Emerson KJ3002X1-BF1

Emerson KJ3002X1-BF1

Product Introduction:
The Emerson KJ3002X1-BF1 is an 8-channel analog input module within the Emerson DeltaV distributed control system. It acquires 4-20 mA current loop signals from field transmitters and converts them into digital process variables for the DeltaV controller. The module supports HART (Highway Addressable Remote Transducer) communication, enabling bidirectional digital communication with smart field instruments for configuration, diagnostics, and additional variable access beyond the primary 4-20 mA signal.

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Description

Emerson KJ3002X1-BF1

Technical Specifications:

  • Brand: Emerson
  • Model Number: KJ3002X1-BF1
  • Alternate Part Numbers: 12P1732X082, VE4003S6B1
  • Product Type: Analog Input Module
  • System Platform: Emerson DeltaV DCS
  • Analog Input Channels: 8
  • Signal Range: 4-20 mA current loop
  • HART Compatibility: Yes
  • Communication Interface: DeltaV LocalBus
  • Operating Voltage: 24 VDC
  • LocalBus Power Rating: 12 VDC at 150 mA
  • Bussed Field Power Rating: 24 VDC at 300 mA
  • Field Circuit Rating: 24 VDC at 32 mA
  • Sampling Frequency: 50 kHz
  • Operating Temperature: -40°C to +85°C (some sources indicate 0°C to +60°C for standard cabinet environments)
  • Relative Humidity: 5% to 95% (non-condensing)
  • Dimensions: 100 mm × 60 mm × 30 mm (module only)
  • Weight: 0.2 kg
  • Certifications: UL, CE, ISO 9001
  • Terminal Block Key Position: A1

Functional Features:

  • 8-Channel 4-20 mA Input: Simultaneously acquires analog signals from up to eight field transmitters
  • HART Communication: Supports HART protocol for bidirectional digital communication with smart transmitters, enabling remote configuration, diagnostics, and access to secondary process variables
  • High-Speed Sampling: 50 kHz sampling frequency ensures real-time data acquisition without compromising precision
  • DeltaV LocalBus Integration: Communicates efficiently with the DeltaV controller through the proprietary LocalBus protocol
  • Built-In Protection: Designed with protection against environmental hazards including dust, moisture, and electromagnetic interference
  • Compact Form Factor: Small physical size allows high channel density in the control cabinet

Application Scenarios:

  • Process variable monitoring (pressure, temperature, flow, level) in chemical plants
  • Pipeline monitoring in oil and gas production facilities
  • Utility system monitoring (steam, water, air) in power generation
  • Batch process control in pharmaceutical manufacturing
  • Environmental monitoring systems (emissions, effluent)
  • Any DeltaV installation requiring multi-channel 4-20 mA analog input with HART diagnostics

Material Composition:

  • Aluminum alloy housing
  • Multi-layer PCB with analog signal conditioning and HART communication circuitry
  • Industrial-grade electronic components rated for harsh environments

Structural Features:

  • Compact modular form factor (100 mm × 60 mm × 30 mm)
  • Backplane connector for DeltaV LocalBus communication
  • Terminal block interface for field wiring (via compatible terminal block)
  • Status indicator LEDs for power and channel diagnostics
  • Rotary keying system for terminal block compatibility

Working Principle:
The KJ3002X1-BF1 receives 4-20 mA current loop signals from field transmitters through its input channels. Each channel conditions the analog signal, performs analog-to-digital conversion, and transmits the digitized process variable to the DeltaV controller via the LocalBus. When HART-enabled transmitters are connected, the module superimposes digital HART communication on the 4-20 mA signal, enabling bidirectional data exchange for remote configuration, diagnostics, and access to additional process variables stored in the smart transmitter.

Installation Requirements:

  • Install on the appropriate DeltaV I/O carrier with a compatible terminal block
  • Set the terminal block key position to A1 to match the I/O card
  • Connect field wiring to the terminal block following the wiring diagram on the left side of the card
  • Ensure LocalBus power (12 VDC at 150 mA) and bussed field power (24 VDC at 300 mA) are available from the carrier
  • Maintain operating temperature within specified range
  • Follow Emerson installation documentation for hazardous area requirements

Usage Precautions:

  • Remove field power before removing or connecting the device
  • Only one unit at a time shall be removed with system power energized
  • The unit contains no user-serviceable parts and shall not be disassembled
  • Calibration is not required for this module
  • Verify HART compatibility of connected field instruments before configuration
  • Perform periodic I/O loop assessments to verify signal integrity

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