Siemens 3RH2911-1HA22 Component

Siemens 3RH2911-1HA22 front-mounted auxiliary contact module, 3RH2911-1HA22 technical parameters, 3RH2911-1HA22 alternative models, 3RH2911-1HA22 official order number, 3RH2911-1HA22 applicable environment, Differences between 3RH2911-1HA22 and 3RH1911-1HA22, 3RH2911-1HA22 installation method, Complete model list of Siemens 3RH2 series auxiliary contacts, 3RH2911-1HA22 screw terminal specifications, 3RH2911-1HA22 compatibility (suitable for 3RT2 contactors)

1. Brief Overview

Siemens 3RH2911-1HA22 is a front-mounted auxiliary contact module under the SIRIUS Innovation Series, belonging to the 3RH2 series. It is mainly used to expand the number of contact points in the control circuit of 3RT2 series contactors and 3RH2 series contactor relays, providing reliable signal transmission and switching functions for industrial control circuits. This component adopts a snap-on installation design, which can be quickly assembled without tools. It is equipped with 2 Normalement ouvert (NON) + 2 Normalement fermé (Caroline du Nord) contacts, using a screw terminal connection method. The rated contact current is 10A AC / 6A DC, the insulation voltage is 690V, et le niveau de protection est IP20. It is widely used in various industrial automation control scenarios and is a common auxiliary component in Siemens low-voltage control field. It is also the official alternative model for the discontinued 3RH1911-1HA22.

III. Model Meaning Interpretation

The model Siemens 3RH2911-1HA22 consists of 8 character segments. The meaning of each segment is interpreted as follows, which accurately corresponds to the core parameters of the product, facilitating quick identification of product specifications:

1. 3RH: Product series identifier, representing Siemens SIRIUS series auxiliary contacts / contactor relay products, which is the core prefix identifier of this series of components;
2. 2: Product generation identifier, indicating that this auxiliary contact belongs to the 2nd generation product, which has optimized performance and compatibility compared with the 1st generation products (such as 3RH1 series);
3. 9: Installation position identifier, le numéro “9” indicates that this auxiliary contact is front-mounted, which can be directly snapped to the front of the contactor without additional tools for fixation;
4. 11: Basic identifier of contact group number and type, indicating that the product is configured with 4 contacts (2NON + 2Caroline du Nord), which is one of the most commonly used contact combination specifications in this series;
5. 1: Terminal type identifier, le numéro “1” indicates the use of screw terminal connection method, which is firmly connected and suitable for conventional industrial wiring needs;
6. HA: Contact combination and adaptation specification identifier, “HA” indicates that the contact configuration is 2 Normalement ouvert (NON) + 2 Normalement fermé (Caroline du Nord), and it is suitable for contactors of S00 to S0 specifications;
7. 22: Version and compliance identifier, indicating that the product meets international general electrical standards (UL, ASC, CAE, Certification CE), is a standard general version, and is suitable for compliance requirements of most industrial scenarios around the world.
8. Applicable Operating Environment

This component is specially designed for industrial automation control scenarios and is suitable for a variety of complex industrial environments. The specific parameters and applicable scope are as follows, with accurate and verifiable data:

1. Temperature Environment: The operating temperature range is -25℃ ~ +60℃, and the storage temperature range is -55℃ ~ +80℃. It can adapt to high and low temperature industrial scenarios, such as control circuits in workshops in cold areas and beside high-temperature equipment;
2. Niveau de protection: Niveau de protection IP20, with touch protection function, which can effectively prevent the intrusion of solid foreign objects (diameter ≥ 12.5mm). It is suitable for non-outdoor, non-direct wet contact scenarios such as inside control cabinets and equipment control panels;
3. Voltage and Pollution Level: Insulation voltage 690V, pollution level 3, which can be adapted to medium and high voltage industrial control circuits, and can work stably in environments with slight dust and no serious corrosion, such as control cabinets in machinery manufacturing, metallurgy, electric power and other industries;
4. Environnement d'installation: Suitable for snap-on installation (no tools required), installed at the front of 3RT2 series contactors or 3RH2 series contactor relays. It requires a flat installation surface without obvious vibration, and the vibration frequency meets the conventional standards of industrial equipment (mechanical service life up to 10 millions de fois);
5. Scénarios applicables: Widely used in machinery manufacturing, metallurgy, cement, machines d'emballage, power control and other industrial fields, for signal switching and expansion in relay logic circuits, solid-state electronic devices, motor control and other scenarios. It is especially suitable for the construction of standard control cabinets in early OEM projects of S7-200CN and S7-200SMART.
6. Other Brand Comparison / Modèles alternatifs

