SIEMENS 3RK2400-1BT30-0AA3 Module Digital Slave Di Dq K20 A/b DI/2
( Brand: Siemens ), ( Manufacturer Part Number: 3RK2400-1BT30-0AA3 ), ( Type: As-i Compact Module K20 Digital A/b Slave, 2 Di/2 Dq ), ( Country Of Origin: Czech Republic )
Review SIEMENS As i Compact Module K20 Digital A/b Slave Di/2 Dq
The **Siemens 3RK2400-1BT30-0AA3 AS-i Module (K20 Digital A/B Slave DI/2 DQ)** is a high-performance, compact fieldbus interface designed to seamlessly integrate into Siemens AS-i (Actuator Sensor Interface) communication network, providing reliable digital signal processing for industrial automation applications. Part of the **SIMATIC ET 200SP** modular series, this module serves as a versatile **AS-i slave device**, specifically configured to handle **two digital inputs (DI)** and **two digital outputs (DO)**, all operating in the **A/B signal range**, which ensures compatibility with a wide range of standard industrial sensors and actuators. The **K20 designation** indicates its compatibility with the **AS-i 3.0 standard**, enabling high-speed, deterministic communication at up to **16.7 ms cycle times**, making it ideal for real-time control applications where precision and responsiveness are critical.
Engineered with Siemens robust engineering standards, this module features a **compact, DIN-rail-mountable design**, allowing for easy installation in control cabinets or distributed I/O systems. Its **AS-i interface** operates over a single twisted-pair cable, simplifying wiring and reducing installation complexity while maintaining high immunity to electromagnetic interference (EMI), ensuring stable performance in harsh industrial environments. The module supports **AS-i s master-slave architecture**, where the master (typically a PLC or higher-level controller) polls the slave devices, enabling efficient data exchange with minimal latency. The **two digital inputs** are configured for **A/B signal levels**, accommodating a broad range of sensors, including dry contacts, PNP/NPN sensors, or other compatible devices, while the **two digital outputs** provide **A/B sink/source outputs**, allowing for direct control of relays, solenoids, or other actuators with minimal additional hardware.
One of the standout features of this module is its **plug-and-play compatibility** with Siemens **TIA Portal**, where it can be easily configured, parameterized, and integrated into automation projects using the **SIMATIC STEP 7** or **SIMATIC WinCC** software environments. The module s **diagnostic capabilities** include built-in status monitoring, fault detection, and error reporting, which can be accessed via the AS-i bus or through the PLC s diagnostic tools, enhancing maintainability and reducing downtime. Additionally, its **wide operating temperature range** (typically **-25 C to 60 C**) ensures reliable operation in diverse industrial settings, from cleanroom environments to dusty or humid manufacturing floors.
For applications requiring **expanded functionality**, the **3RK2400 series** modules are designed to work in conjunction with other AS-i devices, such as analog modules, counter modules, or additional digital I/O extensions, creating a scalable and flexible I/O architecture. The module s **AS-i 3.0 compliance** also supports advanced features like **cyclic and acyclic data transfer**, **event-based communication**, and **priority handling**, making it suitable for applications where real-time responsiveness is essential, such as in packaging machines, conveyor systems, or process automation. Whether used in standalone configurations or as part of a larger distributed I/O network, the **Siemens 3RK2400-1BT30-0AA3 AS-i Module** delivers a reliable, efficient, and future-proof solution for digital signal acquisition and control in industrial automation.
### **Pros and Cons of buying a Siemens 3RK2400-1BT30-0AA3 AS-i Module (K20 Digital A/B Slave DI/2 DQ)**
#### **Pros:**1. **Compatibility with Siemens AS-i Networks** This module is designed specifically for Siemens AS-i (Actuator-Sensor-Interface) communication, ensuring seamless integration with existing Siemens PLCs and automation systems.
2. **Digital Input Functionality** It provides two digital inputs (A/B), allowing for reliable detection of binary signals (e.g., limit switches, push buttons, or sensors) in industrial applications.
3. **Digital Output (DQ)** The module includes a digital output that can control actuators, relays, or other binary devices, expanding automation capabilities.
