Allen-Bradley 1769-OW8I is an upgraded 8-channel fully isolated mechanical relay output module for 1769 CompactLogix systems. Optimized based on standard 1769-OW8, it replaces group isolation with per-channel individual electrical isolation while retaining universal AC/DC dry-contact switching capability. It eliminates cross-channel interference and crosstalk issues, delivering higher stability and safety for high-noise industrial environments and multi-loop independent load control scenarios.

Core Technical Parameter Specifications

Channel Configuration：8 independent SPDT relay output channels

Core Upgrade Feature：Full per-channel individual isolation (OW8I exclusive)

Output Type：Mechanical relay dry contact switching (universal AC/DC)

Load Voltage Range：5–265VAC / 5–125VDC wide adaptive industrial voltage

Per-Point Rated Current：2A continuous resistive load current per channel

Total Module Current：Max 10A overall full-load current limit

Signal Response Speed：Max 10ms turn-on / 10ms turn-off delay

Off-State Leakage：0mA zero leakage for complete circuit cut-off

Insulation Grade：2596VDC reinforced per-channel isolation rating

Total Power Dissipation：2.83W stable full-load power consumption

Backplane Power Draw：120mA @ 5VDC low bus power consumption

Vibration & Shock Resistance：Industrial-grade anti-vibration and anti-shock structure

Operating Temperature：0℃ ~ +60℃ continuous industrial operation

Certifications：UL, CSA, CE global industrial safety compliance

Per-Channel Isolation Upgrade & Anti-Interference Advantage

The biggest difference between 1769-OW8I and standard 1769-OW8 is the independent single-channel isolation architecture. The ordinary OW8 adopts 4-point group isolation, which easily generates signal crosstalk and mutual interference when multiple loops work simultaneously. In contrast, every channel of 1769-OW8I is equipped with independent isolation circuits, completely isolating each load loop electrically.

This exclusive design effectively suppresses electromagnetic interference from inverters, high-power motors and frequency conversion equipment, ensuring stable independent operation of each channel without mutual impact. Zero off-state leakage achieves thorough circuit disconnection, avoiding residual voltage risks. Universal dry-contact design supports mixed AC and DC load switching, adapting to diversified on-site load types that solid-state single-type modules cannot match.

Independent Loop Control & High-Safety Retrofit Performance

AllenBradley 1769-OW8I features 8 fully independent control loops, allowing flexible separate configuration of each channel for different voltage and load parameters. It solves the pain point of loop mutual restriction in group-isolated modules, making it ideal for multi-loop independent equipment control and safety-critical circuit switching scenarios.

Fully compatible with all 1769 Compact I/O racks and CompactLogix L2x/L3x series controllers, it supports plug-and-play replacement for standard OW8 and ordinary relay modules without cabinet modification or program adjustment. The industrial-grade shock and vibration resistance structure adapts to harsh workshop environments, greatly reducing module failure rates. Combined with EtherNet/IP adapters, it builds high-safety, anti-interference remote multi-loop switching control for distributed automation systems.

Industrial Application Scenarios

AllenBradley 1769-OW8I is widely deployed in high-noise, high-safety and multi-independent-loop control scenarios, including chemical equipment auxiliary circuits, pharmaceutical production safety switching, packaging machinery multi-station independent control, environmental protection equipment power loop management and industrial safety protection circuit systems.

North American high-standard automation OEMs adopt OW8I for isolated loop design to improve equipment safety stability. Latin American heavy-industry factories deploy fully isolated relay modules to solve long-term crosstalk and signal jitter problems. European precision manufacturing projects rely on its per-channel isolation performance to ensure independent and reliable operation of multi-group load circuits.