As a standard Siemens auxiliary contact, this component can be interchanged with similar products of multiple brands, and there are clear internal alternative models of Siemens. The specific comparisons are as follows to ensure replacement compatibility:

(je) Other Brand Comparison (Direct Replacement with the Same Specifications)

1. Schneider: TeSys D series LA1-D22M7 auxiliary contact module (2NON + 2Caroline du Nord, screw terminals, front-mounted, suitable for Schneider LC1D series contactors, fully matching the specifications of 3RH2911-1HA22);
2. ABB: AX series AX22-30-10 auxiliary contact (2NON + 2Caroline du Nord, screw terminals, front-mounted, suitable for ABB A series contactors, with the same performance parameters as 3RH2911-1HA22);
3. Omron: G7L series G7L-2A-B auxiliary contact module (2NON + 2Caroline du Nord, screw terminals, snap-on installation, suitable for Omron G7L series contactors, can be directly replaced);
4. Mitsubishi: SD series SD-N22 auxiliary contact (2NON + 2Caroline du Nord, screw terminals, front-mounted, suitable for Mitsubishi SD series contactors, with good compatibility).

(II) Modèles alternatifs (Siemens Internal and Upgraded Alternatives)

1. Direct Replacement (Same Specifications): Siemens 3RH2911-1FA22, which has the same core parameters as 3RH2911-1HA22, with only a slight difference in terminal type (1FA22 is a spring terminal), which can be replaced according to wiring needs;
2. Upgraded Replacement (Performance Optimized): Siemens 3RH2911-2HA22, which is an upgraded version of 3RH2911-1HA22. It optimizes contact stability, slightly improves mechanical life and electrical life, and is suitable for more harsh control scenarios;
3. Discontinued Model Replacement: Siemens 3RH1911-1HA22 (abandonné). 3RH2911-1HA22 is its official designated subsequent replacement model. The two have the same installation size and contact specifications, and can be directly replaced without modifying the installation structure and wiring method.
4. Official Order Number

The official order number (manufacturer’s part number) of this component is 3RH2911-1HA22. This order number is a global unified standard number of Siemens, which can be directly used for ordering through official channels (Centre commercial industriel Siemens, authorized distributors) to ensure that the product is original and genuine.

Note complémentaire: Reference of auxiliary order numbers (stock numbers) from different channels: RS Components stock number 706-0923, Distrelec part number 300-57-510, Mouser part number 3RH29111HA22, all corresponding to the official order number of this component. They can be used as auxiliary query basis during purchase, but priority should be given to the official order number when ordering.

Purchase Reference: The market purchase unit price of this component is about 20 yuan (the price is for reference only, subject to the actual purchase quantity and channel). Some online channels have spot supply. It is recommended to consult customer service to confirm the spot situation and freight policy before placing an order. Freight may be incurred for a single order less than 199 yuan. Preferential treatment can be enjoyed for large-quantity purchases, and invoice service is supported by some channels.

VII. Installation and Usage Notes

To ensure standardized installation, safe use and extended service life of the component, combined with the general requirements for industrial equipment installation, the following points should be noted:

1. Préparation avant l'installation: Avant l'installation, check whether the appearance of the component is intact, without damage, deformation or missing parts. Confirm that the model and specification are consistent with the order form and actual use needs. En même temps, prepare special tools such as insulated screwdrivers to avoid damage to parts caused by non-special tools;
2. Correct Installation Operation: Strictly follow the snap-on installation requirements, smoothly snap the module to the front of the 3RT2 series contactor or 3RH2 series contactor relay to ensure firm installation without looseness. The installation surface should be flat to avoid poor contact caused by installation deviation; when wiring, wire in accordance with the terminal identification specifications, and tighten the screw terminals to prevent poor contact or heating caused by loose wiring, and avoid equipment damage caused by short circuit at the output end;
3. Safety Protection Requirements: Disconnect the relevant power supply during installation and wiring to avoid electric shock risk caused by live operation; the protection level of this component is IP20, which is only suitable for non-outdoor and non-humid scenarios such as inside control cabinets. Avoid exposure to outdoor, humid or severely corrosive environments to prevent equipment damage or safety accidents; the equipment shell should be reliably grounded to ensure leakage protection safety;
4. Use and Maintenance: Pendant l'utilisation, regularly check the contact condition of the contacts to avoid dust accumulation affecting contact performance, and regularly clean the dust on the surface and around the component; if faults such as contact adhesion and poor contact occur, stop the machine for inspection in time and replace the component if necessary; avoid the component being in an overload state for a long time, ensure that the operating parameters meet the rated standards, and extend the service life; regularly check the installation firmness to avoid module falling off or wiring loosening caused by vibration.

