Configured for high-density multi-channel discrete state detection in industrial control architectures, the Allen-Bradley 1746-IV32 1746IV32 (1746-IV32/B, 1746-IV32/C, 1746-IV32/D Current Sourcing DC Input Module) provides direct physical and electrical execution for processing thirty-two distinct 24 VDC sourcing input channels across controller chassis backplanes.

Catalog Identification & Suffix Hierarchy

Physical & Electrical Hardware Parameters

System Bus Integration & Data Processing Characteristics

The hardware utilizes backplane bus communication velocity licences to maintain deterministic polling rates across high-density discrete input channels. I/O density scaling capabilities allow operators to aggregate multi-channel sensor arrays across available backplane slots without violating bus timing constraints or scan interval limits. Firmware flash compatibility ensures that low-level communication protocol stacks remain synchronized with controller processors during active industrial monitoring.

Package Contents & Ordering Bill of Materials

• 1 x Allen-Bradley 1746-IV32 Current Sourcing DC Input Module (Part Number: 1746IV32)
• 2 x Removable Terminal Block (RTB) Connectors
• 1 x Technical Compliance Documentation Leaflet

Physical Mounting & Circuit Wiring Directives

• Ensure chassis backplane power is completely isolated before inserting or extracting the discrete input module.
• Mount the unit into any standard I/O slot within the SLC 500 chassis, confirming proper alignment with backplane guide rails.
• Connect field sensor wiring to the dual removable terminal blocks, maintaining strict adherence to 8-point common grouping configurations.
• Route DC input cables away from high-voltage power lines and variable frequency drives to mitigate electromagnetic induction.

Frequently Asked Questions

• Q: What is the primary operational function of this module within the control system?
• A: It samples thirty-two independent 24 VDC sourcing discrete input signals from field devices and converts them into logic-level states for the controller.
• Q: How many input points share a common connection on this hardware card?
• A: The module is organized with thirty-two total points separated into discrete banks of eight points per common.
• Q: What is the allowable input voltage operating range for the channels?
• A: The input circuitry accepts a continuous voltage window spanning from 10 VDC to 30 VDC.
• Q: What threshold defines an off-state condition for the inputs?
• A: Any incoming voltage level at or below 5 VDC is recognized reliably by the internal logic as an off-state condition.
• Q: What is the specified operating temperature range for the hardware?
• A: The module functions within an ambient operating temperature range of 0 deg C to +60 deg C.
• Q: Does this module support live insertion and removal (hot-swapping)?
• A: No, power to the chassis rack must be completely turned off prior to installing or removing the unit.
• Q: Why is proper grouping of commons critical during field wiring?
• A: Correct common assignment prevents floating reference potentials and ensures accurate state recognition across all input channels.
• Q: What maintenance procedures are recommended for this unit?
• A: Periodically verify terminal screw torque values and ensure internal cabinet airflow paths remain unobstructed.