Emerson VE4002S2T2B8

Product Type:​ DeltaV M-series Traditional I/O – Discrete Output (DO) Cards
Product Description:
The VE4002 series are discrete (digital) output interface cards for the DeltaV M-series I/O family. They drive field actuators such as solenoids, relays, alarm horns, and indicator lamps based on control logic executed in the DeltaV controller.
Category:
Description
Technical Specifications:
  • Output Type:​ 24 V DC discrete output (sinking/sourcing depending on specific suffix)
  • Number of Channels:​ Typically 16 or 32 channels depending on revision
  • Output Current per Channel:​ Up to 0.5 A (typical)
  • Surge Protection:​ Built-in TVS (Transient Voltage Suppressor) on each channel
  • Isolation:​ Channel-to-bus isolation ≥ 1500 V DC
  • Response Time:​ < 10 ms on/off
  • Backplane Power:​ 24 V DC
  • Operating Temperature:​ 0 °C to +60 °C
  • Hot-Swap:​ Supported
Functional Features:
  • Short-circuit protection​ with automatic recovery on each output channel
  • Open-load detection​ reports wiring faults to the DeltaV event journal
  • LED status indicators​ per channel for quick visual troubleshooting
  • Fail-safe state​ configurable (hold last state / force off / force on) on communication loss
Application Scenarios:
  • Solenoid valve actuation in process skids
  • Motor start/stop interlock signaling
  • Alarm annunciation (horns, beacons)
  • Interface to relay panels and motor control centers (MCC)
Installation Requirements:
  • Mount on DeltaV M-series DO carrier
  • Pair with correctly rated termination relay or direct-wired termination block
  • Verify load current does not exceed per-channel rating
  • ESD-safe handling mandatory
Usage Notes:
  • The suffix differences (S2T2B8 vs S1T2B5 vs S1T2B1) denote revision and channel configuration variations; confirm exact channel count and electrical rating against the unit label before installation
  • Always de-energize field loads before hot-swapping to prevent inductive kickback damage
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