Allen-Bradley 1734-IV4 POINT I/O Digital DC Sourcing Input Module

The Allen-Bradley 1734-IV4, also cataloged as the 1734-IV4 Digital DC Sourcing Input Module, operates as a dedicated hardware component for 24 VDC discrete sourcing signal acquisition within POINT I/O control platforms.

Hardware Specifications

POINTBus Backplane Velocity and I/O Density Scaling

• Low POINTBus backplane current draw of 75 mA at 5 VDC enables high-density slot expansion across localized terminal assemblies.
• 4-channel sourcing configuration processes field signals using a 1-byte register mapping scheme (bits 0–3 active) to streamline network bandwidth usage.
• Hardware input filtering combines fixed 0.5 ms hardware response with user-selectable software delay profiles (0 to 63 ms) to suppress field signal contact bounce.

Frequently Asked Questions

Q: Does the 1734-IV4 module support Removal and Insertion Under Power (RIUP)?

A: Yes, the 1734-IV4 module supports RIUP, allowing module replacement while backplane power is applied without interrupting adjacent system operation.

Q: What size field wiring is accepted by the compatible terminal bases?

A: The module's terminal bases (1734-TB and 1734-TBS) accept 22 to 14 AWG solid or stranded copper wire conductors.

Field Installation Guidelines

• Mount the compatible terminal base assembly (1734-TB or 1734-TBS) onto a grounded 35 mm DIN rail in either horizontal or vertical orientation.
• Ensure all 24 VDC sourcing input field conductors (22 to 14 AWG) are securely terminated into the cage-clamp or spring-terminal screw terminals.
• Maintain proper physical segregation between DC signal cables and high-voltage AC conductors within panel wire ducts to prevent signal corruption.
• Verify proper earthing of the DIN rail structure to maintain the module's 50 V continuous insulation rating.