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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RH1911-2FA31 |
| Alternative Part Number | 3RH19112FA31 |
| Manufacturer | Siemens |
| Product Brand Name | SIRIUS |
| Type | Auxiliary Switch Block |
| Configuration | 3 Normally Open (NO) + 1 Normally Closed (NC) contacts |
| Connection Type | Cage Clamp Connection |
| Mounting Type | Snap-on Mounting |
| Suitable For | Contactor Relays and Contactors for Switching Motors |
| Size | S00 |
| Operating Voltage | Up to 690 V Insulation Voltage |
| Impulse Voltage Resistance | Rated at 6 kV |
| Operating Current for AC-12 | 10 A at 24 V / 230 V |
| Operating Current for AC-15 | 6 A at 24 V / 230 V, 3 A at 400 V, 1 A at 690 V |
| Operating Current for DC-12 | 10 A at 24 V / 60 V, 4 A at 110 V, 2 A at 220 V |
| Operating Current for DC-13 | 6 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V |
| Mechanical Operating Cycles | Typically 10,000,000 |
| Electrical Operating Cycles | Typically 200,000 at AC-15 / 230 V |
| Ambient Operating Temperature | -25 to +60 °C during operation |
| Storage Temperature | -55 to +80 °C |
| Protection Class | IP20 on the front |
| Width | 36.5 mm |
| Height | 37.5 mm |
| Depth | 46 mm |
| Safety Features | Mirror contact according to IEC 60947-4-1, Positively driven operation according to IEC 60947-5-1 |
| Approvals | General Product Approval, Functional Safety/Safety of Machinery, Type Examination |
The Siemens 3RH1911-2FA31 is a high-quality auxiliary switch block designed for seamless integration with contactor relays and motor switches. This component is engineered to facilitate reliable switching operations within industrial control systems. It features a configuration of 3 normally open (NO) and 1 normally closed (NC) contacts, adhering to the DIN EN50005 standard, and offers a cage clamp connection for secure and straightforward installation.
Crafted for durability and performance, the switch block operates efficiently across a wide range of ambient temperatures, from as low as -25°C to as high as +60°C, ensuring consistent functionality in diverse working environments. The unit boasts an impressive mechanical operating cycle of typically 10 million operations, and an electrical operating cycle of 200,000 at AC-15 at 230V, highlighting its robustness and longevity.
The 3RH1911-2FA31 auxiliary switch block is compact with dimensions of 36.5mm in width, 37.5mm in height, and 46mm in depth, making it a space-efficient choice for panel builders and system integrators. Its spring-loaded terminals accommodate various conductor cross-sections, ensuring compatibility with a range of wiring configurations.
With an insulation voltage rated at 690V and impulse voltage resistance of 6kV, the switch block is designed to maintain electrical integrity and safety. It also features mirror contacts to IEC 60947-4-1 and positively driven operation to IEC 60947-5-1, further enhancing its operational reliability.
The Siemens 3RH1911-2FA31 is a testament to Siemens' commitment to quality and innovation, providing a dependable solution for industrial control applications that require precise auxiliary switching.
Commonly Asked Questions
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Frequently Asked Questions
What is the function of an auxiliary switch block?
An auxiliary switch block is used to provide additional contact combinations for control and signalling functions within a control system. It is typically used in conjunction with contactor relays and power contactors for switching motors.
Can this auxiliary switch block be used in safety applications?
Yes, the 3RH1911-2FA31 auxiliary switch block is designed with features such as mirror contacts and positively driven operation, making it suitable for use in safety-related applications.
What type of connections does this auxiliary switch block support?
The auxiliary switch block supports cage clamp connections, which provide a secure and reliable connection for the auxiliary and control current circuits.
What are the environmental operating conditions for this auxiliary switch block?
The auxiliary switch block can operate within an ambient temperature range of -25°C to +60°C for operating conditions, and -55°C to +80°C for storage conditions.
How many mechanical operating cycles can this auxiliary switch block withstand?
The auxiliary switch block is designed for typically 10 million mechanical operating cycles, indicating its durability and reliability for long-term use.
What is the insulation voltage rating for this auxiliary switch block?
The insulation voltage rating for the auxiliary switch block is 690V with a degree of pollution 3, ensuring it can handle high-voltage environments safely.
What is the impulse voltage resistance of this auxiliary switch block?
The impulse voltage resistance of the auxiliary switch block is rated at 6kV, which helps to protect the circuit from voltage spikes.
What are the dimensions of this auxiliary switch block?
The dimensions of the auxiliary switch block are 36.5mm in width, 37.5mm in height, and 46mm in depth, making it compact and suitable for various installation environments.
What is the protection class of this auxiliary switch block?
The protection class for the front of the auxiliary switch block is IP20, which provides protection against solid objects larger than 12.5mm but not against liquids.
How many auxiliary contacts does this switch block have?
The auxiliary switch block has 3 normally open (NO) contacts and 1 normally closed (NC) contact, providing flexibility in control circuit design.
Part conditions explained
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