RXN 21E12BD Telemecanique

RXN 21E12BD Telemecanique Programmable controller

Brand：Telemecanique Model number：RXN 21E12BD

Country of origin: France Product weight：0.55kg

HS code：8517623990

Product Details：

Product Dimensions：

The Telemecanique RXN 21E12BD is a type of miniature plug-in relay formerly manufactured by Telemecanique, which is now a brand under Schneider Electric. These relays are part of the Zelio Relay RXN series (also known as the Zelio Relay Interface series) and are commonly used for interfacing, coupling, and basic switching applications in automation systems.

Product Specifications

Product Type: Miniature Plug-in Relay
Series: Zelio Relay RXN (or R-Series)
Coil Voltage: $24 \text{ V DC}$ (This is indicated by the 'BD' suffix in the part number)
Contact Configuration: $2 \text{ C/O}$ (Changeover) or DPDT (Double Pole Double Throw). This means the relay has two sets of contacts, each capable of switching between two positions.
Maximum Switching Voltage: Typically $250 \text{ V AC}$ or $250 \text{ V DC}$ (refer to full datasheet for specific ratings)
Conventional Thermal Current: Usually $5 \text{ A}$ or $6 \text{ A}$ (rated current)
Terminal Type: Plug-in/Pin type (for socket mounting)
Mechanical Durability: High mechanical life, typically several million operating cycles.
Dimensions: Miniature industrial design.
Status Indication: Often includes a mechanical or LED indicator for the coil status.

Product Advantages

Compact Design: The miniature size of the RXN series allows for high-density mounting in electrical panels, optimizing cabinet space.
Easy Replacement: As a plug-in relay, it can be quickly and easily replaced without disturbing the wiring, significantly reducing maintenance downtime.
Versatile Switching: The $2 \text{ C/O}$ (DPDT) contact configuration provides flexibility for various control circuits, enabling coupling, isolation, and switching functions.
DC Coil Compatibility: The $24 \text{ V DC}$ coil voltage is standard in most industrial control systems, making integration straightforward.
Built-in Features: Many models in this series include features like a lockable test button for manual operation and an LED indicator for quick status diagnosis.

Important Considerations (Precautions)

Socket Compatibility: The RXN 21E12BD must be used with the correct compatible socket (e.g., RXZ series socket) that matches its pin configuration. Using an incorrect socket can damage the relay or prevent proper function.
Coil Voltage: Ensure the control voltage supplied to the coil is precisely $24 \text{ V DC}$ . Applying an incorrect voltage (AC or different DC voltage) will cause the relay to malfunction or be permanently damaged.
Contact Rating: Never exceed the specified maximum current ( $5 \text{ A}$ or $6 \text{ A}$ ) and voltage ratings for the contacts. Exceeding these limits can lead to contact welding, premature failure, or fire.
Inductive Loads: When switching highly inductive loads (like motors or large solenoids), use appropriate contact protection circuits (such as snubbers or diodes) to minimize arcing and extend the contact life.
Environment: Install the relay and its socket within an enclosure that protects it from excessive dust, moisture, and vibration, as relays are sensitive components.

Product Applications

The RXN 21E12BD relay is primarily used as an interface or coupling relay in industrial automation and control applications. It acts as an intermediary device between control signals and power circuits.

Typical applications include:

Signal Isolation: Providing electrical isolation between sensitive control circuits (like PLCs) and higher power or noisy field circuits.
Contact Multiplication: Using a single output from a PLC to drive multiple control circuits via the relay's multiple contacts.
Interfacing: Coupling low-power signals from a PLC or control card to switch higher current loads, like small solenoids, indicator lights, or contactor coils.
Control Panel Logic: Used for implementing basic logic functions, timing, and interlocking in electrical control panels.
Basic Equipment Control: Switching small loads in machinery, HVAC systems, and building automation.

RXN 21E12BD Telemecanique

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