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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RH1911-2FA20 |
| Alternative Part Number | 3RH19112FA20 |
| Manufacturer | Siemens |
| Product Type | Auxiliary Switch Block |
| Suitable Applications | Contactor relays and power contactors for switching motors |
| Size | S00 |
| Connection Type | Cage clamp connection |
| Number of NO Contacts | 2 instantaneous switching |
| Number of NC Contacts | 0 instantaneous switching |
| Operating Current for Auxiliary Contacts at AC-12 | 10 A at 24 V and 230 V, maximum 10 A |
| Operating Current for Auxiliary Contacts at AC-15 | 6 A at 24 V and 230 V, 3 A at 400 V, 1 A at 690 V |
| Operating Current for Auxiliary Contacts at DC-13 | 6 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V |
| Insulation Voltage | Rated at 690 V with degree of pollution 3 |
| Impulse Voltage Resistance | Rated at 6 kV |
| Ambient Operating Temperature Range | -25 to +60 °C during operation, -55 to +80 °C during storage |
| Mechanical Operating Cycles | Typically 10,000,000 |
| Electrical Operating Cycles | Typically 200,000 at AC-15, at 230 V |
| Contact Reliability | 1 faulty switching per 100 million operations at 17 V, 5 mA |
| Protection Class | IP20 on the front |
| Mounting Type | Snap-on mounting |
| Dimensions (W x H x D) | 36.5 mm x 37.5 mm x 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, Declaration of Conformity |
The Siemens 3RH1911-2FA20 is a high-quality auxiliary switch block designed for seamless integration with contactor relays and motor switches. This component is part of the SIRIUS product family, renowned for its reliability and performance in industrial control applications. With a protection class of IP20, it is suitable for use in a variety of operating environments.
This auxiliary switch block features two normally open (NO) contacts, providing a dependable solution for expanding control circuits. It is engineered to operate within a wide ambient temperature range, from -25°C to +60°C during operation, ensuring consistent performance even in demanding conditions.
The 3RH1911-2FA20 boasts an impressive mechanical operating life of typically 10 million cycles and an electrical operating life of 200,000 cycles at AC-15 at 230V, highlighting its durability and longevity. The contact reliability is exceptional, with a very low chance of incorrect switching operations, ensuring accurate and reliable circuit control.
Installation is made easy with its snap-on mounting design, and the spring-loaded terminals allow for quick and secure electrical connections. The switch block's dimensions are compact, with a width of 36.5mm, height of 37.5mm, and depth of 46mm, making it suitable for space-constrained applications.
The 3RH1911-2FA20 is designed with safety in mind, featuring mirror contacts according to IEC 60947-4-1 and positively driven operation according to IEC 60947-5-1 when used with 3RT1 and 3RH1 respectively.
This auxiliary switch block is a preferred choice for professionals seeking a robust and reliable component for their industrial control systems. Its technical specifications and build quality make it a valuable addition to any setup requiring precise control and long-term dependability.
Commonly Asked Questions
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Frequently Asked Questions
What is the purpose of an auxiliary switch block?
An auxiliary switch block is used to provide additional switching functions in electrical circuits. It can be used for signalling, interlocking, and control tasks within a contactor relay or power contactor setup.
Can the auxiliary switch block be mounted easily?
Yes, the auxiliary switch block is designed for snap-on mounting, which allows for quick and easy installation onto compatible devices.
What type of connections does this auxiliary switch block support?
This auxiliary switch block supports spring-loaded terminals, which are designed for secure and maintenance-free connections.
What is the rated insulation voltage for this auxiliary switch block?
The rated insulation voltage for the 3RH1911-2FA20 auxiliary switch block is 690 volts, with a degree of pollution 3.
What are the operating current specifications for this auxiliary switch block?
The operating current for the auxiliary contacts at AC-12 is 10 amps at both 24 volts and 230 volts, with a maximum of 10 amps.
What is the ambient temperature range for operating this auxiliary switch block?
The ambient temperature range for operating the auxiliary switch block is between -25 degrees Celsius and +60 degrees Celsius.
How many mechanical operating cycles can this auxiliary switch block withstand?
The auxiliary switch block is designed to withstand typically 10 million mechanical operating cycles.
Does this auxiliary switch block have a mirror contact function?
Yes, the auxiliary switch block has a mirror contact function in accordance with IEC 60947-4-1 when used with 3RT1 contactors.
What is the impulse voltage resistance of this auxiliary switch block?
The impulse voltage resistance of the auxiliary switch block is rated at 6 kilovolts.
Is the auxiliary switch block equipped with positively driven operation?
Yes, the auxiliary switch block features positively driven operation in accordance with IEC 60947-5-1 when used with 3RH1 contactor relays.
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