PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1746-OBP8 is an SLC 500 high current sourcing DC output module. This unit provides eight current-sourcing outputs arranged in two groups. Each group contains four output points. The module operates across a voltage range of 20.4 to 26.4 V DC. It consumes 0.135 A backplane current at 5 V DC. The hardware mounts directly into a single slot of an SLC 500 chassis.
Each output point supports 2.0 A continuous current at 60 degrees Celsius. Total continuous current reaches 8.0 A per module at 60 degrees Celsius. Surge current rating is 4 A for 10 ms. Resistive load signal delay is 1.0 ms for turn-on and 2.0 ms for turn-off. Maximum on-state voltage drop is 1 V at 2 A load current. Total power dissipation reaches 3.08 W maximum.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| Product Line | SLC 500 |
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| UPC | 662468600903 |
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| Weight | 0.56 lbs (0.26 kg) |
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| Module Type | Digital DC Output Module |
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| Outputs | 8 |
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| Voltage Range | 20.4-26.4 Volts DC Source |
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| No. of Outputs | Eight (8) |
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| No. of Groups | 2 |
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| Points per group | 4 |
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| Signal Delay | on = 1.0 ms / off = 2.0 ms |
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| Applications | High Current |
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| Current/Output | 2.0A at 60°C |
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| Step Response | 60 milliseconds in, 2.5 milliseconds out |
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| Current/Module | 8.0A at 0° to 60°C |
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| Backplane Current (5 Volts) | 0.135A milliamps |
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| Recommended signal wires | Max 2 mm. sq. (14 AWG) |
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TECHNICAL INFORMATION
Features
- Provides eight current-sourcing DC outputs arranged in two groups of four points.
- Delivers 2.0 A continuous current per point at 60 degrees Celsius.
- Supports a total continuous current capacity of 8.0 A per module.
- Operates across an external DC voltage range of 20.4 to 26.4 V DC.
- Provides fast switching with 1.0 ms turn-on and 2.0 ms turn-off delay.
- Includes an isolation voltage rating of 1500 V.
TECHNICAL INFORMATION
Applications
- Driving 24 V DC actuators, solenoids, and motorized equipment.
- Powering visual indicators including pilot lamps and alarm annunciators.
- Actuating audible signaling devices such as horns, sirens, and buzzers.
- Energizing interposing relay coils to control external AC voltage loads.
TECHNICAL INFORMATION
Connections / Interfaces
- Accepts signal wiring up to 14 AWG (2 mm²).
- Connects directly to the SLC 500 backplane via chassis slot contacts.
- Requires an external DC power supply to power connected field loads.
TECHNICAL INFORMATION
Installation Guidelines
- Install the module directly into any available SLC 500 chassis slot.
- Disconnect chassis power and external field power before inserting or removing hardware.
- Route field wiring using conductors up to 14 AWG.
- Maintain ambient operating temperatures between 0 and 60 degrees Celsius.
TECHNICAL INFORMATION
Configuration Guidelines
- Assign the 1746-OBP8 catalog number in controller configuration software.
- Confirm that total continuous load current across all points does not exceed 8.0 A.
- Verify external field power supply supplies between 20.4 and 26.4 V DC.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley SLC 500 modular and fixed controller systems.
- Functions in local processor chassis, expansion racks, or remote I/O configurations.
- Requires an external 24 V DC power source to power field outputs.
TECHNICAL INFORMATION
Compliance and Certifications
- NEMA standard ICS 2-230 noise immunity
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley SLC 500 modular and fixed controller systems. Functions in local processor chassis, expansion racks, or remote I/O configurations. Requires an external 24 V DC power source to power field outputs.
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 continuous output current rating of the 1746-OBP8?
Each point delivers 2.0 A at 60 degrees Celsius. Total module capacity is 8.0 A.
Can the Allen-Bradley 1746-OBP8 control AC loads?
Yes. Connect interposing relays to the DC outputs to switch external AC loads.
Does the 1746-OBP8 require external power?
Yes. An external 24 V DC power supply is required to drive the field outputs.
