PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1746-IA8 is an 8-channel digital AC input module for the SLC 500 system. It provides discrete sensing for general-purpose alternating-current field devices in a single chassis slot. The unit operates within a nominal voltage range of 100 to 120V AC across 47 to 63 Hz. It accepts operating voltages between 85 and 132V AC. Status indicators show channel input conditions on the open-style front assembly.
This module draws 50 mA backplane current at 5V DC and consumes zero current at 24V DC. Nominal input current is 12 mA at 120V AC, with a maximum off-state current of 2 mA. Maximum off-state voltage is 30V AC, and peak inrush current reaches 0.8 A. Isolation ratings provide 1500V AC backplane protection and 500V DC communication circuit isolation. Operating temperatures range from 32 to 140 degrees Fahrenheit.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| UPC | 662073521204 |
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| Weight | 1.25 lbs (0.57 kg) |
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| Module Type | Digital AC Input Module |
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| Voltage Range | 85-132 Volts AC |
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| Inputs | 8 |
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| Backplane Current (5 Volts DC) | 50 milliamps |
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| Signal delay | 35 or 45 milliseconds |
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| Off State Current | 2 milliamps |
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| Slots | 1 |
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| I/O Connection | 1746-HT and 1746-HCA |
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| Step Response | 100 milliseconds in, 2.5 milliseconds out |
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TECHNICAL INFORMATION
Features
- Eight discrete input channels for 100 to 120V AC nominal field signals.
- Backplane current draw of 50 mA at 5V DC with no 24V DC load.
- Maximum signal ON delay of 35 ms and maximum OFF delay of 45 ms.
- Isolation rating of 1500V AC to the backplane and 500V DC to communication circuits.
- Front-panel status display for immediate input state verification.
TECHNICAL INFORMATION
Applications
- Monitoring 120V AC pushbuttons, selector switches, and limit switches.
- SLC 500 chassis expansion for discrete AC machine status inputs.
- General-purpose industrial sensing across 85 to 132V AC control loops.
TECHNICAL INFORMATION
Connections / Interfaces
- Compatible with 1746-HT and 1746-HCA wiring connectors.
- Direct backplane connection occupying a single SLC 500 chassis slot.
TECHNICAL INFORMATION
Installation Guidelines
- Insert the module into any available slot of an SLC 500 chassis.
- Secure field wiring using compatible 1746-HT or 1746-HCA terminal assemblies.
- Maintain ambient operating temperatures between 32 and 140 degrees Fahrenheit.
TECHNICAL INFORMATION
Configuration Guidelines
- Assign module addressing through SLC 500 programming software matching the slot position.
- Account for a 35 ms maximum ON delay and 45 ms maximum OFF delay in logic timing.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley SLC 500 chassis and processor racks.
- Supports 1746-HT and 1746-HCA wiring arm connections.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley SLC 500 chassis and processor racks. Supports 1746-HT and 1746-HCA wiring arm connections.
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 is the operating voltage range of the Allen-Bradley 1746-IA8?
The operating voltage range is 85 to 132V AC across a frequency band of 47 to 63 Hz.
How much backplane current does the 1746-IA8 consume?
The module requires 50 mA at 5V DC and consumes 0 mA from the 24V DC backplane supply.
What are the input signal propagation delays for the 1746-IA8?
The module exhibits a maximum signal ON delay of 35 ms and a maximum OFF delay of 45 ms.
