Overview
Configured for 4-20 mA HART signal acquisition in the Emerson DeltaV CHARM I/O subsystem, the Emerson KL3021X1-BA1 (KL3021X1-BA1 AI 4-20mA HART CHARM Module) provides direct analog input processing and field circuit interface execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | KL3021X1-BA1 |
| Brand | Emerson |
| Product Type | Analog Input Modules |
| System Platform | DeltaV Electronic Marshalling CHARM I/O Subsystem |
| Signal Type | 4-20 mA HART Analog Input |
| Channel Function | AI 4-20 mA HART CHARM |
| Hazardous Area Certification | II 3G Ex nA [nL] IIC Gc; II 3G Ex ec [ic] IIC Gc |
| ATEX Certification | FM19ATEX0173U |
| IECEx Certification | IECEx FMG 19.0019U |
| UKEX Certification | FM21UKEX0017U |
| North America Certification | CL. I Div. 2 GP. A, B, C, D; CL. I Zone 2 AEx/Ex ec [ic] IIC Gc |
| FM Certification | FM17US0286U, FM17CA0145U |
| Terminal Block Key Position | 1A |
| Operating Temp | -40 deg C to +70 deg C |
| Relative Humidity | 5 to 95% non-condensing |
| Airborne Contaminants | ISA-S71.04-1985 Class G3 |
| Shock Resistance | 10 g 1/2 Sinewave for 11 msec |
| Vibration Resistance | 1 mm peak to peak from 2 to 13.2 Hz; 0.7 g from 13.2 to 150 Hz |
| Power Consumption | CHARM bus power: +6.3 VDC at 32 mA; Field circuit: +24 VDC at 25 mA |
4-20 mA HART Loop Processing and Channel Isolation
The KL3021X1-BA1 processes analog field signals through the DeltaV CHARM architecture. It supports 4-20 mA HART communication for intelligent field devices and transfers measurement data through the CHARM bus.
The module receives field circuit power from the 24 VDC supply path while maintaining CHARM bus communication through the 6.3 VDC local interface. In addition, the CHARM design provides channel-level modular installation, allowing individual I/O functions to be configured at the termination point.
The module supports process instrumentation applications requiring HART-enabled device communication. Furthermore, the electrical interface design separates field wiring from system-level processing through the CHARM I/O structure.
Frequently Asked Questions
Q: Can the KL3021X1-BA1 be removed or inserted while system power is energized?
A: The unit cannot be removed or inserted with system power energized unless the installation area is confirmed as non-hazardous. Hazardous area procedures must be followed before CHARM replacement.
Q: Does the KL3021X1-BA1 require user calibration?
A: No. The module does not require calibration, and it contains no user-serviceable parts. The unit should not be disassembled.
Q: How does the terminal block key system work?
A: The CHARM terminal block automatically sets compatibility keys during the first CHARM installation. Installing another CHARM type requires resetting the terminal block keys after removing the terminal block.
Field Installation Guidelines
- Install the KL3021X1-BA1 only on the specified CHARM terminal block with terminal key position 1A.
- Verify hazardous area certification requirements before installation in Ex environments.
- Complete the required I/O loop assessment for energy-limited nodes before field connection.
- Separate analog signal wiring from high-voltage power cables to reduce electromagnetic interference.
- Connect field cable shields according to the site grounding standard and instrument engineering practice.
- Confirm that field devices match the 4-20 mA HART input requirements before commissioning.
- Follow Emerson DeltaV CHARM I/O subsystem installation instructions for removal, insertion, and maintenance procedures.
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