Product Overview
Machine builders and maintenance teams often run out of discrete outputs long before they run out of control logic. The Allen-Bradley 1762-OW8 solves that problem by adding eight AC/DC relay outputs to a MicroLogix 1100, 1200, or 1400 controller. This Bulletin 1762 expansion module carries two isolated groups of four channels each, so you can switch mixed AC and DC loads from one compact unit. It mounts on a DIN rail or directly on a panel, which simplifies both new builds and retrofit work.
Key Parameters That Drive Real Decisions
The 1762-OW8 accepts an operating voltage range of 5-265V AC and 5-125V DC, while its relay contact ratings cover 24-125 VDC and 120-240VAC. In practice, that spread lets one module drive pilot lamps, relay coils, and small contactors without external interposing relays. Each point handles up to 2.5 A continuously, with 8 A per common and 16 A per module. A 10 ms signal delay suits general discrete control, and 2.9 W total heat dissipation keeps panel thermal load low. The module draws power from the MicroLogix bus, so no separate field supply is needed for logic.
Comparison with Related Output Options
| Feature | 1762-OW8 (Relay) | Typical DC Output Module | Typical AC Output Module |
|---|---|---|---|
| Output type | AC/DC relay | DC solid state | AC solid state |
| Mixed AC/DC loads | Yes | No | No |
| Isolation per group | Two groups of four | Varies | Varies |
| Load flexibility | High | Low | Low |
Relay outputs cost more per point than solid-state types, but they remove the need to stock separate AC and DC modules. For mixed-voltage panels, that single-part strategy cuts spare inventory and speeds up repairs.
Where This Module Fits
Packaging and Material Handling
A MicroLogix 1400 running a case packer may need to fire solenoid valves, signal stack lights, and start a VFD. The 1762-OW8 handles all three from one expansion slot.
Water Treatment Panels
Pump alternation logic often drives AC contactors and DC alarm annunciators side by side. Two isolated groups keep those circuits separated.
Replacement and Upgrade Path
When an older relay output card fails, swapping in the 1762-OW8 restores eight points without redesigning the panel. Verify the host controller and slot spacing before ordering, then contact SpareTechPLC for availability and lead time.
Installation and Setup
Mount the module on EN 50 022 35 x 7.5 mm or 35 x 15 mm DIN rail, or use panel mounting in high-vibration areas. Keep the unit six modules away from the host power supply, and add DIN rail end anchors where shock is present. Connect the ribbon cable to the adjacent expansion module or base controller, and declare the module in the hardware configuration before download. Keep debris out of the housing during installation.
Maintenance and Reliability
Relay contacts wear with switching cycles, so inspect terminals periodically and follow the manufacturer’s safety manual. Keep the enclosure clean and dry with Pollution Degree 2 conditions. Because one module covers both AC and DC loads, you carry fewer spare part numbers, which lowers inventory cost and shortens downtime.
Compatibility and Integration
The 1762-OW8 works with MicroLogix 1100, 1200, and 1400 controllers as part of the Bulletin 1762 expansion I/O family. It communicates over the MicroLogix bus through the provided ribbon cable, so no network configuration is required beyond hardware setup. Confirm your controller’s expansion capacity before adding modules.
Selection Checklist
Before buying, confirm your controller model, available expansion slots, and the AC or DC voltage of each load. Check that per-point current stays within 2.5 A and that group totals stay under 8 A. SpareTechPLC stocks industrial automation parts and can confirm current lifecycle status and availability for this module.
Frequently Asked Questions
How many outputs does the 1762-OW8 provide?
It provides eight AC/DC relay outputs, arranged as two groups of four channels.
Can it switch both AC and DC loads?
Yes. The operating range covers 5-265V AC and 5-125V DC, with contact ratings of 24-125 VDC and 120-240VAC.
What is the maximum current per point?
Each point carries up to 2.5 A continuous, with 8 A per common and 16 A per module.
Which controllers support this module?
MicroLogix 1100, 1200, and 1400 controllers accept the 1762-OW8 as expansion I/O.
How far from the power supply should it be installed?
Install it six modules away from the host device’s power supply.
