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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RH2911-1FB11 |
| Alternative Part Number | 3RH29111FB11 |
| Manufacturer | Siemens |
| Product Brand Name | SIRIUS |
| Suitability for Use | Contactor relay and power contactor |
| Protection Class IP | IP20 on the front |
| Ambient Temperature | -25 … +60 °C during operation, -55 … +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 | One incorrect switching operation of 100 million switching operations (17 V, 1 mA) |
| Insulation Voltage | Rated value of 690 V with degree of pollution 3 |
| Impulse Voltage Resistance | Rated value of 6 kV |
| Mounting Type | Snap-on mounting |
| Dimensions | Width: 36 mm, Height: 37.5 mm, Depth: 43.7 mm |
| Electrical Connection | Screw-type terminals for auxiliary and control current circuit |
| Connectable Conductor Cross-sections | For auxiliary contacts: 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) solid and finely stranded |
| AWG Conductors | For auxiliary contacts: 2x (20 ... 16), 2x (18 ... 14) |
| Product Functions | Does not have mirror contact acc. to IEC 60947-4-1 or positively driven operation acc. to IEC 60947-5-1 |
The Siemens 3RH2911-1FB11 is a high-quality auxiliary switch block designed to enhance the functionality of contactor relays and power contactors. This component is part of the esteemed SIRIUS product line, renowned for its reliability and versatility in various industrial applications. The switch block features a front-mounted design, providing easy access and straightforward installation.
Equipped with one normally open (NO) and one normally closed (NC) contact, the 3RH2911-1FB11 offers flexibility for controlling electrical circuits. The robust construction ensures a mechanical service life of typically 10 million switching cycles, making it a durable choice for repetitive operations. With an electrical endurance of 200,000 switching cycles at AC-15 at 230 V, this auxiliary switch block is built to last even in demanding conditions.
The unit is rated for an insulation voltage of 690 V with a degree of pollution 3, and it can withstand impulse voltages up to 6 kV, ensuring it can handle surges and maintain circuit integrity. The switch block operates reliably within an ambient temperature range of -25 to +60 °C, making it suitable for a wide range of environments.
With a protection class of IP20 on the front, the 3RH2911-1FB11 is designed to prevent the ingress of solid objects, adding an extra layer of protection for the internal components. The compact dimensions, featuring a width of 36 mm, a height of 37.5 mm, and a depth of 43.7 mm, allow for efficient use of space inside control cabinets.
The screw-type terminals provide a secure and reliable electrical connection for auxiliary and control current circuits, accommodating various conductor cross-sections for flexible wiring options. This auxiliary switch block does not have mirror contact or positively driven operation according to IEC standards, which should be considered when integrating into safety-related applications.
Overall, the Siemens 3RH2911-1FB11 auxiliary switch block is a dependable and practical solution for enhancing control systems, offering consistent performance and ease of use for engineers and technicians in the UK and beyond.
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Frequently Asked Questions
What is the function of this auxiliary switch block?
The auxiliary switch block is designed to be snapped onto the front side of contactor relays and power contactors. It provides additional switching capabilities, typically for signalling and interlocking purposes, with 1 normally open (NO) and 1 normally closed (NC) contact.
Can this auxiliary switch block be used with any size of contactor?
This auxiliary switch block is suitable for use with size S00 and S0 contactor relays and power contactors, ensuring compatibility with specific models within this size range.
What is the protection class of this auxiliary switch block?
The protection class for the front side of this auxiliary switch block is IP20, indicating a basic level of protection against solid objects.
What are the ambient temperature limits for operating this auxiliary switch block?
The auxiliary switch block can operate within an ambient temperature range of -25 to +60 degrees Celsius, ensuring reliable performance within these limits.
What is the mechanical service life of this auxiliary switch block?
The mechanical service life of the auxiliary switch block is typically 10 million switching cycles, highlighting its durability and longevity.
How does the electrical endurance of this auxiliary switch block compare?
The electrical endurance of the auxiliary switch block is rated at 200,000 switching cycles at AC-15 at 230 V, which is typical for devices of this nature.
What is the insulation voltage rating for this auxiliary switch block?
The insulation voltage rating for this auxiliary switch block, with a degree of pollution 3, is 690 V.
What is the surge voltage resistance of this auxiliary switch block?
The surge voltage resistance of this auxiliary switch block is rated at 6 kV.
How is the auxiliary switch block mounted?
The auxiliary switch block is designed for snap-on mounting, allowing for easy and secure attachment to the front of compatible contactors.
What type of electrical connection does this auxiliary switch block use?
This auxiliary switch block utilises screw-type terminals for its electrical connections, providing a reliable and secure method for wiring.