VIII. Complete Model List of This Series

Siemens 3RH2911 series are front-mounted auxiliary contact modules, all suitable for 3RT2 series contactors and 3RH2 series contactor relays. The core differences lie in contact combination and terminal type. The complete model list is as follows (covering common specifications, data are all from Siemens official product catalog):

1. 3RH2911-1HA02: Front-mounted auxiliary contact, 2Caroline du Nord, screw terminals, suitable for S00-S0 specifications;
2. 3RH2911-1HA11: Front-mounted auxiliary contact, 1NON+1NC, screw terminals, suitable for S00-S0 specifications;
3. 3RH2911-1HA13: Front-mounted auxiliary contact, 1NO+3NC, screw terminals, suitable for S00-S0 specifications;
4. 3RH2911-1HA20: Front-mounted auxiliary contact, 2NON, screw terminals, suitable for S00-S0 specifications;
5. 3RH2911-1HA22: Front-mounted auxiliary contact, 2NON+2NC, screw terminals, suitable for S00-S0 specifications (model introduced in this article);
6. 3RH2911-1HA31: Front-mounted auxiliary contact, 3NON+1NC, screw terminals, suitable for S00-S0 specifications;
7. 3RH2911-1FA04: Front-mounted auxiliary contact, 4Caroline du Nord, spring terminals, suitable for S00-S0 specifications;
8. 3RH2911-1FA11: Front-mounted auxiliary contact, 1NON+1NC, spring terminals, suitable for S00-S0 specifications;
9. 3RH2911-1FA20: Front-mounted auxiliary contact, 2NON, spring terminals, suitable for S00-S0 specifications;
10. 3RH2911-1FA22: Front-mounted auxiliary contact, 2NON+2NC, spring terminals, suitable for S00-S0 specifications;
11. 3RH2911-1FA40: Front-mounted auxiliary contact, 4NON, spring terminals, suitable for S00-S0 specifications;
12. 3RH2911-1AA01: Front-mounted auxiliary contact, 1Caroline du Nord, upper wiring, screw terminals, suitable for S00-S0 specifications;
13. 3RH2911-1AA10: Front-mounted auxiliary contact, 1NON, upper wiring, screw terminals, suitable for S00-S0 specifications;
14. 3RH2911-1BA01: Front-mounted auxiliary contact, 1Caroline du Nord, lower wiring, screw terminals, suitable for S00-S0 specifications;
15. 3RH2911-1BA10: Front-mounted auxiliary contact, 1NON, lower wiring, screw terminals, suitable for S00-S0 specifications;
16. 3RH2911-1LA11: Front-mounted auxiliary contact, 1NON+1NC, upper wiring, screw terminals, suitable for S00-S0 specifications;
17. 3RH2911-1LA20: Front-mounted auxiliary contact, 2NON, upper wiring, screw terminals, suitable for S00-S0 specifications;
18. 3RH2911-1MA11: Front-mounted auxiliary contact, 1NON+1NC, lower wiring, screw terminals, suitable for S00-S0 specifications;
19. 3RH2911-1MA20: Front-mounted auxiliary contact, 2NON, lower wiring, screw terminals, suitable for S00-S0 specifications;
20. 3RH2911-1DA02: Front-mounted auxiliary contact, 2Caroline du Nord, side-mounted, screw terminals, suitable for S00-S0 specifications;
21. 3RH2911-1DA11: Front-mounted auxiliary contact, 1NON+1NC, side-mounted, screw terminals, suitable for S00-S0 specifications;
22. 3RH2911-1DA20: Front-mounted auxiliary contact, 2NON, side-mounted, screw terminals, suitable for S00-S0 specifications;
23. 3RH2911-2HA22: Front-mounted auxiliary contact, 2NON+2NC, screw terminals, suitable for S00-S0 specifications (upgraded version);
24. 3RH2911-2FA22: Front-mounted auxiliary contact, 2NON+2NC, spring terminals, suitable for S00-S0 specifications (upgraded version).

Note complémentaire: All models of this series belong to the Siemens SIRIUS 3RH2 series. La durée de vie mécanique est 10 millions de fois, the electrical service life (AC-15/230V) est 200,000 fois, and the insulation voltage is 690V. The differences are only in contact combination, terminal type, méthode d'installation (front-mounted / side-mounted), and wiring method (upper / lower wiring). The corresponding model can be selected according to actual control needs.