Product Overview

The Emerson SE4002S1T1B1 DeltaV S-series Discrete Output Card is used to send binary control commands from an Emerson DeltaV system toward field equipment. While a discrete input card brings equipment status into the controller, a discrete output card works in the opposite direction: it takes a programmed ON/OFF command and delivers the corresponding output signal to the field interface.

In a process plant, many actions are based on a simple state command. A control sequence may need to start a pump, energize a relay, command a solenoid, activate an alarm device, or change the state of another discrete actuator. The SE4002S1T1B1 sits between the DeltaV control logic and these field-side devices.

A typical operating sequence might look like:

Operator Command → DeltaV Logic → SE4002S1T1B1 → Field Interface → Equipment Action

For example, when a pump receives a start command, the DeltaV application determines that the required permissives are satisfied. The output channel then changes state, allowing the associated field circuit to initiate the commanded action.

The output card is therefore closely tied to the final-control portion of a process automation system. Its actual field application depends on the connected equipment, electrical interface, termination arrangement, and DeltaV configuration.

For maintenance engineers, an output fault should not automatically be attributed to the card. A field relay, solenoid, fuse, wiring connection, termination component, or configuration problem can produce similar symptoms. Checking the entire output path is usually the more practical troubleshooting approach.

Technical Specifications

Product Features

The SE4002S1T1B1 handles discrete output commands within a DeltaV S-series architecture.

• Emerson DeltaV S-series Discrete Output Card
• Model SE4002S1T1B1
• Used for binary field-device control
• Transfers DeltaV logic commands toward field equipment
• Suitable for ON/OFF control applications
• Applicable to relay and solenoid control circuits
• Useful for motor and equipment command signals
• Integrates with DeltaV S-series I/O architecture
• Suitable for process and industrial automation systems
• Relevant to maintenance and replacement applications

The connected field device and electrical interface should be verified before replacing the card.

Working Principle

The SE4002S1T1B1 receives an output command generated by the DeltaV control application and changes the corresponding output channel state.

A practical control path is:

DeltaV Control Logic → SE4002S1T1B1 → Termination / Field Wiring → Relay or Actuator → Equipment

Consider a motor-start application.

First, the DeltaV logic evaluates the operating conditions and required permissives. When the start command is accepted, the corresponding output channel changes state. The signal then travels through the termination and field wiring to the associated control circuit.

The field equipment responds to that command.

The sequence can be summarized as:

Control Decision → Output State → Field Circuit → Equipment Response

The same concept can apply to a solenoid valve:

Valve Command → Discrete Output → Solenoid Circuit → Valve Actuation

Or to a relay-controlled device:

Control Logic → Output Channel → Relay Energization → External Equipment

The card itself does not determine whether the machine should start or stop. That decision comes from the DeltaV application logic. The output card forms the electrical interface that carries the resulting discrete command toward the field.

Role in a DeltaV S-series Control Architecture

The SE4002S1T1B1 occupies the output side of the DeltaV I/O architecture.

A simplified arrangement is:

Operator / Automatic Logic → DeltaV Controller → SE4002S1T1B1 → Termination → Field Device

In many installations, the output card does not directly drive the main load. An intermediate relay, interface device, or actuator circuit may sit between the I/O channel and the equipment.

Discrete Output Control in Process Automation

Discrete outputs are commonly used where equipment needs a defined command rather than a continuously variable control signal.

Typical commands include:

• Start
• Stop
• Open
• Close
• Enable
• Disable
• Reset
• Energize
• De-energize
• Alarm activation

For example, a process valve may use separate discrete commands for opening and closing, while a pump-control circuit may use an output signal to initiate a start sequence.

The output signal is only one part of the control chain. The field device must also be capable of interpreting the command correctly, and any required relay, fuse, interface, or actuator must be correctly connected.

This is why commissioning should verify both command generation and actual equipment response.

Industrial Applications

The actual application depends on the DeltaV configuration and connected field devices.

Installation and Maintenance

Output cards require careful testing because an incorrect output signal can affect physical equipment.

Recommended practices include:

• Confirm the complete SE4002S1T1B1 model.
• Verify the intended DeltaV I/O position.
• Review the existing channel configuration.
• Identify the field device associated with each output.
• Record field wiring before removal.
• Check termination connections.
• Verify relay or interface components.
• Inspect output wiring for damage or loose connections.
• Confirm the required field-side electrical arrangement.
• Review the DeltaV output configuration.
• Inspect the card and connectors.
• Follow the approved equipment isolation procedure.
• Install the replacement card correctly.
• Restore the field wiring.
• Verify output-channel diagnostics.
• Perform controlled output testing.
• Confirm the field device responds to the command.
• Check associated feedback inputs.
• Verify alarms and interlocks.
• Confirm automatic sequences operate correctly.
• Record the completed maintenance configuration.

When an output channel appears active but the equipment does not respond, troubleshooting should proceed through:

DeltaV Command → Output Channel → Termination → Wiring → Relay / Interface → Field Device

This prevents unnecessary replacement of an otherwise functional I/O card.

Compatible System Components

The SE4002S1T1B1 normally works with several layers of the DeltaV control and field interface system.

The feedback input is especially useful in applications where the controller needs confirmation that the commanded action actually occurred.

Recommended Related Models

The following models are selected according to their relevance to Emerson DeltaV discrete I/O and control applications, rather than simply listing unrelated modules from the same platform.

Key Advantages

• Emerson DeltaV S-series Discrete Output Card.
• Model SE4002S1T1B1.
• Sends binary control commands to field circuits.
• Suitable for start/stop and open/close applications.
• Applicable to relay, solenoid, motor, and actuator control.
• Integrates with DeltaV control logic.
• Useful for process sequences and interlock-driven actions.
• Suitable for maintenance and replacement work.

Technical FAQs

What is the difference between the SE4002S1T1B1 and a DeltaV discrete input card?

The SE4002S1T1B1 is used to send commands from the control system toward field equipment. A discrete input card performs the opposite task by receiving field-status information. In a motor application, for example, the output can issue a start command while a separate input can report whether the motor actually started.

Why might a field device fail to respond even when the output channel changes state?

The problem may exist downstream of the I/O card. Engineers should check the termination point, field wiring, fuse or protection device, interposing relay, solenoid or actuator, and the field equipment itself. The output indication alone does not prove that the final device has completed the commanded action.

Why is feedback often used together with a discrete output?

A command and a confirmation are two different pieces of information. The output tells the field device what action to perform, while a feedback input can tell DeltaV whether the expected state was actually reached. This is useful for pump starts, valve movement, motor operation, and interlock sequences.

What should be tested after replacing an SE4002S1T1B1?

The test should cover the complete command path. Verify the output channel, field-side signal, associated relay or actuator, and actual equipment response. Where feedback is available, confirm that the corresponding input changes correctly and that the DeltaV application recognizes the completed operation.