What Is SCADA? Supervisory Control Without Replacing the PLC
SCADA sits above PLCs and RTUs: it acquires field data, alarms operators, and issues supervisory commands across plants and remote assets—without replacing local deterministic control.



The Emerson VE3008 is an MQ Controller designed for the DeltaV Distributed Control System (DCS). This hardware component provides communication and control between field devices and other nodes on the control network. It executes local control strategies with execution speeds up to every 100 ms. The VE3008 offers identical configurable memory and execution capabilities to the legacy MD Plus Controller, supporting seamless system scalability and legacy migrations. Online operational updates are automatically captured to ensure data integrity within the plant architecture.
| Description | Model Number |
|---|---|
| MQ Controller | VE3008 |
| Controller Module Hold-down Screw; box of 20 | KJ4010X1-BP3 |
| Parameter | Specification |
|---|---|
| Manufacturer | Emerson |
| Model Type | MQ Controller |
| Hardware Assembly / Part Number | KJ2005X1-MQ1 |
| Component Layout Print Reference | 12P6381X022 REV B |
| Manufacturing Origin | Made in Malaysia |
| User Memory Capacity | 48 MB |
| Device Signal Tag (DST) Range | 50 to 750 DSTs |
| Power Supply Source Requirement | Supplied by System Power Supply through 2-wide Power/Controller Carrier |
| Power Dissipation | 5.0 W typical, 7.0 W maximum |
| Internal Overcurrent Protection | 3.0 A, non-replaceable fuses |
| Primary Network Interface | 8-pin RJ-45 connector |
| Redundant Network Interface | 8-pin RJ-45 connector |
| Module Width | 4.18 cm (1.65 in.) |
| Module Depth | 13.91 cm (5.48 in.) |
| Module Height | 16.06 cm (6.32 in.) |
| Operating Temperature Limit | -40 to 70 degC (-40 to 158 degF) |
| Storage Temperature Limit | -40 to 85 degC (-40 to 185 degF) |
| Relative Humidity Bounds | 5 to 95%, non-condensing |
| Environmental Gaseous Protection | ISA-S71.04-1985 Airborne Contaminants Class G3 Conformal coating |
| Operational Shock Resistance | 10 g 2-sine wave for 11 ms |
| Operational Vibration Limit | 1 mm peak-to-peak from 5 Hz to 16 Hz; 0.5 g from 16 Hz to 150 Hz |
| LED Indicator Status | Functional Meaning |
|---|---|
| Green - Power | Indicates DC power is applied |
| Red - Error | Indicates an error condition |
| Green - Active | Indicates that the controller is operating as the primary controller |
| Green - Standby | Indicates that the controller is operating as a backup controller (reserved for future use) |
| Yellow Flashing - Pri. CN | Indicates valid primary control network communication |
| Yellow Flashing - Sec. CN | Indicates valid secondary control network communication |
| All except Power flashing | Visual identification of controller initiated from user interface software by ping command |
| All except Power flashing, alternating | Firmware upgrade in progress |
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| Color pattern |
Black
|
| Country of origin |
United States
|
| Power source |
DC Power
AC-powered
|