1. Overview

2. Parameters

Signal Input:

• RTD Channels: 6 channels, supporting 2-wire, 3-wire, and 4-wire configurations, with a measurement range typically from -200°C to +650°C.
• TC Channels: 6 channels, supporting J, K, E, T, R, S, B, and N type thermocouples, with a measurement range typically from -200°C to +1800°C.
• Resolution: 16-bit A/D converter (0.0015% FS).
• Communication Interface: RS485/RS422 or 100Base-TX, Ethernet transmission (depending on system configuration).
• Supply Voltage: 24 V DC (powered by the 3500 system rack).
• Environmental Adaptability: Operating temperature range from -40°C to +70°C, with protection level complying with industrial standards.
• Electromagnetic Compatibility: Complies with IEC/EN 61000 standards, with electromagnetic interference resistance.

3. Product Features

• High-Precision Temperature Monitoring: Adopts a high-precision voltage divider circuit to ensure accurate collection of RTD and TC signals.
• Flexible Alarm Function: Supports programming of temperature thresholds, enabling setting of high/low temperature alarms, warnings, and shutdown points.
• Powerful Diagnostic Function: Capable of detecting faults such as open circuits, short circuits, and signal drift, ensuring the reliability of the monitoring system.
• Modular Design: Standardized 3500 rack structure, supporting quick plug-in and expansion.
• Compliance with Industry Standards: Meets API 670 vibration monitoring and protection standards.

4. Structure and Composition

• Module Body: Metal housing providing EMI shielding, installed in the 3500 rack.
• Input Terminal Block: Shielded input terminal block, divided into RTD and TC types, with convenient wiring.
• Internal PCB: Integrates analog front-end, A/D converter, microprocessor, and communication interface chip.
• Indicator Lights: Status indicator lights for displaying module power supply status and fault status.

5. Application Fields

• Oil and Gas: Monitoring bearing temperature and oil temperature of key equipment such as pumps, compressors, and heat exchangers.
• Power Generation Industry: Monitoring bearing and oil temperature of steam turbines and generator sets to prevent equipment failure caused by overheating.
• Chemical and Metallurgical Industry: Monitoring the temperature of reactors, condensers, and other high-temperature equipment.
• Transportation: Monitoring the temperature of engines, gearboxes, and axles.
• Water Treatment: Monitoring temperature changes of pump stations and filter presses.

6. Installation and Maintenance

Installation Guidelines:

• Rack Installation: Slide the module into the standard 19-inch slot of the 3500 series rack, ensuring the rack power is disconnected.
• Wiring: According to the RTD or TC type, correctly connect the sensor to the corresponding input terminal block, ensuring correct polarity (for TC) or lead sequence (for RTD).

Maintenance Recommendations:

• Regular Calibration: It is recommended to perform on-site calibration of RTD/TC sensors and modules every 1-2 years to ensure measurement accuracy.
• Fault Diagnosis: Use Bently Nevada upper computer software to monitor the self-test status and alarm logs of the module, and promptly handle open circuits, short circuits, or signal drift issues.
• Cleaning and Protection: Keep the module housing clean to avoid poor heat dissipation caused by dust accumulation, and ensure the ambient temperature and humidity are within the rated range.