Description
Bently 3500/61 | Part Number:133811‑02
Technical Specifications:
- Channel Quantity:6 temperature input channels, 6 channels of 4‑20mA recorder output
- Supported Sensors:3‑wire /4‑wire RTD, multiple standard thermocouple types
- Power Consumption:9 Watts nominal
- Operating Temperature:0°C ~ +60°C
- Storage Temperature:‑40°C ~ +85°C
- Rack Slot Occupation:2 slots
- Certifications:SIL2, CE, UL, compliant with API670 standard Functional Features:
- Six‑channel temperature acquisition, each channel independent 4‑20mA recorder analog output
- Supports absolute temperature and differential‑temperature calculation
- Per‑channel programmable high‑alarm and danger‑alarm thresholds
- Sensor open‑circuit and short‑circuit fault diagnosis
- Channel bypass function for maintenance work
- Alarm events can drive 3500 series relay modules for protection interlock Application Scenarios:
- Turbine, compressor bearing temperature monitoring for general power plant and petrochemical site without severe ground‑loop interference
- Equipment needing temperature data output to external DCS system Performance Parameters:
- Measurement Accuracy: ±0.5% full scale
- Recorder Output Accuracy: ±0.2% full scale
- Response Time: Less than 1 second
- RTD Measuring Range:‑200°C ~ +850°C
- Thermocouple Measuring Range:‑100°C ~ +1370°C Material Composition:
- Front panel: Oxidation‑treated aluminum alloy
- Main circuit board: FR‑4 fire‑retardant printed circuit board
- Internal termination assembly 133811‑02: FR‑4 PCB with gold‑plated screw terminals
- Shield housing: Cold‑rolled steel anti‑EMI shell
- Backplane bus connector: Gold‑plated industrial connector Structural Characteristics:
- Two‑slot plug‑in main module for 3500 rack
- Front panel multi‑LED status indicator lamps
- Rear‑side internal termination assembly 133811‑02, field sensor cables connect directly to rear‑side screw terminals
- Mechanical locking screws for rack mounting Working Principle: Field RTD or thermocouple sensor signals are connected directly to rear internal termination assembly 133811‑02. After signal conditioning and analog‑digital conversion, real‑time temperature value is obtained. Microcontroller compares measured value with alarm setpoints. Digital data transmits to rack backplane bus, meanwhile each channel converts temperature value into 4‑20mA analog recorder output signal for external system. Alarm condition triggers relay action request through system backplane bus. Installation Requirements:
- Install module into two adjacent slots inside 3500 instrument rack, power‑off rack before plug‑in or pull‑out, non‑hot‑swap
- Field sensor cables connect directly to rear‑side terminals of 133811‑02 assembly
- Adopt shielded twisted‑pair cable, shield layer single‑end grounding inside cabinet
- Separate sensor signal wiring from high‑voltage power cable
- Keep adequate ventilation gap for heat dissipation Usage Notes:
- Configure sensor type and alarm parameters in official 3500 configuration software before commissioning
- This non‑isolated I/O assembly 133811‑02 is not suitable for site with heavy ground‑loop interference
- Inspect rear‑side terminal screw tightness periodically
- Prevent dust and moisture from invading rear‑side termination area
- Perform full‑loop calibration including field sensors during annual maintenance cycle
