Emerson KL3021X1-BA1 | DeltaV CHARM Analog Input Module

Product Description

The KL3021X1-BA1 CHARM module from Emerson is a field-mounted analog input interface designed for DeltaV distributed control systems. It supports standard 4–20 mA signals with integrated HART communication, enabling simultaneous process measurement and device diagnostics over a single pair of wires.

Built for deployment in hazardous and demanding industrial environments, this module combines low power consumption with high noise immunity and robust environmental tolerance. It is typically installed within CHARM I/O carriers, allowing flexible, point-based configuration and simplified system expansion.

Key Technical Specifications

• Model: KL3021X1-BA1

• Module Type: Analog Input (AI) CHARM

• Signal Range: 4–20 mA with HART protocol support

• Input Type: Single-ended current input with digital overlay (HART)

• CHARM Bus Power: +6.3 VDC, 32 mA

• Field Loop Supply: +24 VDC, 25 mA

• Isolation: Channel-to-bus isolation (designed for safe field interfacing)

• Update Rate: Suitable for standard process control loops

Environmental & Mechanical Data

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

• Relative Humidity: 5–95% RH, non-condensing

• Shock Resistance: 10 g, 11 ms half-sine

• Vibration Tolerance:

• 2–13.2 Hz: 1 mm displacement

• 13.2–150 Hz: 0.7 g acceleration

• Contamination Rating: ISA-S71.04 Class G3 (harsh industrial environments)

• Weight: 1.17 lbs

• Terminal Key Code: 1A

Hazardous Area Certifications

The module is approved for use in classified locations and supports multiple international standards:

• ATEX: II 3G Ex nA [nL] IIC Gc / Ex ec [ic] IIC Gc

• IECEx Certification

• FM Approved (Class I, Division 2, Groups A, B, C, D)

• UKEX Compliance

Designed for Zone 2 and Division 2 installations, the module must not be inserted or removed while energized unless the area is verified as non-hazardous.

Functional Features

• Integrated HART pass-through for asset management systems

• Point-based CHARM architecture simplifies I/O design

• Eliminates the need for traditional marshalling cabinets

• Supports hot-swappable CHARM carrier design (with safety restrictions)

• High resistance to electrical noise and environmental interference

Typical Applications

• Oil and gas production and refining systems

• Chemical processing plants

• Power generation facilities

• Pharmaceutical manufacturing

• Any installation requiring HART-enabled field instrumentation integration

FAQ

Q: Does this module support full HART communication or only pass-through?
A: It supports HART pass-through, allowing asset management systems to access device diagnostics and configuration data while maintaining analog signal integrity.

Q: Can the module power a 2-wire transmitter directly?
A: Yes, the integrated 24 VDC field supply is designed to support standard loop-powered transmitters within specified current limits.

Q: Is this module interchangeable with other CHARM AI modules?
A: It is functionally similar to other 4–20 mA CHARM inputs but must match the correct terminal block keying and system configuration.