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- Emerson
- SE4002S2T2B2
- Discrete Output Card
- USA
- 131 × 41.8 × 130.8 mm
- 0.4 kg
- Xiamen, China
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Product Overview
Within a DeltaV S-series installation, the Emerson SE4002S2T2B2 handles the discrete side of field control. It takes output states from the DeltaV control system and passes the corresponding commands into field circuits connected to process equipment.
This type of output interface is used where equipment operates through defined states rather than a continuously adjustable signal. Common examples include solenoid-operated valves, relay circuits, contactors, alarms, and interlock functions.
The SE4002S2T2B2 can therefore be found in control architectures where discrete field commands need to be incorporated into automated process sequences and equipment control.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Emerson |
| Model | SE4002S2T2B2 |
| Product Family | DeltaV S-series |
| Product Type | Discrete Output Card |
| Application | Discrete Output Control |
| Dimensions | 131 × 41.8 × 130.8 mm |
| Weight | 0.4 kg |
Main Features
- DeltaV S-series discrete output card
- Model SE4002S2T2B2
- Discrete field output interface
- Suitable for two-state control applications
- Interfaces DeltaV control logic with field circuits
- Applicable to solenoid and valve control
- Suitable for relay and contactor applications
- Supports alarm and interlock functions
- Fits modular DeltaV I/O configurations
- Suitable for maintenance and replacement applications
Working Principle
The SE4002S2T2B2 follows the output path from the DeltaV control strategy toward the field device.
Control Strategy → DeltaV Controller → S-series I/O → SE4002S2T2B2 → Field Circuit → Controlled Equipment
The controller determines the required output state according to the configured control logic. The card then handles the corresponding discrete output condition.
For example, a control sequence may issue a command to energize a solenoid. The output card changes the associated output state, and the field circuit uses that state to operate the connected device.
Output Signal Functions
| Function | Typical Equipment |
|---|---|
| Equipment Start | Motor starter / contactor |
| Equipment Stop | Motor control circuit |
| Valve Command | Solenoid-operated valve |
| Relay Switching | Auxiliary control circuit |
| Alarm Activation | Annunciator |
| Interlock Action | Protective or permissive circuit |
| Sequence Step | Automated equipment |
DeltaV S-series Architecture
| System Level | Function |
|---|---|
| Control Application | Defines equipment behavior |
| DeltaV Controller | Executes control logic |
| S-series I/O | Provides field interface |
| SE4002S2T2B2 | Handles discrete output |
| Field Wiring | Carries the output signal |
| Intermediate Device | Relay, contactor, or interface |
| Final Equipment | Performs the commanded action |
The output card is one part of the complete control path. Correct operation depends on the controller configuration, I/O hardware, field interface, and connected equipment working together.
Industrial Applications
Oil and Gas
Discrete commands can be used for valve actuation, auxiliary equipment, alarms, and process interlocks.
Chemical Plants
The card can support solenoid control, equipment sequencing, and discrete process actions.
Power Generation
Typical functions include auxiliary equipment commands, annunciation, and discrete control sequences.
Water Treatment
Applications include pump control, valve operation, alarm circuits, and equipment interlocks.
Manufacturing
The card can be used for machine actuators, contactor commands, relay circuits, and automated sequence control.
Installation and Maintenance
- Confirm the SE4002S2T2B2 model.
- Check the DeltaV I/O configuration.
- Verify the assigned output channels.
- Review the associated field-circuit arrangement.
- Isolate applicable power before replacement.
- Inspect connectors and terminals.
- Check field wiring for loose or damaged connections.
- Install the replacement card.
- Verify proper seating and connection.
- Restore the applicable circuits.
- Check DeltaV diagnostics.
- Confirm configured output states.
- Test representative output channels.
- Verify the response of connected field devices.
- Review alarms and diagnostics after testing.
A failed field action should be traced through the complete path rather than automatically attributed to the output card.
Compatible System Components
| Component | Function |
|---|---|
| Emerson SE4002S2T2B2 | DeltaV S-series Discrete Output Card |
| DeltaV S-series Controller | Control logic execution |
| S-series I/O Hardware | Field signal interface |
| Field Terminal Hardware | Field wiring connection |
| Relay / Contactor | External circuit switching |
| Solenoid Valve | Discrete actuation |
| Process Equipment | Receives control commands |
| Operator Station | Monitoring and control |
Recommended Related Models
| Model | Product Type |
|---|---|
| Emerson SE4002S2T2B2 | DeltaV S-series Discrete Output Card |
| Emerson SE4002S2T2B1 | DeltaV S-series Discrete Output Card |
| Emerson SE4002S2T1B1 | DeltaV S-series Discrete Output Card |
| Emerson SE4002S2T1B2 | DeltaV S-series Discrete Output Card |
| Emerson SE4002S1T1B1 | DeltaV S-series Discrete Output Card |
| Emerson SE4002S1T1B3 | DeltaV S-series Discrete Output Card |
| Emerson SE4002S1T2B6 | DeltaV S-series Discrete Output Card |
Key Advantages
- Emerson DeltaV S-series discrete output interface
- Model SE4002S2T2B2
- Suitable for discrete field-device control
- Supports valve and solenoid applications
- Applicable to relay and contactor control
- Supports equipment sequences and interlocks
- Integrates into modular DeltaV I/O architecture
- Suitable for process automation and maintenance applications
Technical FAQs
What happens to a process sequence when a required discrete output does not change state?
The sequence may remain at its current step because the commanded equipment action has not occurred. Depending on the control strategy, this can result in an alarm, timeout, interlock condition, or failure to advance to the next sequence state.
Can a discrete output be used to control a device indirectly?
Yes. An output circuit may operate an intermediate relay or contactor, which then switches a separate field circuit. This arrangement is commonly used when the final equipment requires a different electrical interface.
Why should the field circuit be checked even when the output card diagnostics appear normal?
A normal module diagnostic does not necessarily confirm that the final actuator is receiving the intended operating condition. Wiring, terminal connections, intermediate components, and the actuator itself remain part of the complete signal path.
What is the value of checking several output channels during troubleshooting?
Testing multiple channels can help distinguish an isolated channel problem from a broader issue involving the I/O interface, configuration, power, or field connection. A pattern affecting several channels can provide useful evidence about where the fault originates.