Description

Brief Product Description

The Allen-Bradley 1771-OW is a high-versatility relay output module featuring eight selectable channels for the PLC-5 platform. It allows users to control both AC and DC loads with individual contact configuration, providing a rugged interface for diverse industrial switching requirements.

Product Description

Versatile Load Switching and Configuration

The Allen-Bradley 1771-OW serves as a flexible power interface for PLC-5 control architectures. This module provides eight relay outputs, which engineers can individually configure for either Normally Open (N.O.) or Normally Closed (N.C.) operation. Because the module organizes these channels into four isolated groups, it enables the simultaneous control of multiple independent power circuits within a single slot. This design significantly reduces the need for external interposing relays when managing diverse field devices like motor starters, solenoid valves, and indicator lights.

Enhanced Electrical Isolation and Protection

Safety and system integrity remain core priorities for the 1771-OW module. It features rigorous galvanic isolation between the output contacts and the sensitive backplane logic, shielding the PLC processor from voltage spikes and electromagnetic interference generated by field loads. The module effectively manages wide voltage ranges, supporting 24–138V AC or 24–125V DC. Furthermore, each relay contact handles up to 1 Amp of continuous current, ensuring dependable performance even when driving resistive or inductive loads in heavy-duty cycles.

Seamless Integration and Maintenance

Designed for the legacy 1771 I/O chassis, the Allen-Bradley 1771-OW simplifies installation through a standardized keying system. Proper alignment is ensured by placing keying bands between pins 4 and 6, and pins 32 and 34. The module draws a maximum of 700mA from the backplane, making it compatible with various PLC-5 power supplies. Its robust mechanical construction allows for continuous operation in temperatures ranging from 0°C to 60°C. These features, combined with the modular nature of the 1771 series, facilitate rapid hot-swapping and routine maintenance, which minimizes downtime in mission-critical production environments.

Technical Specifications