The Allen-Bradley 1794-OB16PXT, also cataloged as the 1794-OB16P Digital Output Module, operates as a dedicated hardware component for solid-state discrete DC signal switching within FLEX I/O platforms.

Model Identifier Breakdown

• 1794: Specifies the Allen-Bradley modular distributed architecture platform.
• OB: Indicates a direct current sourcing digital semiconductor output configuration.
• 16: Denotes the density configuration providing exactly 16 switching execution points.
• P: Verifies the implementation of onboard electronic short-circuit protection circuits.
• XT: Signifies extended environmental thermal design ratings for severe operational settings.

Technical Parameters

Backplane Communication Velocity & Network Integrity

The interface logic optimizes bit-state manipulation alongside internal backplane bus communication velocity metrics. When linked into network nodes, the card handles deterministic output updating across EtherNet/IP deterministic networks, maintaining structural state sync while safeguarding logic integrity against transit jitter.

Shipping Package Inventory

• 1 x 1794-OB16PXT Extended Temperature Sourcing Output Module
• 1 x Industrial Field Assembly Instructions Datasheet

Installation Practices & Mechanical Alignment

• Chassis Integration
  • Rotate the alignment keys on the structural terminal base unit to index position 2 prior to insertion.
  • Press the module straight down into the matching terminal base alignment channel until the retaining side wings lock completely.
• Wiring and Ground Integrity
  • Route the 24 VDC load sourcing connections separate from low-energy analog instrument loop tracks inside the enclosure wire ducts.
  • Maintain low-impedance connection paths across the DIN-rail backplane frame to discharge local electromagnetic noise fields.

Hardware Infrastructure FAQ

• Does the extended thermal variant permit continuous operation at the maximum rated current across the entire temperature window?

  Yes, thermal dissipation characteristics are verified to maintain full 0.5 A per channel output execution up to +70 deg C ambient environments.

• Can this specific hardware assembly be extracted or replaced while the backplane power remains active?

  Removal and insertion under power (RIUP) operations are supported by the logic interface provided the site zone is verified as safe.

• What is the maximum current drawn from the local backplane logic rail by this module?

  The internal microcircuit assembly demands a maximum current draw of 80 mA from the 5 VDC system backplane connection.

• How does the electronic protection system handle an external short-circuit fault?

  The specific overloaded output channel automatically shifts to a protected state, dropping the individual point current down near zero.

• What is the maximum off-state leakage current specification for the solid-state sourcing switches?

  Each output channel exhibits an off-state leakage parameter limited to a maximum of 0.5 mA under full field voltage.

• What state do the sourcing outputs assume if communication across the backplane bus drops out?

  The 16 internal execution points automatically drop down to their unenergized off state or shift to user-programmed safe values.

• What level of galvanic electrical isolation is built into the module circuitry?

  Internal optocoupler components isolate the field-side loops from the backplane processing electronics up to a continuous test value of 850 VDC.

• Can multiple output channels on this module be hardwired in parallel to drive high-amperage solenoids?

  Parallel matching of output channels within the same common electrical group is functional to scale total drive current up as required.