Allen-Bradley 1756-IV16 Sixteen-Point Sourcing DC Input Module
A 20-pin ControlLogix input module for sixteen sourcing-type DC signals, arranged as two isolated eight-point groups.
Product Profile
Allen-Bradley 1756-IV16 is a sixteen-point ControlLogix digital DC input module for 12/24 VDC sourcing input circuits.
The sixteen points are arranged as two groups of eight, with 250 V continuous isolation between the two groups. A compatible 20-pin removable terminal block and the field common arrangement must match the approved wiring design.
Rockwell Automation lists the product as active. Series, firmware, input filter settings, RTB identity and the actual sourcing-field circuit should be retained before an exchange.
Technical Data
System Role
Input record
Capture 1756-IV16, series, firmware, slot, RTB number, input filter choices and each controller tag.
1756-IV16
Verify sourcing polarity, group commons, field protection and de-energization before moving the terminal block.
Field proof
Exercise every point from the field device and confirm state, filter response, diagnostics and the associated machine permissive.
Compatibility
Sixteen sourcing inputs
The module reads sourcing-type field devices across sixteen ControlLogix points.
Grouped electrical separation
Two isolated banks of eight maintain the published boundary between input groups.
Configurable filtering context
The selected input filter contributes to the effective input delay and must be retained with the project.
Current product support
Active lifecycle status and current module profiles support a documented ControlLogix implementation.
Applications
Sourcing sensor interfaces
Monitoring compatible 12/24 VDC sensors and switches wired for the module input polarity.
Grouped discrete acquisition
Separating two eight-point field groups within the published isolation boundary.
ControlLogix maintenance
Replacing the exact input module while preserving RTB wiring, filters, tags and controller ownership.
About IndustryParts
https://www.industryparts.com/Documented handling for 1756-IV16
IndustryParts keeps the exact model, requested quantity, installed-system evidence and delivery record together so the proposed supply can be checked against the real application before dispatch.
FAQ
What polarity check is essential before installing 1756-IV16?
Confirm that the field devices and common wiring form the sourcing-input circuit required by this catalog number; a sinking-input design is not interchangeable.
What project information should accompany a 1756-IV16 request?
Provide the module series and firmware, chassis slot, 20-pin RTB identity, filter settings, tag list, field voltage and photographs of both input groups.
Does the 250 V rating on 1756-IV16 mean every input is isolated from every other input?
No. Rockwell specifies 250 V continuous isolation between two groups of eight, so the group wiring boundary remains important.
Why should filter settings be retained for 1756-IV16?
The effective input response includes the selected filter time in addition to the module delay, so a changed setting can alter machine sequence behavior.
What proves 1756-IV16 is correctly returned to service?
Operate all sixteen field inputs, check the two group commons, confirm controller tags and filter response, and verify every affected permissive and alarm.
