PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1746-IO8 is an SLC 500 digital I/O combination module. This unit provides four 120V AC inputs and four relay contact outputs. The input channels operate over an AC voltage range of 85 to 132V AC. The relay outputs feature Normally Open contact circuits with four points sharing a single common. The module fits into any slot of a 1746 I/O chassis, excluding slot 0.
The module draws backplane current of 0.03A at 5V DC and 0.025A at 24V DC. Total aggregate heat dissipation equals 3W during operation. Input points dissipate 0.27W, while each output point dissipates 0.133W. The relay contact circuits deliver 1.5A continuous current at 120V AC. They also deliver 1.2A continuous current per point at 24V DC. Both input and output circuits provide 35ms ON-state and 45ms OFF-state signal delays. Operating temperatures range from 0 to 60 degrees Celsius.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Applications | Combination 120 Volts AC I/O |
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| Category | PLCs |
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| Current/Output (120 VAC) | 1.5 amps |
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| Current/Output (24VDC) | 1.2 amps |
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| Inputs | 4 |
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| Module Type | Digital I/O Combination Module |
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| Operating Voltage | 85-132 Volts AC |
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| Outputs | 4 |
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| Signal delay | 35-45 milliseconds |
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| UPC | 662073521310 |
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| Weight | 1.50 lbs (0.68 kg) |
|---|
TECHNICAL INFORMATION
Features
- Provides four 120V AC inputs and four Normally Open relay contact outputs.
- Installs in any slot of a 1746 I/O chassis, except slot 0.
- Delivers continuous output current ratings of 1.5A at 120V AC and 1.2A at 24V DC.
- Draws backplane current of 0.03A at 5V DC and 0.025A at 24V DC.
- Operates with 35ms ON delay and 45ms OFF delay across inputs and outputs.
- Withstands 30G operational shock and 2.5G operational vibration from 57 to 200 Hz.
TECHNICAL INFORMATION
Applications
- Interfacing 120V AC field control sensors and switches with SLC 500 systems.
- Controlling discrete AC and DC actuators within rated contact load limits.
TECHNICAL INFORMATION
Connections / Interfaces
- Four 120V AC discrete input channels with a shared common.
- Four Normally Open relay contact circuits with four points per common.
TECHNICAL INFORMATION
Installation Guidelines
- Install the module into any available 1746 chassis slot except slot 0.
- Turn off chassis backplane power prior to module installation or removal.
- Maintain ambient operating temperatures between 0 and 60 degrees Celsius.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure the module in the chassis I/O configuration as a combination discrete module.
- Incorporate the 35ms ON delay and 45ms OFF delay into system response timing.
TECHNICAL INFORMATION
Compatibility
- Compatible with 1746 I/O chassis slots, excluding slot 0.
TECHNICAL INFORMATION
Compliance and Certifications
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with 1746 I/O chassis slots, excluding slot 0.
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
Can the 1746-IO8 module be installed in slot 0 of a 1746 chassis?
No. Slot 0 is reserved for processor modules. The 1746-IO8 installs in any other 1746 chassis slot.
What are the contact ratings for the 1746-IO8 relay outputs?
Relay contacts provide continuous current ratings of 1.5A at 120V AC and 1.2A at 24V DC.
What are the signal delay times for the 1746-IO8 module?
The module features a 35ms delay for ON states and a 45ms delay for OFF states.
