PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1746-OW8 is an eight-channel SLC 500 relay output module. It delivers electromechanical switching across two isolated groups of four normally open channels. The module operates across voltage categories from 5 to 125 VDC and 5 to 265 VAC. This dual-voltage capability allows mixed voltage control without interposing relays.
The unit draws 85 mA at 5V DC and 90 mA at 24V DC from the backplane. It supports continuous currents up to 16 A AC per module and 8 A per group. Each circuit handles 1.5 A at 120 VAC and 1.2 A at 24 VDC. Signal delay for on and off transitions is 10 milliseconds under maximum resistive load.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| Product Line | SLC 500 |
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| GTIN | 10662073578908 |
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| Weight | 0.69 lbs (0.31 kg) |
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| Module Type | Digital Contact Output Module |
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| Outputs | 8 |
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| Operating Voltage | 5-265 Volt AC or 5-125 Volts DC |
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| No. of groups | 2 |
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| Points per group | 4 |
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| Output Types | N.O. Relay Contact |
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| Applications | Relay Contact Outputs (4 per Common) |
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| Current/Output (120 VAC) | 1.5 amps |
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| Step Response | 60 milliseconds in, 2.5 milliseconds out |
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| Current/Output (24VDC) | 1.2 amps |
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| Backplane Current | 0.85-0.9 A |
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| Signal delay, max resistive load | On = 10.0 ms Off = 10.0 ms |
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| Output Type | Relay Contact, Normally Open (N.O.) — Silver Cadmium with Gold overlay |
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| Number of Output Points | 8 (2 groups of 4 per common) |
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| Output Operating Voltage (AC) | 5–265V AC (47–63 Hz) |
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| Output Operating Voltage (DC) | 5–125V DC |
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| Continuous Current per Module (Max) | 16A AC total (8A per common) |
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| Backplane Current Consumption | 85 mA @ 5V DC; 90 mA @ 24V DC |
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| Signal Delay (Max Resistive Load) | 10 ms ON; 10 ms OFF |
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| Off-State Leakage Current | 0 mA |
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| Minimum Load Current | 10 mA @ 5V DC |
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| Maximum Heat Dissipation | 3.70 W total (0.138 W per point; 2.59 W minimum) |
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| Isolation | Backplane: 1500V AC; Communication Circuits: 500V DC |
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| Operating Temperature | -25–60°C (-13–140°F) |
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| Storage Temperature | -40–85°C (-40–185°F) |
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| Relative Humidity | 5–95% (non-condensing) |
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| Vibration (Operating) | 2g @ 10–500 Hz |
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| Shock (Operating) | 30g |
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| Certifications | CSA Class 1, Division 2; UL; CE |
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| Terminal Block | Removable, color-coded |
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| Mounting | 1746 Chassis (single slot, back-panel mount) |
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TECHNICAL INFORMATION
Features
- Eight normally open relay output channels arranged in two isolated groups of four.
- Wide operating voltage range covering 5 to 265 VAC and 5 to 125 VDC.
- Continuous current handling up to 16 A AC total and 8 A per group.
- Maximum heat dissipation rated at 3.7 Watts total with 0.138 Watts per point.
- Backplane current consumption of 85 mA at 5V DC and 90 mA at 24V DC.
TECHNICAL INFORMATION
Applications
- AC and DC discrete actuator switching in SLC 500 automation systems.
- Multi-voltage control circuits requiring isolation between channel groups.
- Remote I/O discrete switching without interposing control relays.
TECHNICAL INFORMATION
Connections / Interfaces
- Removable color-coded terminal block for direct field wiring.
- Direct backplane edge connector for single-slot 1746 chassis interface.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module into a single slot of an SLC 500 1746 chassis.
- Operate the unit in an environment with pollution degree no higher than Pollution 2.
- Install inside an enclosure accessible only by using a tool.
- Disconnect power before servicing to prevent dangerous electrical arcing.
TECHNICAL INFORMATION
Configuration Guidelines
- Assign module parameters within the SLC 500 processor I/O configuration table.
- Add surge suppression across inductive loads to extend relay contact life.
TECHNICAL INFORMATION
Compatibility
- SLC 5/01, SLC 5/02, SLC 5/03, SLC 5/04, and SLC 5/05 modular controllers.
- Fixed and modular SLC 500 chassis hardware platforms.
- SLC 500 remote I/O chassis assemblies using standard communication adapters.
TECHNICAL INFORMATION
Compliance and Certifications
- CSA Class 1, Division 2
- UL
- CE
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSSLC 5/01, SLC 5/02, SLC 5/03, SLC 5/04, and SLC 5/05 modular controllers. Fixed and modular SLC 500 chassis hardware platforms. SLC 500 remote I/O chassis assemblies using standard communication adapters.
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
Which controllers support the Allen-Bradley 1746-OW8 output module?
The module works with Allen-Bradley SLC 5/01, SLC 5/02, SLC 5/03, SLC 5/04, and SLC 5/05 processors. It also mounts in remote I/O chassis.
What are the output ratings for the 1746-OW8 contact channels?
It switches 5 to 265 VAC and 5 to 125 VDC. Individual channels support 1.5 A at 120 VAC and 1.2 A at 24 VDC.
What is the reference price for the 1746-OW8 module?
Verified market pricing lists the module around 87.00 USD for refurbished condition. These figures are indicative market reference pricing only and are not a final quotation.
