Description
Honeywell MC-TAMT04
Technical Specifications
- Channel Quantity: 16 isolated thermocouple input channels
- Supported Thermocouple Types: J, K, T, E, R, S, B, N
- Input Signal Range: -10mV to +80mV
- Cold Junction Compensation: On-board precision cold junction sensor
- Communication Interface: Redundant ControlNet bus
- Analog Resolution: 16-bit ADC sampling
- Working Ambient Temperature: 0°C to +60°C
- Storage Temperature: -40°C to +85°C
- Relative Humidity: 5% to 90% RH non-condensing
- Channel Isolation Rating: 500VAC between channel and logic ground
- Mounting Method: Plug-in slot installation on CIOM-A chassis
- Certification: UL, CE, TÜV, RoHS
Functional Features Each channel supports independent thermocouple type configuration via engineering workstation. It provides configurable open thermocouple detection alarm. It continuously uploads real temperature value and channel diagnostic status to the Experion PKS controller. It supports hot swap replacement without powering down the whole CIOM chassis. It has tri-color LED indicators for power, module fault and each channel status. It filters high-frequency noise interference from millivolt weak signals. It supports group scanning and single-channel reading mode. It retains configuration parameters after power loss.
Application Scenarios Furnace and reactor thermocouple temperature monitoring in petrochemical plants Power plant boiler tube skin temperature measurement Heat exchanger and distillation column temperature point collection Metallurgical furnace multi-point temperature monitoring Pharmaceutical batch reactor temperature control loop Experion PKS DCS thermocouple I/O spare replacement
Performance Parameters
- Temperature Measurement Accuracy: ±0.1°C after cold junction compensation
- Channel Scan Interval: 1 second for full 16-channel scan
- Insulation Resistance: Greater than 1000 MΩ
- Mean Time Between Failures: 860000 hours
- ESD Immunity: 8kV contact discharge
- Maximum Wire Length: 300 meters for thermocouple extension wire
Material Composition FR4 flame retardant multilayer PCB with conformal acrylic coating 16-bit analog-to-digital conversion chip array Precision platinum cold junction temperature sensor High-speed optocoupler isolation components TVS surge suppression diodes for millivolt signal protection Metal film reference resistors ABS flame retardant front panel Tri-color LED status indicators Gold plated edge connector and metal locking buckle
Structural Features Standard CIOM-A plug-in module form factor. Front panel integrates status LED indicators and extraction handle. Rear gold finger connector mates with chassis backplane and redundant ControlNet bus. Internal PCB layout separates weak millivolt signal sampling zone and digital communication zone to reduce electromagnetic crosstalk. Isolation barrier separates field thermocouple wiring side and internal logic circuit. Locking clip fixes the module firmly in chassis slot. Anti-key notch prevents reverse insertion into the slot.
Working Principle Thermocouple generates millivolt voltage signal proportional to temperature difference between measuring junction and cold junction. The on-board cold junction sensor measures internal PCB temperature and compensates the raw millivolt value. ADC chip converts compensated analog signal into digital temperature value. The module logic chip packages temperature data and diagnostic information, then transmits data to Experion PKS controller through ControlNet bus. When thermocouple wire breaks, the module triggers open circuit fault flag and uploads alarm message.
Installation Requirements Wear anti-static wrist strap before inserting MC-TAMT04 module into vacant CIOM-A slot. Lock the module buckle after alignment. Use dedicated thermocouple extension wire to connect field sensors to matched terminal assembly. Configure thermocouple type and alarm threshold in Experion PKS engineering software. Power on the chassis and verify temperature reading consistency with local instrument display. Separate thermocouple signal cables from high-power AC cables in wiring duct.
Usage Notes Do not use ordinary copper wire to replace thermocouple extension wire. Keep the module cabinet temperature stable to reduce cold junction compensation drift. Do not apply AC voltage to any input terminal. Check the conformal coating condition regularly for humid coastal or chemical plant environments. Confirm channel configuration matches the actual thermocouple type before commissioning.