4. **Compact and Modular Design** As part of the Siemens K20 series, it fits into standard rack-mounted systems, saving space in control panels.
5. **Reliable Performance** Siemens modules are known for durability and low failure rates, making them suitable for harsh industrial environments.
6. **Easy Integration with TIA Portal** Works seamlessly with Siemens engineering software, simplifying programming and diagnostics.
7. **AS-i Communication Efficiency** AS-i networks are cost-effective for small-scale automation, reducing wiring complexity compared to traditional 4-20mA or Profibus systems.
8. **Support for Mixed Input/Output Applications** Can be used alongside other AS-i devices (e.g., analog modules, sensors) in a single network.
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#### **Cons:**1. **Limited to AS-i Protocol** If your system requires other communication protocols (e.g., Profibus, Ethernet/IP, or Modbus), this module will not be compatible without additional gateways.
2. **No Analog Inputs/Outputs** Since it is a digital-only module, it cannot handle analog signals (e.g., temperature, pressure, or speed sensors).
3. **Dependence on Siemens Ecosystem** If you are not already using Siemens PLCs or AS-i infrastructure, integrating this module may require additional investment in compatible hardware.
4. **Potential Obsolescence Risk** Older Siemens modules (like this one) may eventually be discontinued, though Siemens generally supports them for many years.
5. **Limited Scalability** For large-scale systems, AS-i may not be as scalable as Ethernet-based protocols, which offer higher data rates and more complex networking options.
6. **Requires AS-i Master Device** A compatible AS-i master (e.g., Siemens S7-1200/1500) is necessary to operate this module, adding to system complexity if not already present.
7. **Physical Wiring Constraints** AS-i uses a two-wire bus system, which may not be ideal for long-distance or high-speed applications compared to shielded Ethernet cables.
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### **Conclusion:**The **Siemens 3RK2400-1BT30-0AA3 AS-i module** is a practical choice for applications requiring **simple digital I/O within an AS-i network**, particularly in Siemens-based automation systems. It excels in **cost efficiency, ease of integration, and reliability** for small to medium-sized control tasks where binary signals are sufficient.
However, if your project requires **analog signals, high-speed communication, or non-Siemens protocols**, this module may not be the best fit. Additionally, if you are expanding beyond AS-i in the future, investing in a more versatile protocol (e.g., Ethernet/IP or Profibus) might be preferable for long-term flexibility.
### **Recommendation:** - **Buy if:**- You are already using Siemens PLCs and AS-i infrastructure.
- Your application only requires **two digital inputs and one digital output**.
- You need a **low-cost, simple, and reliable** solution for basic automation tasks.
- **Avoid if:**- You need **analog inputs/outputs** or advanced communication protocols.
- Your system is not Siemens-based, and compatibility with other brands is a priority.
- You anticipate **future scalability** beyond AS-i networks.
For most **Siemens-centric industrial applications with digital-only requirements**, this module is a solid, cost-effective choice. However, always verify compatibility with your existing system before purchasing.
Details:
Shipping Services. This item has NOT been tested but includes a 30-day warranty. Siemens 3RK2400-1BT30-0AA3 AS-i Compact Module K20 Digital A/B slave, 2 DI/2 DQ. 9-21F5-66439-RJ-GX.
part #: 3rk24001bt300aa3 prices
- $62.99-$161.20
specifications sensoindustria:
- brand: Siemens
- mpn: 3rk2400-1bt30-0aa3
- type: As-i Compact Module K20 Digital A/b Slave, 2 Di/2 Dq
- country of origin: Czech Republic
offer sensoindustria:
- options: Ship-to-home
- sold: 0
- quantity: 7
- best offers: True
- started: February 4, 2026
- availability: In Stock
seller sensoindustria:
- # reviews: 25990
- rating: 100.0%
- city: Baroda, Michigan
general sensoindustria:
- condition: Used
- PLCs HMIs > PLC Peripheral Modules > PLC Input Output Modules
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- cost: $0.00
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- transit: 2-6 Days
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- carrier: USPS, UPS
returns sensoindustria:
- method: Money back
- time: 30 Days
- policy: Returns Accepted
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