PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1794-IB16 is a 16-channel sinking digital input module for the FLEX I/O system. It interfaces field sensors and switches with programmable automation controllers across industrial networks. The unit accepts a nominal input voltage of 24 volts DC. Its acceptable operating voltage range spans from 10 volts DC to 31.2 volts DC. Each channel presents a nominal input impedance of 4.6 kiloohms.
The module requires a minimum on-state voltage of 10 volts DC at 2 milliamperes. Nominal on-state current reaches 8 milliamperes, while peak current limits to 12 milliamperes at maximum voltage. An input drops to an off-state below 5 volts DC and 1.5 milliamperes. It mounts onto a compatible FLEX I/O terminal base on standard DIN rail or panel surfaces. The assembly provides 50 volts continuous isolation with basic insulation between field circuits and the backplane.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Continuous Isolation Voltage | 50 Volts with basic insulation |
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| Input Type | Sinking Current Inputs |
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| Maximum Off-State Current | 1.5 mA |
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| Maximum Off-State Voltage | 5V DC |
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| Maximum On-State Current | 12 mA |
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| Maximum On-State Voltage | 31.2V DC |
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| Minimum On-State Current | 2 mA |
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| Minimum On-State Voltage | 10V DC |
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| Nominal Input Impedance | 4.6 kiloohms |
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| Nominal On-State Current | 8 mA |
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| Nominal On-State Voltage | 24V DC |
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| Number of Inputs | 16 Inputs |
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| UPC | 612598137787 |
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| Weight | 0.44 lbs (0.20 kg) |
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| Number of Digital Inputs | 16 sinking inputs |
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| Input Type / Voltage | 24 V DC sinking (nominal), 10 - 31.2 V DC input range |
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| Input On-State / Off-State Current | Up to 12 mA (on-state); min. off-state current 2 mA |
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| Power Dissipation (max) | 6.1 W at 31.2 V DC |
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| Operating Temperature | 0 - 55 °C (32 - 131 °F) |
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| Mounting / System Compatibility | DIN-rail or panel mounting; requires compatible FLEX I/O terminal base (e.g. 1794-TB3/TB3S) and I/O adapter module (EtherNet/IP, DeviceNet, ControlNet, etc.) |
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TECHNICAL INFORMATION
Features
- Offers 16 current-sinking digital input channels for 24V DC discrete sensor monitoring.
- Accommodates an operating input voltage range spanning 10V DC to 31.2V DC.
- Maintains an input impedance rating of 4.6 kiloohms to preserve signal integrity.
- Draws 30 mA Flexbus current at 5V DC from the communication adapter.
- Features a maximum power dissipation of 6.1 W at 31.2V DC input.
- Provides 50V continuous basic insulation between field wiring and internal logic.
TECHNICAL INFORMATION
Applications
- Discrete sensing from 24V DC proximity sensors, limit switches, and pushbutton stations.
- Distributed machine automation requiring compact DIN-rail input expansion across industrial facilities.
- Manufacturing process monitoring connected via FLEX I/O network adapters like EtherNet/IP or ControlNet.
TECHNICAL INFORMATION
Connections / Interfaces
- Connects to the system backplane through a 1794 terminal base unit.
- Receives logic power via the Flexbus connection drawing 30 mA at 5V DC.
- Terminates 16 field input points on the selected screw or spring-clamp terminal base.
TECHNICAL INFORMATION
Installation Guidelines
- Snap the module directly onto a compatible FLEX I/O terminal base such as 1794-TB3 or 1794-TB3S.
- Mount the assembled base and module on a standard 35 mm DIN rail or panel surface.
- Ensure ambient operating temperatures remain between 0 and 55 degrees Celsius during continuous operation.
- Verify proper field wiring polarity for sinking inputs before applying power to the terminal base.
TECHNICAL INFORMATION
Compatibility
- Requires a compatible FLEX I/O terminal base unit such as the 1794-TB3 or 1794-TB3S.
- Operates with FLEX I/O communication adapters including EtherNet/IP, ControlNet, and DeviceNet models.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSRequires a compatible FLEX I/O terminal base unit such as the 1794-TB3 or 1794-TB3S. Operates with FLEX I/O communication adapters including EtherNet/IP, ControlNet, and DeviceNet models.
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 type of input signals does the 1794-IB16 accept?
The module accepts 16 sinking current inputs operating at a nominal voltage of 24 volts DC.
What hardware is required to install the 1794-IB16 module?
It requires a compatible FLEX I/O terminal base such as 1794-TB3 and a network communication adapter.
What are the on-state operating limits for the 1794-IB16 inputs?
The on-state voltage ranges from 10 to 31.2 volts DC with current between 2 and 12 milliamperes.
What is the market reference price for the 1794-IB16?
Observed market reference pricing is 42.00 USD. This is an indicative market reference only, not a final quotation.
