Emerson KJ3221X1-BA2 Analog Input Module – Product Description

Overview

The Emerson KJ3221X1-BA2 is a high-performance Analog Input (AI) Module for the DeltaV™ distributed control system (DCS). It provides 16 galvanically isolated channels for connecting field instruments such as transmitters and sensors. Moreover, it converts analog signals into precise digital values for DeltaV controllers, ensuring reliable and accurate process monitoring. The module is designed for hazardous area compliance (Zone 2 / Class I Div. 2) and supports continuous operation in demanding industrial environments.

Technical Specifications

• Model: KJ3221X1-BA2

• Type: Analog Input Module

• System Compatibility: Emerson DeltaV DCS

• Number of Channels: 16 isolated analog inputs

• Signal Range: 4–20 mA current input

• Resolution: 16-bit analog-to-digital conversion

• HART Support: Pass-through, point-to-point only

• LocalBus Power Rating: 12 VDC at 150 mA

• Bussed Field Power Rating: 12 VDC at 300 mA

• Field Circuit Rating: 24 VDC at 32 mA

• Dimensions (H × W × D): ~51 × 102 × 102 mm

• Weight: 0.18–0.20 kg

• Operating Temperature: –40 °C to +70 °C

• Storage Temperature: –40 °C to +85 °C

• Humidity Range: 5% – 95% non-condensing

• Shock Resistance: 10 g half-sine wave for 11 ms

• Vibration Resistance: 1 mm peak-to-peak (2–13.2 Hz), 0.7 g (13.2–150 Hz)

• Airborne Contaminants: ISA‑S71.04 Class G3

• Protection Class: IP20

• Certifications: CE, UL, ATEX, IECEx (Zone 2 / Class I Div. 2)

• Country of Origin: USA

FAQ 

Q1: How many channels does the KJ3221X1-BA2 module provide?
A1: The module provides 16 isolated analog input channels for field instruments.

Q2: Does the module support HART communication?
A2: Yes, it supports point-to-point HART pass-through for diagnostics and configuration.

Q3: Is this module suitable for hazardous areas?
A3: Yes, it is certified for Zone 2 / Class I Div. 2 hazardous areas.

Q4: What type of signals can it measure?
A4: The module measures standard 4–20 mA current input signals from transmitters.

Q5: Can it operate in extreme temperatures?
A5: Yes, it functions reliably between –40 °C and +70 °C operating temperature.

Q6: Which industries commonly use this module?
A6: Oil & gas, chemical plants, power generation, steel mills, and industrial automation systems.