SE4302T02 DeltaV DO 24 VDC Isolated CHARM | Emerson

Configured for discrete output control in DeltaV I/O subsystems, the Emerson SE4302T02 (SE4302T02 DO 24 VDC Isolated CHARM) provides direct physical/electrical execution of 24 VDC inductive load switching.

Hardware Specifications

Process Control: Galvanic Isolation

The SE4302T02 output channel incorporates galvanic isolation, factory tested to 1000 VDC. This electrical barrier separates the internal logic circuitry of the CHARM from the field-side switching environment. By decoupling the output circuit, the module effectively prevents ground loops and high-voltage transients from field-side inductive load collapse from propagating into the control bus. This isolation ensures that faults within the field wiring do not compromise the operational integrity of the system backplane or adjacent CHARM modules.

Frequently Asked Questions (FAQ)

Q: Does this module support inductive load switching?

A: Yes. The SE4302T02 is designed to handle inductive loads with an output rating of 1.0 A continuous and a 2 A inrush capability for durations less than 100 ms.

Q: How is the output channel protected against short circuits?

A: The module features an integrated 4 A current-limiting circuit with thermal shutoff and automatic reset. While this provides internal protection, the use of an external fuse at the power source is recommended to ensure complete field wiring protection.

Field Installation Guidelines

• Mounting: Seat the SE4302T02 onto the CHARM carrier base. Ensure the mechanical interface is secure to maintain electrical continuity between the CHARM pins and the carrier backplane.

• Wiring: Connect the field device to the output terminals. Observe polarity for DC loads. Ensure that the cumulative current draw of the field circuit does not exceed the 1.0 A continuous rating.

• Shielding: When driving long-distance field lines, use shielded cable to minimize electromagnetic emissions and inductive coupling to adjacent signal wires. Ground the shield at the cabinet entry point.

• Verification: Use the DeltaV control workstation to perform a loop test. Configure the output behavior as required (Momentary or Continuous Pulse) and confirm correct state transition at the field device terminal.