Description
Emerson KJ3223X1‑BA1
Technical Specifications
- LocalBus Power Supply: 12 VDC, 330 mA
- Input Signal: 4‑20 mA two‑wire transmitter input, HART protocol compatible
- Channel Quantity: 8 channels
- Loop‑supply Voltage: compliant with HART two‑wire transmitter power requirement
- Operating Temperature: ‑40 °C ~ +70 °C
- Storage Temperature: ‑50 °C ~ +85 °C
- Relative Humidity: 5 %‑95 %, non‑condensing
- Contaminant Grade: ISA‑S71.04‑1985 Class G3
- Protection Rating: IP20
- Shock Resistance: 10 g half‑sine pulse 11 ms duration
- Vibration Resistance: 1 mm peak‑to‑peak 2‑13.2 Hz; 0.7 g 13.2‑150 Hz
- Rotary mechanical keying for matched terminal‑block assembly.
Functional Features 8‑channel analog input for two‑wire 4‑20 mA HART field transmitters. On‑board loop‑supply power for each connected two‑wire field instrument. Integrated HART modem realizes bidirectional digital communication with HART smart devices. Per‑channel diagnostics detect loop open‑circuit, short‑circuit and transmitter fault status. Front‑panel LED indicator array visualizes module running, channel status and fault alarms. DeltaV asset management supports hardware identification and version reading. Mechanical anti‑mismatch rotary keying prevents incompatible terminal‑block installation. High‑precision analog‑to‑digital conversion ensures measurement accuracy across working temperature range.
Application Scenarios Petrochemical complex, refinery, chemical plant and power‑generation auxiliary control system. Used for pressure, flow rate, liquid‑level and temperature measurement loops adopting HART‑capable two‑wire transmitters. Supports remote instrument parameter read‑back and diagnostic information acquisition.
Performance Parameters Analog measurement accuracy maintains stable under full operating‑temperature range. HART digital communication works reliably under industrial electromagnetic‑noise environment. Channel‑level fault diagnostic messages report to DeltaV HMI in real‑time. Supports long‑term 7×24‑hour continuous industrial‑site running.
Material Composition Metal reinforced front‑panel assembly. Glass‑epoxy multilayer high‑density printed circuit board. Gold‑plated edge contacts for carrier backplane LocalBus connection. High‑precision analog‑to‑digital conversion chips, HART modem integrated circuits, isolation and power‑supply semiconductors. Flame‑retardant engineering‑plastic outer housing.
Structural Characteristics Plug‑in modular hardware for DeltaV Series 2 I/O carrier‑rack installation. Front‑panel LED indicator group shows module health and channel‑wise status. Rear gold‑plated edge connector mates with carrier‑rack backplane LocalBus bus. Side‑mounted mechanical locking latch fixes module firmly into rack slot. Passive convection cooling gaps distributed on module housing surface.
Working Principle Two‑wire HART field transmitters receive loop‑supply power provided by KJ3223X1‑BA1 card through matched terminal‑block wiring. 4‑20 mA analog process signal plus superimposed HART digital signal transmits to analog input channel. On‑board analog‑to‑digital converter transforms current signal into digital process variable for DeltaV controller. Built‑in HART modem demodulates and modulates digital HART data for two‑way communication with field smart instruments. Per‑channel monitoring circuit samples loop electrical parameter continuously. When open‑circuit or short‑circuit fault occurs, diagnostic alarm messages are uploaded to DeltaV controller via LocalBus backplane.
Installation Requirements Install module in designated slot position of DeltaV Series 2 I/O carrier rack. Use rotary‑key matched HART analog‑input terminal‑block accessories. Field instrument cables adopt HART‑compliant shielded twisted‑pair wiring. Signal cables must keep physical separation layout away from high‑power motor cables. Cabinet protective‑grounding resistance shall stay below 4 Ohm. De‑energize LocalBus power and field‑loop power before inserting or removing module hardware. Complete all field‑transmitter wiring work before connecting I/O card and terminal‑block unit.
Usage Precautions Total loop impedance shall satisfy HART physical‑layer specification requirement. Do not exceed maximum allowable field‑loop load parameter for each channel. Maintain cabinet ventilation passage unobstructed to prevent component overheating. Periodically inspect terminal screw fastening torque in maintenance cycle. Strictly follow DeltaV Zone 2 installation instruction for hazardous classified‑zone application. Never disassemble module housing, no user‑serviceable internal components.
