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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RH2911-1AA10 |
| Alternative Part Number | 3RH29111AA10 |
| Manufacturer | Siemens |
| Product Type | Auxiliary switch |
| Suitable Applications | Contactor relay and power contactor |
| Protection Class IP | IP20 |
| Ambient Temperature Range | -25 ... +60 °C during operation, -55 ... +80 °C during storage |
| Mechanical Service Life | Typically 10,000,000 switching cycles |
| Electrical Endurance | Typically 200,000 switching cycles at AC-15 at 230 V |
| Contact Reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Insulation Voltage | Rated value of 690 V with degree of pollution 3 |
| Surge Voltage Resistance | Rated value of 6 kV |
| Auxiliary Circuit | 1 Normally Open (NO) contact |
| Connection Type | Screw terminal 73 / 74 |
| Product Brand Name | SIRIUS |
The Siemens 3RH2911-1AA10 is a high-quality auxiliary switch block designed to enhance the functionality of contactor relays and motor controllers. This component is part of the esteemed SIRIUS product line, known for its reliability and versatility in various industrial applications. With a front-mounted design, it features a single normally open (NO) contact, providing a straightforward solution for users needing to expand their control systems.
Crafted to withstand a wide range of operating conditions, the 3RH2911-1AA10 operates effectively within an ambient temperature range of -25 to +60 degrees Celsius, ensuring performance stability even in demanding environments. Its mechanical service life is impressive, with up to 10 million switching cycles, and it boasts an electrical endurance of 200,000 cycles at AC-15 at 230V, highlighting its durability and long-term reliability.
The auxiliary switch block is rated for an insulation voltage of 690V with a pollution degree of 3 and has a surge voltage resistance of 6kV, providing robust protection against voltage spikes. Its screw terminal connections make installation and maintenance straightforward, accommodating various conductor cross-sections for flexible integration into existing setups.
With an IP20 protection class rating on the front, the 3RH2911-1AA10 ensures that its internal components are safeguarded against solid objects, enhancing its longevity. Its compact dimensions allow for efficient use of space within control cabinets, making it an ideal choice for systems where space is at a premium.
The Siemens 3RH2911-1AA10 auxiliary switch block is a testament to Siemens' commitment to quality, offering a dependable solution for expanding control systems in industrial applications. Its robust design and technical specifications make it a valuable addition to any setup requiring precise and reliable auxiliary switching capabilities.
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Frequently Asked Questions
What is the function of this auxiliary switch?
The auxiliary switch is designed to be used with contactor relays and power contactors, providing an additional switching function that can be used for various control and signalling purposes in electrical circuits.
Can this auxiliary switch be mounted directly onto a contactor?
Yes, it is designed to be snapped onto the front of a contactor, allowing for easy and secure mounting.
What is the protection class of this auxiliary switch?
This auxiliary switch has a protection class of IP20, indicating that it is protected against solid objects larger than 12.5mm but not against water.
What are the ambient temperature limits for operating this auxiliary switch?
The auxiliary switch can operate within an ambient temperature range of -25 to +60 degrees Celsius, and can be stored in temperatures ranging from -55 to +80 degrees Celsius.
What is the mechanical service life of this auxiliary switch?
The mechanical service life of the auxiliary switch is typically around 10 million switching cycles, indicating its durability and longevity.
What is the electrical endurance of this auxiliary switch?
The electrical endurance of the auxiliary switch is typically 200,000 switching cycles at AC-15 at 230 V, which shows its reliability over time under specified conditions.
What is the insulation voltage rating for this auxiliary switch?
The insulation voltage rating for this auxiliary switch is 690 V with a degree of pollution 3, ensuring it can safely isolate the control circuit from higher voltages.
What is the surge voltage resistance of this auxiliary switch?
The surge voltage resistance of this auxiliary switch is rated at 6 kV, which helps protect the circuit against transient voltage spikes.
How many normally closed (NC) contacts does this auxiliary switch have?
This auxiliary switch does not have any normally closed (NC) contacts; it has one normally open (NO) contact.
What is the contact reliability of this auxiliary switch?
The contact reliability of this auxiliary switch is such that there is only one faulty switching operation per 100 million switching operations at 17 V, 1 mA, which is a very high level of reliability.
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