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The 1746-IV32 is a high-density SLC 500 digital input module that provides 32 sinking input points configured in two isolated groups of 16. It operates at a nominal 24V DC and requires a 40-pin telecommunication-style connector, such as the 1746-N3, for field-side wiring interface.
32-Point Chassis Efficiency
Dual-Group Isolation
1746-N3 Connector Interface
This module features an operating voltage range of 15 to 30V DC and provides a maximum signal delay of 3.0 ms for both ON and OFF transitions. Its high-density 32-point design significantly reduces the number of chassis slots required for large I/O systems while maintaining optical isolation to protect the processor logic from field-side electrical noise.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Allen-Bradley 1746-IV32 Current Sourcing DC Input Module Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Automotive Assembly
Used for receiving signals from DC proximity sensors and limit switches in high-speed production. The 32-point density in a single slot maximizes I/O count for complex robotic cell coordination.
Food Processing
Implemented in automated sorting and packaging systems to monitor discrete sensor feedback. It provides 1500V optical isolation to protect the processor logic from electrical noise in wash-down environments.
Material Handling
Applied in conveyor control and automated storage retrieval systems (AS/RS). The module utilizes two isolated groups of 16 points, allowing for organized wiring of diverse field-side input devices.
Petrochemical Refineries
Deployed in control rooms for monitoring remote status indicators and valve position sensors. It operates within a 15 to 30V DC range at 50 °C, ensuring stable signal detection in high-temperature industrial climates.
Packaging Machinery
Utilized in high-density labeling and wrapping equipment requiring compact I/O footprints. The 40-pin telecommunication-style connector interface (1746-N3) facilitates rapid, organized field-side wiring and maintenance.
Water Treatment
Used in pumping station control panels to interface with 24V DC level switches and flow transmitters. The module draws only 0.170 A from the 5V DC backplane, reducing total system power consumption.
Lead Wire Resistance Constraints：For 3-wire RTD configurations, the module compensates for lead wire resistance if all three leads are of equal length and material. To maintain specified accuracy, the maximum lead wire resistance must not exceed 25 ohms for any single wire.
Shielding and Grounding Requirements：To limit the effects of electromagnetic interference (EMI), use shielded twisted-pair cable for all RTD or resistance inputs. The shield must be grounded at only one end, typically at the SLC chassis ground, to prevent ground loops.
Sensor Failure Diagnostics：The 1746-NR4 provides continuous diagnostics for open-circuit and short-circuit conditions. When a failure is detected, the module sets the corresponding error bit in the channel status word, which can be configured to drive the input data to a safe state (upscale or downscale).
What is the input type and voltage range for the 1746-IV32 module?
The 1746-IV32 is a 24V DC sourcing input module with an operating voltage range of 15 to 30V DC at 50 °C (122 °F).
What type of connector is required for field wiring on the 1746-IV32?
The module uses a 40-pin telecommunication-style connector, specifically the 1746-N3 or equivalent, to interface with field devices.
What is the maximum backplane current consumption for the 1746-IV32?
The 1746-IV32 consumes a maximum of 0.170 A from the 5V DC backplane and 0 A from the 24V DC backplane.
What are the nominal and maximum signal delay times for the 1746-IV32?
The maximum signal delay for both "off-to-on" and "on-to-off" transitions is 3.0 ms (nominal 2.0 ms) under standard operating conditions.
How many input points are grouped together on the 1746-IV32 module?
The 32 input points are divided into two isolated groups of 16 points each, with each group having its own common (VDC 0 and VDC 1).
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