Emerson KL3106X1-LS1 Safe RTD Input CHARM

The KL3106X1-LS1 functions as a safe RTD and resistance input module within Emerson DeltaV safety systems. Engineers deploy this CHARM module for precise temperature monitoring in safety-critical process loops. Moreover, it accepts resistive sensor signals and converts them into reliable digital measurements.

Physical Dimensions and Weight

This module measures approximately 12.0 cm in height and 2.5 cm in width. Additionally, it weighs roughly 0.15 kg, which suits dense CHARM carrier layouts. The slim housing lets technicians populate multiple slots within a single carrier.

Input Channels and Interface Details

The KL3106X1-LS1 supports one RTD or resistance input channel per module. Specifically, it accepts 2-wire, 3-wire, and 4-wire RTD configurations for flexible field wiring. Furthermore, the module connects to the CHARM carrier through a plug-in backplane interface. This interface carries both power and digital communication to the DeltaV controller.

Component Architecture and Energy Storage

The design integrates a precision A/D converter and isolation circuitry on a compact PCB. In addition, onboard capacitive storage maintains measurement stability during brief supply dips. Specifically, this energy storage sustains diagnostic reporting for up to 20 milliseconds after power loss.

Key Technical Parameters

Parameter	Specification
Module Type	Safe RTD/Resistance Input CHARM
Input Channels	1 per module
RTD Wiring	2-wire, 3-wire, 4-wire
Dimensions (H × W)	12.0 cm × 2.5 cm
Weight	0.15 kg
Connector Type	Plug-in backplane / screw terminal
Energy Storage	Capacitive, 20 ms ride-through
Isolation	Galvanic per channel
Safety Certification	SIL-rated for DeltaV SIS
Operating Temperature	0 °C to 60 °C

Diagnostic and Fault-Tolerant Behavior

Each channel performs open-sensor and short-circuit checks before the module reports to the safety controller. Therefore, the KL3106X1-LS1 detects wiring degradation and sensor drift early. As a result, maintenance teams schedule calibration before measurement accuracy affects the safety loop.

Integration within DeltaV Safety Architectures

The module operates alongside companion CHARM modules on the same carrier assembly. Meanwhile, hot-swap capability lets technicians replace a faulty unit without stopping the safety system. Consequently, plant operators maintain continuous protection throughout routine maintenance windows.