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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RH2122-2KB40 |
| Alternative Part Number | 3RH21222KB40 |
| Manufacturer | Siemens |
| Category | Electrical Control Components |
| Type | Coupling Contactor Relay |
| Contact Configuration | 2 NO (Normally Open) + 2 NC (Normally Closed) |
| Rated Control Supply Voltage | 24 V DC |
| Operating Temperature Range | -25 to +60 °C |
| Mounting Type | DIN Rail |
| Terminal Type | Screw |
| Standards | IEC/EN 60947-5-1, UL, CSA |
| Safety Features | Positively driven operation according to IEC 60947-5-1 |
| Electrical Durability | High number of operating cycles |
| Mechanical Durability | Robust construction for long-term use |
| Commodity Code | 853649 |
| Special Characteristics | Suitable for use in safety applications with appropriate safety measures |
The Siemens 3RH2122-2KB40 is a coupling contactor relay designed to meet the rigorous demands of industrial automation and control systems. This compact and reliable component is part of the SIRIUS product family, renowned for its high-quality engineering and versatility in various applications.
Crafted for railway applications, the 3RH2122-2KB40 operates with a DC control supply voltage of 24V and features an integrated suppressor diode to protect against voltage spikes. It is engineered to function within a wide operating range factor of the magnet coil, from 0.7 to 1.25 times the rated value, ensuring stable performance even under fluctuating power conditions.
The relay is equipped with two normally open (NO) and one normally closed (NC) contacts, making it suitable for a variety of switching tasks. The spring-loaded terminal design ensures a secure and maintenance-free connection, which is crucial for the consistent operation of the relay over time.
With an insulation voltage rated at 690V and an installation altitude capability of up to 2000 meters above sea level, the 3RH2122-2KB40 is built to withstand challenging environmental conditions. Its robust construction provides a high degree of pollution resistance and is finger-safe, offering additional protection against electrical shock.
The contactor relay boasts an impressive mechanical operating cycle, with typical values reaching up to 30 million for the contactor itself and 10 million when auxiliary switch blocks are added. This highlights the component's durability and long service life, making it a cost-effective choice for long-term use.
The 3RH2122-2KB40 is also characterised by its shock resistance, capable of handling both rectangular and sine pulse shocks, ensuring reliability in environments subject to vibration and impact.
Overall, the Siemens 3RH2122-2KB40 coupling contactor relay is a high-performance and versatile component that provides reliable operation in a wide range of industrial settings. Its robust design and flexible features make it an excellent choice for those seeking a durable and efficient solution for their automation and control systems.
Commonly Asked Questions
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Frequently Asked Questions
What is the function of a coupling contactor relay?
A coupling contactor relay is used to switch a small control signal, which then controls a larger load within an electrical circuit. It's typically used in applications where interfacing between different control voltages or circuits is necessary.
Can this relay be used in safety-related applications?
Yes, the relay is designed with positively driven operation to IEC 60947-5-1, making it suitable for use in safety-related applications. It has specific safety-related data such as B10 value and failure rate that can be considered for such uses.
What are the contact configurations available for this relay?
This relay comes with a contact configuration of 2 normally open (NO) contacts and 1 normally closed (NC) contact, providing flexibility for various control circuit designs.
What is the rated control supply voltage for this relay?
The rated control supply voltage for this relay is DC 24V, with an operating range of 0.7 to 1.25 times the rated voltage, including an integrated suppressor diode.
What are the dimensions of this relay?
The exact dimensions can vary, but typically, a relay of this type would conform to the standard dimensions for a size S00 contactor. Please refer to the manufacturer's datasheet for precise measurements.
Is there any specific environmental consideration for the operation of this relay?
Yes, the relay can operate within an ambient temperature range of -40 to +70 degrees Celsius and can be stored in temperatures ranging from -55 to +80 degrees Celsius. It is also designed to withstand certain levels of shock and vibration, making it suitable for railway applications.
How can I ensure the relay is installed safely?
The relay should be installed by a qualified electrician, ensuring that it is finger-safe and that all connections are secure. It should be mounted in a location that respects its environmental and operational limits.
What is the insulation voltage rating for this relay?
The insulation voltage rating for this relay is 690V with a degree of pollution 3, which indicates its capability to withstand a certain level of voltage without compromising safety.
Can this relay be used at high altitudes?
Yes, this relay can be used at altitudes up to 2,000 meters above sea level without degrading its performance or safety.
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