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Emerson VE4001S2T2B6
Emerson VE4001S2T2B6

Emerson VE4001S2T2B4

Product Name:​ DeltaV M-series Traditional I/O — 32-Channel Discrete Input (DI) Card, 24 V DC Dry Contact
Product Overview:​ The VE4001S2T2B4 is a high-density digital input card providing 32 channels of 24 V DC dry-contact sensing in a single carrier slot. It is designed for applications that require large numbers of discrete input points with reliable isolation and diagnostics.
Category:
Description
Technical Specifications:
Parameter
Specification
Channels​
32 independent discrete input channels
Input Signal Type​
24 V DC dry contact
Logic Levels​
High ≥ 11 V DC / Low ≤ 3 V DC
Electrical Isolation​
1500 V DC opto-isolation (channel-to-bus)
Input Impedance​
Approx. 2.4 kΩ (typical)
Response Time​
Typical 5 ms (software configurable)
Power Consumption​
Approx. 5 W typical
Termination Block​
40-pin mass termination block (VE4001S2T2B4 kit)
Operating Temperature​
–40 °C to +70 °C
Hot-Swap​
Supported
Functional Features:
  • High channel density​ — 32 inputs per slot minimizes carrier usage.
  • 1500 V DC opto-isolation​ on every channel prevents field-side high-voltage surges from damaging the controller.
  • Configurable input filter/debounce​ eliminates contact-bounce false triggering.
  • On-board diagnostics​ detect open-wire and short-to-power conditions.
  • Hot-swap capable​ — replacement can be performed without system shutdown.
Application Scenarios:
  • Large-scale acquisition of valve limit-switch, motor-status, and alarm-contact signals in refineries and petrochemical complexes.
  • High-density discrete monitoring in power generation balance-of-plant systems.
  • Bulk material-handling and conveyor interlock status collection.
Installation Requirements:
  • Mount on DeltaV M-series I/O carrier.
  • Use the specified 40-pin mass termination block.
  • Provide 24 V DC field power to the termination block with adequate current for all 32 channels.
  • Route field wiring away from high-voltage cables to maintain signal integrity.
  • ESD-safe handling mandatory.
Usage Notes:
  • Debounce time should be configured according to the mechanical characteristics of the connected contact devices.
  • Open-wire detection helps identify broken field connections during commissioning and operation.
  • Like all VE4001 cards, configuration is auto-loaded from the controller on insertion.
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