ALSTOM IR139-1

Description

Product Description

The ALSTOM IR139-1 is a critical interface relay module within Alstom’s extensive portfolio of industrial automation and control components. Designed as a robust electromechanical relay, the IR139-1 serves as a fundamental building block for signal amplification, electrical isolation, and load switching in control panels. Its primary function is to reliably convert low-power control signals from devices like PLCs or protection relays into actions capable of driving higher-power field equipment such as contactors, solenoid valves, and indicator lamps. Integrating the ALSTOM IR139-1 into a system design provides a proven and reliable method for circuit segregation and control. The consistent performance and compatibility of the IR139-1 make it a staple component for engineers maintaining and building systems within the Alstom ecosystem.

Product Parameters

• Manufacturer / Brand: Alstom

• Product Type: Industrial Interface Relay

• Model: IR139-1

• Contact Configuration: Typically features Form C (Changeover) contacts, providing one normally open (NO) and one normally closed (NC) contact per pole.

• Coil Voltage: Available in a range of standard control voltages (e.g., 24V DC, 48V DC, 110V AC, 230V AC). The specific voltage is a key part of the ordering code.

• Contact Rating: Rated for switching typical control circuit loads, often up to 10A at 250V AC or 30V DC, suitable for inductive loads like contactor coils.

• Mounting: Designed for quick and secure mounting on a standard 35mm DIN rail.

• Termination: Utilizes screw-clamp terminals for reliable and tool-friendly wire connection.

• Indication: Equipped with a mechanical flag or an LED to provide clear visual status indication (energized/de-energized).

• Isolation: Provides high electrical isolation between the coil and contact circuits for safety and noise immunity.

• Housing: Constructed with a transparent or semi-transparent dust cover for protection while allowing visibility of the internal mechanism and status indicator.

Advantages and Features

• High Reliability and Long Life: Engineered for millions of mechanical operations, ensuring dependable performance in demanding industrial cycles.

• Excellent Electrical Isolation: Strong isolation between control and load circuits protects sensitive electronic controllers from voltage spikes and transients originating in the field.

• Versatile Application: The Form C contact arrangement allows for a wide variety of circuit configurations, including logic inversion, simple interlocking, and dual-state signaling.

• Easy Installation and Maintenance: The DIN-rail mounting and clear terminal numbering simplify wiring and panel layout. The transparent cover allows for quick visual inspection.

• Robust Construction: Built to withstand vibration, shock, and common industrial environmental contaminants.

• Clear Status Indication: Instant visual feedback on the relay’s state aids in troubleshooting and confirms correct system operation.

Application Cases in Key Fields

• Industrial Machine Control: Used in PLC cabinets to interface 24V DC digital outputs with 230V AC contactor coils for motor starters, pumps, and conveyor drives.

• Power System Protection & Control: Employed in substation relay panels to amplify trip/close signals from numerical protection relays to circuit breaker operating coils and to provide binary status feedback.

• Railway Signaling and Control: Found in interlocking and trackside control systems to provide isolated switching for signals, point machines, and level crossing barriers.

• Building Automation: Utilized in control panels for HVAC systems to interface low-voltage building management controllers with higher-power fan and damper actuators.

Comparison with Competing Products

Compared to similar interface relays from global manufacturers like Siemens (REL series), Phoenix Contact (PLC-RSC series), or Schneider Electric (RXL series), the ALSTOM IR139-1 offers functionally equivalent performance in terms of contact rating, isolation, and durability. Its primary distinction is its established presence in specifications for projects and systems originally designed around Alstom components. Competing products may offer slightly different form factors, additional accessories (like suppressors), or broader global availability. However, for maintaining legacy systems, ensuring perfect mechanical compatibility in existing panels, or adhering to project specifications that list Alstom parts, the ALSTOM IR139-1 is the direct and specified replacement, minimizing integration risk.

Selection Suggestions and Precautions

• Verify Coil Voltage Precisely: The most critical selection parameter is the coil voltage. Ensure the specified voltage (DC or AC) matches your control circuit supply exactly.

• Check Contact Load Requirements: Confirm that the relay’s contact rating (amperage and voltage) is suitable for the inrush and steady-state current of the load you are switching, especially for inductive loads.

• Consider the Environment: For applications with high vibration or dust, ensure the relay’s construction meets the environmental demands. The IR139-1 is generally robust for standard industrial use.

• Plan for Heat Dissipation: When mounting multiple relays in a confined space, allow for adequate airflow to prevent excessive heat buildup.

• Use Correct Wiring Practices: Follow the terminal diagram precisely. Use ferrules on stranded wires for optimal connection in the screw-clamp terminals.

• Source from Authorized Channels: To guarantee authenticity, correct specifications, and reliability, procure the ALSTOM IR139-1 from authorized distributors or reputable automation parts suppliers.

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