The ABB Bailey RLM01 is a robust relay output module designed for the Bailey INFI 90 and Symphony Harmony distributed control systems (DCS). This module provides reliable dry-contact relay outputs to control high-power field devices such as motors, valves, pumps, and alarms in industrial automation applications.

Key Features

16 Form C Relay Outputs: Each channel includes normally open (NO) and normally closed (NC) contacts for flexible configuration.

High Load Capacity: Supports up to 5A @ 250VAC or 30VDC per channel, enabling direct control of industrial loads.

Optical Isolation: Ensures electrical separation between the control system and field devices, protecting sensitive electronics from voltage spikes and noise.

LED Status Indicators: Each channel features LEDs for real-time monitoring of output status.

Hot-Swappable Design: Allows replacement without system shutdown in redundant configurations.

DIN-Rail Mounting: Facilitates easy installation and integration into control cabinets.

Applications

Power Generation Plants

Oil and Gas Refineries

Water Treatment Facilities

Chemical Processing Plants

Manufacturing Automation

Compatibility

Compatible with Bailey INFI 90, Symphony Harmony, and Network 90 systems.

Works seamlessly with controllers like the NIMP and other I/O modules.

Technical Specifications

Input Voltage: 5VDC (backplane power).

Contact Rating: 5A resistive @ 250VAC/30VDC.

Isolation: 1500V between field and logic sides.

Operating Temperature: 0°C to 60°C.

Certifications: UL, CE, and ATEX compliant (for hazardous environments).

Status and Availability

The RLM01 is now discontinued by ABB but remains available through certified suppliers of refurbished industrial automation components. Refurbished units are typically tested, cleaned, and backed by warranties to ensure reliability.

Why Choose the RLM01?

Proven Reliability: Designed for 24/7 operation in harsh environments.

Easy Integration: Fully compatible with Bailey systems, reducing implementation time.

Maintenance-Friendly: Hot-swappable and front-accessible for minimal downtime.

For industries relying on legacy Bailey systems, the RLM01 offers a cost-effective solution for maintaining operational efficiency. When sourcing, ensure compatibility with existing configurations and prioritize suppliers offering tested units with technical support.

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ABB Bailey RLM01 Relay Output Module