Functions

1. Dual-channel High-Precision Temperature Measurement

Independent 2-channel temperature input, each channel compatible with Pt100 platinum resistors (3-wire system), measurement range 0–100℃, covering normal operation and abnormal temperature intervals of rotating machinery critical parts; high-precision signal conditioning circuit, measurement accuracy ≤ ±0.5% full scale (25℃), resolution up to 0.1℃, capable of accurately capturing minor temperature changes; 3-wire wiring design effectively eliminates cable resistance errors, ensuring long-term measurement stability; real-time monitoring of sensor circuit status, early warning of wire breakage, short circuit, poor contact, etc.

2. Dual-Level Alarm and Relay Output

Each channel independently configures **warning (ALERT) and danger (DANGER)** two-level alarm thresholds, which can be locally configured on the panel or remotely set, suitable for different equipment temperature protection requirements; equipped with 2 epoxy resin-sealed SPDT relays, contact specifications 250V AC/5A, 30V DC/5A, can directly drive audible and visual alarms, DCS/PLC interlock circuits or shutdown protection devices; alarm delay adjustable from 0–10 seconds, filtering instantaneous temperature fluctuations, avoiding false alarms; relay status and module operation status are linked, faults trigger alarms automatically, ensuring timely response to abnormalities.

3. On-site Display and Convenient Configuration

The front panel is equipped with an LCD digital display window and multiple status LED indicators, capable of real-time display of 2 temperature measurement values, sensor circuit resistance, alarm thresholds, and fault codes; OK, ALERT, DANGER, BYPASS - four groups of LED lights, respectively corresponding to normal operation, warning alarm, danger alarm, and module bypass status. The operating status can be clearly seen; it supports on-site configuration via buttons, allowing for range calibration, alarm threshold setting, delay parameter adjustment, sensor type matching, wiring configuration, etc., without the need for an upper computer. The operation is efficient and convenient.

4. Isolation of analog signal output

Provide 2 isolated buffer analog outputs (1 channel per output), configurable to select 4-20mA current signal or 0-10V voltage signal. The output signal is electrically isolated from the power supply and input signal with an intensity of ≥2500V AC, effectively suppressing electromagnetic interference in industrial sites; the output content is the real-time temperature value, which can be connected to recorders, DCS systems or data acquisition platforms, used for temperature trend analysis, fault tracing and data archiving, supporting equipment status assessment and preventive maintenance.

5. Comprehensive self-diagnosis and fault identification

24-hour continuous monitoring of the module's own hardware, sensor circuit, power supply status and signal integrity. It can accurately identify sensor breakage / short circuit, wiring errors, circuit resistance over-limit, power fluctuation, module circuit faults, etc.; distinguish between real temperature anomalies and sensor/circuit faults. The panel LED clearly indicates the fault type, and the local display of fault codes facilitates quick troubleshooting and maintenance, reducing the risk of equipment downtime.

6. System integration and anti-interference capability

Metal shielding shell design, multiple electrical isolation between input, output and power supply circuits, suitable for industrial environments with strong electromagnetic interference such as thermal power, nuclear power, petrochemicals; compatible with 3300 series system bus (Type A), can be connected to the Bentley System 1 equipment status monitoring platform to achieve remote configuration, real-time data transmission, historical trend query, fault warning analysis and other functions, integrated into the enterprise equipment management system; supports seamless connection with DCS, PLC and other third-party systems to meet factory automation integration requirements.

Four. Detailed technical parameters

Measurement parameters

Monitoring channels: 2 independent temperature measurement (compatible with Pt100 platinum resistance)

Sensor type: Pt100 platinum resistance (3-wire system, 0.00385 temperature coefficient)

Measurement range: 0–100℃

Measurement accuracy: ≤±0.5% of full scale (25℃, typical value)

Resolution: 0.1℃

Input impedance: ≥1MΩ (per channel)

Loop resistance: ≤50Ω (3-wire system, single cable)

Electrical parameters

Operating power supply: -24V DC (±10%), backplane power supply; supports short-circuit switching - 18V DC

Power consumption: typical 1.5W, maximum ≤3W

Relay output: 2 SPDT (ALERT+DANGER), 250V AC/5A, 30V DC/5A

Analog output: 2 isolated, 4-20mA or 0-10V selectable

Isolation strength: ≥2500V AC between input/output/power supply

Sensor power supply: constant current excitation, suitable for Pt100 measurement requirements

Environmental and mechanical parameters

Operating temperature: 0℃~+65℃ (standard industrial grade)

Storage temperature: -40℃~+85℃

Relative humidity: 5%–95% (no condensation)

Installation method: 19-inch standard rack slot, supports hot swapping

Dimensions: 203mm (height) × 330mm (depth) × 51mm (width)

Weight: approximately 1kg

Protection level: IP20 (suitable for installation in control cabinets)

Certification and compliance

Industry standards: Compliant with API 670 Rotating Machinery Monitoring and Protection Standards Electromagnetic Compatibility: CE Certification, in accordance with EN 61000-6-2/4

Safety Certification: UL Certification

Environmental Compliance: RoHS Directive Compliance

V. Typical Application Scenarios

Power Industry (Thermal Power / Nuclear Power Turbines / Generators): Monitoring bearing temperatures, stator winding temperatures, core temperatures, preventing overheating that leads to bearing burnout, insulation aging, and equipment damage; Temperature protection throughout the phases of startup acceleration, normal operation, and shutdown rotation, triggering alarms or interlocks upon exceeding temperature limits.

