Overview
The Emerson KL3105X1-BA1, also cataloged as the KL3105X1-BA1 I.S. Thermocouple / mV CHARM, operates as a dedicated hardware component for thermocouple and millivolt signal acquisition within the DeltaV Electronic Marshalling CHARM subsystem.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | KL3105X1-BA1 |
| Brand | Emerson |
| Origin | USA |
| Operating Temp | -40 deg C to +70 deg C |
| Power Consumption | CHARM Bus: +6.3 VDC at 0 mA; Field Circuit: +24 VDC at 23 mA |
| Product Type | Intrinsically Safe Thermocouple / mV Input CHARM |
| Signal Type | Thermocouple and millivolt input |
| System Platform | DeltaV Electronic Marshalling CHARM Subsystem |
| Terminal Block Key Position | C5 |
| Relative Humidity | 5 to 95% non-condensing |
| 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 |
| Airborne Contaminants | ISA-S71.04-1985 Class G3 |
| Hazardous Area Certification | II 3(1) G Ex ec [ia Ga] IIC Gc; II 3G (1D) Ex ec [ia IIIC Da] IIC Gc |
| ATEX Certification | FM11ATEX 0030U |
| IECEx Certification | IECEx FMG 11.0014U |
| UKEX Certification | FM21UKEX0156U |
| North American Certification | CL1, DIV 2, GP A-D; Associated CL I, II, III, DIV 1, GP A-G |
| Zone Certification | CL I, ZN 2 AEx ec [ia Ga] IIC Gc; CL I, ZN 2 AEx ec [ia IIIC Da] IIC Gc |
Cold Junction Compensation and Signal Isolation
The Emerson KL3105X1-BA1 processes thermocouple and mV field signals through the DeltaV CHARM architecture. The module supports intrinsic safety applications with certified hazardous area interfaces. Furthermore, the design incorporates field circuit separation for thermocouple measurement applications and maintains signal integrity through controlled electrical isolation.
The thermocouple input function supports cold junction compensation (CJC) requirements for temperature measurement circuits. In addition, the CHARM design allows channel-level configuration within the DeltaV system without traditional marshalling cabinets.
Frequently Asked Questions
Q: Can the KL3105X1-BA1 be removed while system power is energized?
A: No. The module cannot be removed or inserted with system power energized. Follow DeltaV CHARM installation procedures before replacement or maintenance operations.
Q: Does the KL3105X1-BA1 require field calibration?
A: No. The unit does not require calibration and contains no user serviceable parts. The module should not be disassembled.
Q: What environmental conditions does the KL3105X1-BA1 support?
A: The module operates from -40 deg C to +70 deg C and supports 5 to 95% non-condensing relative humidity. It also meets ISA-S71.04-1985 airborne contaminant Class G3 requirements.
Field Installation Guidelines
Install the KL3105X1-BA1 according to the DeltaV IS-CHARM Subsystem installation instructions and applicable hazardous area control drawings.
Verify the module label before installation to confirm serial number, manufacturing information, and certification markings. In addition, maintain proper segregation between intrinsically safe field wiring and non-intrinsically safe circuits.
Use appropriate shield termination practices for thermocouple and mV signal wiring. Connect cable shields according to the plant grounding standard to reduce electrical interference while maintaining intrinsic safety requirements.
Do not insert or remove the module under energized conditions. Inspect terminal connections, field wiring routing, and enclosure requirements before applying system power.
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