Product Core Brief
- Model: SE4301T02
- Brand: Emerson (DeltaV)
- Series: DeltaV S-Series / CHARMs
- Core Function: Provides a single-channel, configurable I/O interface for field signal acquisition and control.
- Product Type: LS-CHARM (Local Signal CHARM) Electronic Module
- Key Specs: Single-Channel | Configurable I/O | Field-Mountable | Hot-Swappable
- Condition: New Original / New Surplus

Emerson SE4301T02
Product Introduction
The Emerson SE4301T02 is a fundamental building block of the DeltaV S-Series architecture, functioning as a Local Signal CHARM. This module is designed to be installed directly in the field, close to the process sensors and actuators, rather than in a centralized control room I/O chassis.
Its key advantage is configurability: a single SE4301T02 module can be set up via software to function as an Analog Input (AI), Analog Output (AO), Discrete Input (DI), or Discrete Output (DO). This eliminates the need to stock multiple types of traditional I/O cards and simplifies engineering changes. The module connects to the DeltaV controller via a high-speed digital bus, supporting hot-swapping for easy maintenance without system downtime.
Key Technical Specifications
- Module Type: LS-CHARM Electronic Module
- System: Emerson DeltaV S-Series DCS
- Channel Count: Single Channel
- I/O Type: Software-Configurable (AI, AO, DI, DO)
- Mounting: Field-Mountable (typically in a CHARM I/O Assembly)
- Features: Hot-swappable, Built-in diagnostics, LED status indicators
- Application: Distributed I/O, remote wellheads, skid-mounted packages, brownfield upgrades
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Verify part number SE4301T02. Inspect the rear connector and front panel for physical damage or corrosion.
- Visual Inspection: Check the PCB for signs of overheating, flux residue, or component failure. Ensure the CHARM locking mechanism is intact.
- Live Functional Test: Install in a CHARM I/O Assembly. Verify the module is recognized by the DeltaV controller and the status LED indicates normal operation.
- Configuration Test: Use DeltaV Live or AMS to verify the module’s configured I/O type matches the application. Force a value (for output) or inject a signal (for input) to confirm correct scaling and response.
- Final QC & Packaging: Seal in an anti-static bag. Apply a QC Passed label with the date.

Emerson SE4301T02
Replacement Pitfall Guide
❗ CHARM vs. Traditional I/O: The SE4301T02 is a CHARM, not a traditional 16/32-channel I/O card. It requires a specific CHARM I/O Assembly (e.g., KJ3009X1-BA1, KJ3245X1-BA1) and a CHARM Carrier for field wiring termination. Do not attempt to install it in a standard DeltaV I/O chassis.
❗ Configuration is Key: This module is not pre-configured. You must use DeltaV configuration software to assign its function (AI, AO, DI, DO) and signal range. A replacement module will need to be configured to match the original.
❗ Assembly Compatibility: Ensure the is installed in a compatible CHARM I/O Assembly. Mixing incompatible assemblies can lead to communication or power issues.
❗ Field Wiring: As a field-mounted device, the is exposed to harsher environments. When replacing, inspect the field wiring and termination points for corrosion or damage caused by moisture or vibration.
❗ Hot-Swapping: While hot-swappable, always verify that the specific channel is not tied to a critical safety interlock before removal to prevent unintended process upsets.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
- → SS4301T02 : Related — The SS variant is the Safety CHARM, designed for SIS applications. Do not substitute an SE for an SS in a safety loop.
- → KJ3009X1-BA1 / KJ3245X1-BA1 : Complementary — CHARM I/O Assemblies that house the and provide field wiring termination.
- → DeltaV S-Series Controller : System — Connects via the high-speed digital CHARM bus.
- → SE4302T01 / SE4303T01 : Related — Other LS-CHARM variants, potentially with different environmental ratings or features.
Benchmarks:
- Flexibility: One module type supports multiple I/O functions
- Diagnostics: Channel-level diagnostics for rapid troubleshooting
- Density: High I/O density per assembly footprint
Need me to pull up the matching CHARM I/O Assembly (e.g., KJ3009X1-BA1) or the Safety variant SS4301T02 for your application? Let me know which one you’d like.







