PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1794-IV32 is a 24 VDC Digital Input Module for the FLEX I/O platform. This high-density discrete module provides thirty-two current sourcing input channels. It accepts a nominal input signal voltage of 24 VDC. The module integrates binary field devices such as switches, auxiliary contacts, and sensors. Data transfers through the FlexBus backplane to a FLEX I/O communication adapter. Host systems include ControlLogix, CompactLogix, PLC-5, and SLC 500 controllers.
The module operates across an input voltage range between 19.2 VDC and 31.2 VDC. It draws 40 mA of backplane current at 5 VDC from the FlexBus. Thirty-two yellow status indicators provide visual feedback for individual channel states. An integrated keyswitch ensures proper positioning on a 1794 series mounting base. Technicians align the alignment bar and groove before engaging the latching mechanism. The module mounts on a DIN rail for chassis ground connection.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Product Line | Flex I/O 1794 |
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| UPC | 612598403257 |
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| Weight | 0.56 lbs (0.26 kg) |
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| Module Type | 24 VDC Discrete input module |
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| No. of Channels | thirty-Two (32) |
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| Status indicators | 32 yellow status indicator |
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| No. of Inputs | Thirty-Two (32) |
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| Wiring configuration | Sourcing |
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| Maximum pollution level | Pollution Degree 2 |
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| Nominal input voltage | 24 VDC |
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| Maximum overvoltage level | Overvoltage Category II |
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| Input voltage, nominal | 24 VDC |
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| Minimum On-state voltage | 19.2 VDC |
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| Mounting base | 1794 Mounting Base |
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| Input voltage range | 19.2-31.2 VDC |
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| Maximum On-state voltage | 31.2 VDC |
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| Altitude | 6562 feet |
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| On-state current, min | 2.0 mA |
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| Input Filter times | 0.25 ms; 0.5 ms; 1 ms; 2 ms; 4 ms; 8 ms; 16 ms and 32 ms |
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| On-state current, nom | 4.1 mA @ 24V DC |
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| Backplane Current draw @ 5.1V | 40 mA |
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| On-state current, max | 6.0 mA |
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| Compatible Controllers | PLC5; SLC 500; CompactLogix; ControlLogix |
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| Input filter time | 0.5 ms; 1 ms; 2 ms; 4 ms; 8 ms; 16 ms; and 32 ms |
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| Isolation voltage | 50V (continuous), Basic Insulation Type Type tested @ 850V DC for 60 s, between field side and system |
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| FlexBus current draw | 40 mA @ 5VDC |
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| Installation | DIN Rail |
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TECHNICAL INFORMATION
Features
- Thirty-two discrete current sourcing input channels.
- Configurable input filter times from 0.25 ms up to 32 ms.
- Thirty-two yellow status indicators display individual channel operation.
- Low backplane current draw of 40 mA at 5 VDC.
- Integrated keyswitch prevents incorrect base alignment during installation.
- Basic insulation rated for 50 V continuous isolation between field and system.
TECHNICAL INFORMATION
Applications
- Interfacing binary field devices such as pushbuttons and limit switches.
- Monitoring auxiliary contacts in motor starter panels.
- Connecting discrete 24 VDC sensors in high-density distributed architectures.
TECHNICAL INFORMATION
Connections / Interfaces
- Connects directly to the FLEX I/O FlexBus backplane.
- Mounts onto 1794 series terminal bases for field wiring termination.
- Provides thirty-two sourcing discrete input connections.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the assembly on a zinc-plated chromate-passivated steel DIN rail.
- Set the module keyswitch to match the designated base position.
- Align the groove with the terminal base alignment bar.
- Press firmly until the latching mechanism locks into place.
- Operate exclusively in indoor Pollution Degree 2 environments.
- Clean only with a soft dry anti-static cloth.
TECHNICAL INFORMATION
Configuration Guidelines
- Select input filter times between 0.25 ms and 32 ms.
- Use higher filter times to debounce noisy mechanical contacts.
- The factory default input filter time is 0.25 ms.
- Map input data bits through the FLEX I/O communication adapter.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley 1794 series terminal mounting bases.
- Interactions occur through FLEX I/O communication adapters.
- Communicates with ControlLogix and CompactLogix controllers.
- Supports legacy PLC-5 and SLC 500 control architectures.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley 1794 series terminal mounting bases. Interactions occur through FLEX I/O communication adapters. Communicates with ControlLogix and CompactLogix controllers. Supports legacy PLC-5 and SLC 500 control architectures.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What wiring configuration does the 1794-IV32 use?
The 1794-IV32 uses a sourcing input circuit configuration. Connected field devices sink current to ground.
What are the input voltage and current ratings?
Nominal input voltage is 24 VDC. Operating voltage ranges from 19.2 to 31.2 VDC with 4.1 mA nominal current.
Which host controllers support the 1794-IV32 module?
It operates in FLEX I/O systems linked to ControlLogix, CompactLogix, PLC-5, and SLC 500 controllers.
What input filter times can be configured?
Selectable filter times are 0.25, 0.5, 1, 2, 4, 8, 16, and 32 ms.
