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Stocking the Emerson DeltaV SS4303T01 (KL3021X1-LS1) Logic Solver AI CHARM? Get exact technical specs, SIL 3 deployment limits, and warehouse min/max levels.
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Why are your instrument technicians still tracking down cross-wiring faults in safety-critical termination cabinets? When my engineering team designed our first functional safety system under IEC 61511 guidelines, we targeted physical cabinet clutter as a primary source of loop failure. The Emerson DeltaV SS4303T01 (cataloged as KL3021X1-LS1) is a Logic Solver Analog Input (LS AI) Characterization Module designed for DeltaV SIS electronic marshalling. This specific hardware allows you to land 4–20 mA field loops with or without HART diagnostics directly onto a common terminal plate, shifting configuration tasks to the software level.
Technical Parameters
- Part Number: SS4303T01 / KL3021X1-LS1
- Device Type: Logic Solver Analog Input (LS AI) HART CHARM
- Input Impedance: 250 ohms ±1%
- Full Input Range: 0 to 24 mA
- Field Power Provision: 15.0 V at 20 mA for 2-wire setups
- Measurement Accuracy: 0.1% of span (0 to 60 °C)
- Safety Trip Accuracy: 2% of span
- Field Circuit Protection: Integrated 30 mA current limit and physical disconnect
- Communication Support: HART v7 pass-through for AMS device managers
Critical Sparing Decisions
According to standard plant maintenance records, failure of an individual input module rarely triggers an immediate plant trip because of the redundant architecture of the safety logic solvers. However, because safety loops dictate strict compliance windows, an unresolved channel fault can quickly force you to bypass a loop or initiate a manual shutdown. Classify the SS4303T01 as a Class B safety spare.
To prevent extended lead times during project commissioning, build a local buffer stock rather than relying on global distribution networks. This shields your schedule from lead time variability, which historically fluctuates between 3 days and 14 weeks depending on component scarcity.
Not Recommended For:
Do not use this module for high-voltage AC loops or RTD temperature inputs. Attempting to run high-voltage field wiring directly into the SS4303T01 without isolation barrier blocks will blow the internal 30 mA current limit circuit and damage the carrier plate.