Petrochemical Industry (Large-scale Process Compressors / Turbines): Monitoring sliding bearing temperatures, sealing chamber temperatures, suitable for high-temperature, high-pressure, and highly corrosive industrial environments, preventing overheating that causes bearing wear, seal failure, and medium leakage, ensuring continuous production.

Metallurgical Industry (Large-scale Transmission Turbines / Generator Sets): Monitoring critical bearings and equipment shell temperatures, dual-level alarm linkage with equipment operation interlocks, timely warning of overheating faults, reducing unplanned downtime risks, ensuring stable operation of the metallurgical process.

VI. Installation and Commissioning Specifications

Installation Requirements

Frame Installation: Smoothly push into the vacant slot of the 3300 series frame, ensure that the rear connectors are fully engaged, tighten the panel fixing screws to avoid loosening and contact failure.

Sensor Wiring: Pt100 platinum resistors are wired according to the module terminal markings in 3-wire system, select high-temperature-resistant shielded cables, single-ended grounding of the shielding layer (on the control cabinet side), to avoid circulating interference; During wiring, distinguish between power lines and signal lines to prevent incorrect connections and damage to the sensor or module.

Alarm and Output Wiring: Distinguish between ALERT and DANGER relay contacts, connect to the alarm/interlock circuit; Analog output terminals are wired according to the requirements of DCS/recorders, confirm the correct signal polarity.

Sensor Installation: Pt100 probes are tightly attached to the surface of the measured equipment (bearing seat, stator core, etc.), fixed with conductive glue to ensure accurate temperature measurement; The probe cable is firmly fixed to avoid vibration wear or broken wires.

Commissioning Steps

Power-on Self-Test: After module power-on, it automatically performs self-check, the OK light is constantly on indicating normal hardware, when the fault light is on, troubleshoot the wiring or hardware issues.

Sensor Calibration: Enter calibration mode through the panel buttons, select Pt100 sensor type, 3-wire wiring, calibrate the resistance and temperature relationship of the calibration circuit, ensure measurement accuracy.

Alarm Settings: According to the equipment operation standards, set warning thresholds (such as 80°C) and danger thresholds (such as 95°C), adjust alarm delay (such as 2 seconds), save parameters.

Signal Verification: During equipment operation, observe whether the 2-channel temperature values on the panel are stable, without jumps, drifts; Check the resistance of the sensor circuit, confirm the signal is correct, then put it into operation.

VII. Maintenance and Fault Troubleshooting

Daily Maintenance

Regular Inspection: Daily observation of panel temperature values, circuit resistance, and LED status, confirming no alarms or fault prompts; Check that the module terminal connections are not loose or oxidized, and the frame ventilation and heat dissipation are good.

Annual Calibration: Use a standard temperature source to calibrate temperature measurement accuracy, verify the alarm action values and delay accuracy of relays, ensure reliable monitoring and protection functions.

Cleaning and Protection: Regularly clean the module surface dust with a dry soft cloth to avoid dust accumulation affecting heat dissipation; Strictly prohibit liquids and metal debris from entering the module interior.

Common Fault Troubleshooting

OK Light Goes Out (Module Failure): Check if the backplane power supply is normal (-24V DC), reinsert and re-execute the module, still abnormal then replace the module.

Temperature Display Abnormality (Jumps / Drifts): Check if the Pt100 sensor wiring is loose or disconnected, if the circuit resistance is over-limit, re-wire or replace the sensor; Check if the environmental temperature is beyond the working range and if there is strong electromagnetic interference. No temperature display: Check if the sensor is damaged, if the wiring is incorrect (3-wire connection error), if the module sensor excitation output is normal, and troubleshoot and replace faulty components.

Alarm mis-triggering: Re-calibrate the alarm threshold and delay parameters, check if the temperature signal is interfered with, and optimize the sensor installation and wiring shielding measures.

VIII. Usage Notes

This model is of non-explosion-proof design. Installation and use are strictly prohibited in flammable and explosive hazardous areas.

It must be paired with **Pt100 platinum resistance (3-wire system)** temperature sensor. Other types of sensors (such as thermocouples, Cu50) must not be mixed. Otherwise, it will cause measurement errors or equipment damage.

It is only applicable for routine industrial environment temperature monitoring of 0–100℃. For over-temperature scenarios, select the corresponding range module.

Do not disassemble the module, modify the internal circuitry, or replace non-original accessories on your own. Illegal operations will result in the invalidation of equipment warranty and may also cause safety hazards.

Before connecting or inspecting the module, the main power supply of the frame must be cut off to prevent short circuits and electric shock accidents; do not plug or unplug the module while it is powered on.

When the module is out of service for a long time, it is recommended to remove it from the frame, store it in a dry and cool environment to avoid moisture and dust affecting performance.