Description
Emerson KJ3002X1-BG2
Technical Specifications:
- Brand: Emerson
- Model Number: KJ3002X1-BG2
- Product Type: 8-Channel Thermocouple Analog Input Card / Power Module
- System Platform: Emerson DeltaV DCS
- Number of Channels: 8 thermocouple input channels
- Hazardous Area Rating: II 3G Ex nA nC IIC Gc
- Nemko Certification: 07ATEX3058U
- Input Voltage: 12 VDC
- Output Ratings: 12 VDC at 14.8 A; 24 VDC at 6.1 A; 12 VDC at 13 A (12 VDC input); 12 VDC at 8 A (24 VDC input); 5.1 VDC at 2.0 A; 3.4 VDC at 2.0 A
- Auxiliary Output Power: 10.2 W (+5.1 VDC and +3.4 VDC combined)
- Operating Temperature: -40°C to +70°C
- Shock Rating: 10g half-sine wave for 11 milliseconds
- Vibration Rating: 1 mm peak-to-peak from 2 to 13.2 Hz; 0.7g from 13.2 to 150 Hz
- Airborne Contaminants: ISA-S71.04-1985 Class G3
- Relative Humidity: 5% to 95% non-condensing
Functional Features:
- 8-Channel Thermocouple Input: Accepts signals from eight thermocouple sensors simultaneously for comprehensive temperature monitoring
- Multiple Power Outputs: Provides regulated 12 VDC, 24 VDC, 5.1 VDC, and 3.4 VDC power outputs for system components
- Hazardous Area Certification: ATEX certified for Zone 2 hazardous environments (II 3G Ex nA nC IIC Gc)
- Wide Operating Temperature: Functions across -40°C to +70°C range for deployment in extreme environments
- Robust Mechanical Rating: Withstands 10g shock and significant vibration levels for industrial environments
Application Scenarios:
- Temperature monitoring in chemical processing plants
- Petroleum refinery temperature measurement systems
- Power plant thermal monitoring
- Aerospace and defense testing environments
- Any DeltaV DCS application requiring multi-point thermocouple temperature acquisition
- Hazardous area installations requiring ATEX Zone 2 certification
Material Composition:
- Industrial-grade electronic components
- Multi-layer PCB with thermocouple signal conditioning and power regulation circuitry
- Robust modular housing suitable for hazardous area installation
Structural Features:
- Standard DeltaV card form factor for carrier mounting
- 8 thermocouple input terminal connections
- Power output terminals for system power distribution
- Backplane connector for integration with DeltaV carrier
- Product label with serial number, manufacturing location, and date
Working Principle:
The KJ3002X1-BG2 receives millivolt-level thermoelectric signals from eight thermocouple sensors through its input channels. Each channel includes signal conditioning circuitry that amplifies the weak thermocouple signal, applies cold junction compensation, and converts the conditioned analog signal into a digital temperature value. These digital values are transmitted to the DeltaV controller via the carrier backplane. The power supply section simultaneously converts the 12 VDC input into multiple regulated output voltages to power other system components.
Installation Requirements:
- Install the card into a compatible DeltaV I/O carrier slot
- Connect thermocouple sensor wires to the appropriate channel terminals using correct polarity
- Connect the 12 VDC power input to the designated power terminals
- Refer to document 12P2046 “DeltaV Scalable Process System Zone 2 Installation Instructions” for hazardous area installations
- Ensure the operating environment does not exceed the specified temperature, humidity, vibration, and shock limits
Usage Precautions:
- Do not remove or insert this unit while system power is energized
- The unit contains no user-serviceable parts and must not be disassembled for any reason
- No calibration is required for this module
- Verify thermocouple type configuration matches the connected sensors
- Ensure proper grounding and shielding of thermocouple wiring to minimize noise
- Confirm the hazardous area classification of the installation location matches the module’s ATEX rating
