Description
Honeywell 51304913-100
Technical Specifications
- Channel Count: 8 independent RTD input channels
- Supported Sensor Type: PT100 platinum resistance thermometer, 3-wire connection
- Backplane Interface: TDC3000 proprietary backplane bus
- Power Supply: 5VDC and 12VDC from rack backplane
- Operating Ambient Temperature: 0°C to +60°C
- Storage Temperature: -40°C to +85°C
- Relative Humidity: 5% to 90% RH non-condensing
- Mounting Type: Plug-in slot installation on TDC3000 control rack
- Certification: UL, CE, RoHS
- Temperature Measurement Range: -200°C to +850°C
Functional Features It cyclically excites and samples each RTD channel with constant current source. It executes automatic 3-wire lead resistance compensation to reduce wiring error. It converts resistance value into standard temperature value according to ITS-90 standard. It supports configurable temperature filtering and alarm threshold setting. It detects sensor open circuit, short circuit and wire breakage fault. It uploads raw resistance value and converted temperature value to TDC3000 main processor. It carries front panel LED indicators for power, run status and channel fault. It supports hot swap replacement under redundant rack configuration. It stores sensor type and calibration parameters in non-volatile memory. It supports single-channel calibration operation from engineering workstation.
Application Scenarios Petrochemical plant reactor temperature monitoring rack Refinery furnace and heat exchanger temperature signal cabinet Chemical plant distillation column temperature measurement rack Power plant boiler superheater and water wall temperature monitoring Natural gas plant pipeline and compressor temperature collection
Performance Parameters
- ADC Resolution: 16-bit
- Temperature Accuracy: ±0.1°C within 0°C to 200°C range
- Mean Time Between Failures: 800000 hours
- Channel Isolation Rating: 1500VAC between field channel and internal logic circuit
- ESD Immunity: 8kV contact discharge
- Sampling Period: Configurable from 50ms to 1000ms
Material Composition FR4 flame retardant conformal coated multilayer PCB Constant current excitation source circuit array 16-bit ADC conversion chip Precision reference resistance network Optocoupler isolation components TVS surge suppression diodes Backplane bus transceiver chip Gold plated edge connector for TDC3000 backplane Metal front panel with extraction handle and LED indicators Removable plastic terminal block for RTD sensor wiring
Structural Features Standard TDC3000 paddle card form factor. Front panel integrates removable field wiring terminal block and grouped LED indicators plus extraction handle. Rear gold plated edge connector mates with rack backplane power and control bus. Each RTD channel adopts independent constant current excitation and isolation circuit. Anti-key notch prevents reverse insertion into rack slot. Locking clip secures module firmly after installation. Internal PCB layout separates high-precision resistance sampling circuit and digital bus circuit to reduce thermal drift and noise interference. Conformal coating fully covers PCB surface to resist dust, moisture and corrosive gas.
Working Principle Constant current source sends stable excitation current to 3-wire PT100 sensor. Sampling circuit measures voltage drop across RTD and lead wires. Compensation logic calculates and eliminates resistance error introduced by connecting wires. ADC chip converts analog voltage signal into digital resistance value. On-board logic chip converts resistance value into temperature value according to PT100 resistance-temperature curve. Processed temperature data is packaged and transmitted to TDC3000 main processor via backplane bus. Diagnostic circuit monitors excitation current and signal amplitude. If sensor open circuit or short circuit is detected, fault flag generates and alarm uploads to operator station.
Installation Requirements Wear anti-static wrist strap before inserting module into vacant rack slot. Lock extraction handle after full seating. Connect 3-wire shielded twisted pair cable from PT100 sensor to corresponding channel terminals. Configure sensor type, temperature range and filter parameter in engineering software. Power on rack and verify run LED steady on. Perform channel calibration with standard resistance box before commissioning. Separate RTD signal cable from high voltage power cable in wiring duct.
Usage Notes Use 3-wire connection strictly for PT100 sensors to guarantee compensation effect. Do not apply external voltage to RTD input terminals. Keep shield wire single point grounding at marshalling cabinet side. Check terminal screw tightness periodically under vibration environment. Recalibrate each channel every 12 months. Replace module when multiple channels show abnormal temperature reading.
