Description
Honeywell 51196694-250
Technical Specifications
- Channel Count: 8 independent analog input channels
- Input Signal Type: 4-20mA DC
- Backplane Interface: TDC3000 proprietary backplane bus
- Power Supply: 5VDC and 24VDC 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
- Input Impedance: 250Ω per channel
Functional Features It cyclically samples all 8 analog input channels at configurable interval. It executes digital filtering to suppress high-frequency noise from field wiring. It supports square root calculation function for differential pressure flow measurement points. It detects open circuit, short circuit and over-range fault for each channel. It carries built-in surge suppression and channel-to-channel isolation circuit. It uploads raw measurement value, scaled engineering value and channel fault status 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 channel calibration coefficient and scaling parameters in non-volatile memory. It supports single-channel calibration operation from TDC3000 engineering workstation.
Application Scenarios Petrochemical plant flow and pressure signal acquisition rack Refinery furnace process variable measurement cabinet Chemical reactor continuous analog signal collection Power plant boiler drum level and steam pressure monitoring rack Natural gas pipeline pressure and flow transmitter signal input
Performance Parameters
- ADC Resolution: 16-bit
- Input Accuracy: ±0.08% full scale
- Mean Time Between Failures: 840000 hours
- Channel Isolation Rating: 1500VAC between field channel and internal logic circuit
- ESD Immunity: 8kV contact discharge
- Sampling Period: Configurable from 20ms to 1000ms
Material Composition FR4 flame retardant conformal coated multilayer PCB 16-bit ADC conversion chip array Precision sampling resistor 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 field transmitter 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. Every analog input channel adopts independent isolation barrier to eliminate cross-channel interference. Anti-key notch prevents reverse insertion into rack slot. Locking clip secures module firmly after installation. Internal PCB layout separates high-precision analog sampling circuit and digital backplane bus circuit to reduce electrical noise coupling. Conformal coating fully covers PCB surface to resist dust, moisture and corrosive gas in industrial cabinet environment.
Working Principle Field 4-20mA current signal passes through sampling resistor and converts into voltage signal. ADC chip converts analog voltage signal into digital value. Digital filtering circuit eliminates transient noise interference. On-board logic chip executes scaling and square root calculation according to pre-configured parameters. Processed digital data is packaged and transmitted to main processor via backplane bus. Diagnostic circuit continuously monitors each channel signal amplitude. If signal falls below 3.8mA or rises above 20.5mA, fault flag generates and alarm message 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 shielded twisted pair cable from field transmitters to corresponding channel terminals. Configure channel scaling, filter coefficient and square root enable parameter in engineering software. Power on rack and verify run LED steady on. Perform channel calibration with standard current signal source before commissioning. Separate analog input cable from high voltage power cable in wiring duct.
Usage Notes Do not apply voltage higher than 30VDC directly to 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 consistent reading drift exceeding specification.
