PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1746-IO12 is a SLC 500 digital I/O combination module. It provides six 120V AC input circuits and six normally-open Form A relay outputs. The unit occupies a single slot in any standard SLC 500 local or expansion chassis. It operates within an input voltage window from 85 to 132V AC. The relay output contacts support 5 to 265V AC and 5 to 125V DC. This dual-function design saves rack space by combining inputs and outputs in one chassis slot.
Backplane current draw measures 0.090A at 5V DC and 0.070A at 24V DC. Each relay contact delivers a continuous rating of 2.0A with aggregate module limit of 8.0A. Nominal continuous current ratings are 1.5A at 120V AC and 1.2A at 24V DC. Optical isolation reaches 1500V between I/O terminals and system control logic circuits. Total module heat dissipation is 4.60W under normal operating conditions. Operating temperature spans from 0 to 60 degrees Celsius in non-condensing industrial environments.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Applications | Combination 120 Volts AC I/O |
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| Area Classification | Certified for Class 1, Division 2 hazardous location by CSA. |
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| Backplane Current | 70-90 mA |
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| Category | PLCs |
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| Continuous Current per module | 8.0 A |
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| Current/Output | (24VDC)1.2 amps; (120 VAC)1.5 amps |
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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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| Input Operating Voltage | 120 VAC Volts AC |
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| Inputs | Six (6) 120VAC inputs |
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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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| Output Operating Voltage | 24-125 VDC; 120 - 240 VAC |
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| Outputs | Six (6) Form A Contacts |
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| Signal delay | 35-45 milliseconds |
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| Slot Width | 1 |
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| UPC | 662073902690 |
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| Weight | 1.19 lbs (0.54 kg) |
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TECHNICAL INFORMATION
Features
- Six 120V AC input channels with operating voltage from 85 to 132V AC.
- Six Form A normally-open mechanical relay contact outputs.
- Maximum continuous current rating of 2.0A per output point.
- Total continuous current limit of 8.0A across the entire module.
- Electro-optical isolation rated at 1500V between I/O wiring and backplane logic.
- Signal response delay specified between 35 milliseconds ON and 45 milliseconds OFF.
- Low heat dissipation with aggregate module thermal load of 4.60W.
TECHNICAL INFORMATION
Applications
- Discrete control systems requiring mixed AC sensing and contact output switching.
- SLC 500 chassis installations with limited slot availability.
- Interfacing field pilot devices, pushbuttons, limit switches, and motor starters.
TECHNICAL INFORMATION
Connections / Interfaces
- Occupies one slot in standard Allen-Bradley SLC 500 rack assemblies.
- Field connections wire to terminal screws for six inputs and six relay contacts.
- Draws 90 mA backplane current at 5V DC and 70 mA at 24V DC.
TECHNICAL INFORMATION
Installation Guidelines
- De-energize chassis power before inserting or removing the module from the rack.
- Install in any chassis slot except the dedicated slot zero processor location.
- Verify that total chassis backplane power supplies satisfy the 90 mA and 70 mA draws.
- Avoid exposing the assembly to aggressive chemicals to prevent contact degradation.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley SLC 500 fixed and modular hardware platforms.
- Mounts directly in SLC 500 local racks and expansion chassis.
- Functions alongside other digital, analog, and specialty SLC 500 I/O modules.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- Direct replacement requires an identical 1746-IO12 module without software reconfiguration.
- Ensure system power is fully isolated before replacing an existing unit in the field.
TECHNICAL INFORMATION
Compliance and Certifications
- CSA certified for Class 1, Division 2 hazardous locations.
- NEMA standard ICS 2-230 noise immunity rating.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley SLC 500 fixed and modular hardware platforms. Mounts directly in SLC 500 local racks and expansion chassis. Functions alongside other digital, analog, and specialty SLC 500 I/O modules.
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 I/O configuration does the 1746-IO12 module provide?
The module provides six 120V AC inputs and six Form A normally-open relay contact outputs.
What are the backplane current requirements for the 1746-IO12?
The 1746-IO12 consumes 90 mA at 5V DC and 70 mA at 24V DC from the backplane.
Can the 1746-IO12 be installed in slot zero of an SLC chassis?
No, slot zero is reserved exclusively for the SLC 500 processor module.
What is the maximum continuous current rating per relay contact?
Each relay output supports up to 2.0A continuous current, with an 8.0A module maximum.
