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Siemens 6ES7521-1BH10-0AA0 SIMATIC S7-1500 Digital Input Module
The Siemens 6ES7521-1BH10-0AA0 is a SIMATIC S7-1500 DI 16×24 V DC BA digital input module with 16 digital inputs for acquiring standard 24 V DC switching signals. It is designed as a basic S7-1500 digital input solution with a typical 3.2 ms input delay and IEC 61131 Type 3 input characteristics, providing reliable monitoring of sensors, switches, push buttons, and other binary field devices. The module includes a 40-pole Push-in front connector, making it suitable for straightforward wiring in S7-1500 control cabinets.
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Categories: PLC I/O Modules
Description
The Siemens SIMATIC S7-1500 DI 16×24 V DC BA provides 16 digital inputs for processing standard 24 V DC signals from field devices. The inputs use the IEC 61131 Type 3 characteristic, with a signal “0” range of −30 to +5 V and a signal “1” range of +11 to +30 V. Each active input typically draws 2.7 mA, while the input response time is specified at approximately 3 to 4 ms for both signal transitions. The module is designed for standard digital input applications where dependable 24 V DC signal acquisition is required without advanced high-speed functions.
The module provides 16 inputs in one electrically isolated group and supports connection of 2-wire sensors, with a maximum permitted quiescent current of 1.5 mA for the sensor. It does not provide configurable input delays, counter functions, diagnostic alarms, or hardware interrupts, making it a straightforward basic digital input module for standard automation applications. Siemens specifies shielded field cables up to 1,000 m and unshielded cables up to 600 m, while the module operates from a 24 V DC supply and provides green RUN and channel-status indication together with a red ERROR LED. Its compact 25 × 147 × 129 mm housing and approximately 230 g weight make it well suited to space-conscious S7-1500 installations.
QTech Safety is a leading supplier of Siemens 6ES7521-1BH10-0AA0 SIMATIC S7-1500 Digital Input Module in Ireland, offering competitive prices and fast worldwide shipping across United Kingdom (UK), Germany, France, Italy, Spain, United States USA, Canada, Mexico, and Western Australia (Perth). Buy Siemens PLC I/O Modules from one of Ireland’s most trusted industrial safety equipment suppliers.
Features of Siemens 6ES7521-1BH10-0AA0 SIMATIC S7-1500 Digital Input Module
- SIMATIC S7-1500 DI 16×24 V DC BA digital input module.
- Provides 16 digital inputs.
- Designed for 24 V DC signals.
- Uses IEC 61131 Type 3 input characteristics.
- Provides a typical 3.2 ms input delay.
- Suitable for standard digital signal acquisition.
- Supports 2-wire sensors.
- Provides 16 inputs in one group.
- Inputs are electrically isolated from the backplane bus.
- Supports shielded cables up to 1,000 m.
- Supports unshielded cables up to 600 m.
- Provides RUN LED indication.
- Provides ERROR LED indication.
- Provides individual channel-status LEDs.
- Includes a 40-pole Push-in front connector.
- Designed for straightforward S7-1500 cabinet installation.
- Suitable for sensors and switches.
- Suitable for push-button monitoring.
- Suitable for machine-status monitoring.
- Suitable for general-purpose industrial automation.
Technical Specifications of Siemens 6ES7521-1BH10-0AA0
- Product Type: DI 16×24 V DC BA
- Product Family: SIMATIC S7-1500 digital input modules
- Article Number: 6ES7521-1BH10-0AA0
- Number of Digital Inputs: 16
- Input Type: Digital, P-reading
- Rated Input Voltage: 24 V DC
- Permissible Supply Voltage: 19.2–28.8 V DC
- Signal 0 Input Voltage: −30 to +5 V DC
- Signal 1 Input Voltage: +11 to +30 V DC
- Input Current at Signal 1: 2.7 mA typical
- Input Characteristic: IEC 61131 Type 3
- Input Delay: 3–4 ms
- Input Delay Parameterizable: No
- Counter Function: No
- MSI: Yes
- Isochronous Mode: No
- 2-Wire Sensor Support: Yes
- 2-Wire Sensor Quiescent Current: 1.5 mA max.
- Diagnostics: No
- Diagnostic Alarm: No
- Hardware Interrupt: No
- Wire-Break Detection: No
- Shielded Cable Length: 1,000 m max.
- Unshielded Cable Length: 600 m max.
- Power Consumption from Backplane Bus: 1.05 W
- Power Loss: 1.8 W typical
- Potential Separation from Backplane Bus: Yes
- Isolation Test Voltage: 707 V DC, type test
- Front Connector: 40-pole Push-in, included
- Degree of Protection: IP20
- Operating Temperature: −30°C to +60°C horizontal; −30°C to +40°C vertical
- Dimensions (W × H × D): 25 × 147 × 129 mm
- Weight: Approx. 230 g
- Certifications/Approvals: Applicable Siemens EU product declarations and certificates
Applications
The Siemens 6ES7521-1BH10-0AA0 SIMATIC S7-1500 Digital Input Module is commonly used in:
- Standard 24 V DC sensor monitoring
- Push-button and switch monitoring
- Machine-state detection
- Limit-switch applications
- Proximity-sensor monitoring
- Conveyor automation
- Control-panel installations
- General-purpose S7-1500 digital input applications
Why Choose QTech Safety?
At QTech Safety, we’re more than just a safety supplier we’re your trusted partner in workplace protection and compliance.
Here’s why companies across UK and Ireland (EU) choose us for safety products and training:
- Comprehensive Range of Safety Equipment:
From gas detection and PPE to industrial safety tools, we offer one of the widest selections of trusted brands all at competitive Irish market prices. - Test & Measurement Instruments You Can Trust:
We supply a wide range of test and measurement instruments from the most leading and trusted brands, including industrial sensors, multimeters, oscilloscopes, accelerometers, proximity sensors, and other advanced measurement tools to support accurate diagnostics, condition monitoring, calibration, and maintenance applications. - Expert Health & Safety Training:
We provide professional health and safety training programmes designed to help your workforce stay compliant and confident on the job. - Fast, Reliable Delivery Worldwide:
Whether you’re in Texas United States or Perth Western Australia, our fast delivery service ensures you get your safety equipment quickly and efficiently. - Trusted by European Businesses:
We’re proud to support industries across Europe (UK) with certified safety solutions, expert advice, and responsive customer service.
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At QTech Safety, we supply industrial sensors and instrumentation across Ireland, offering fast and reliable worldwide delivery. Through strong global logistics partnerships, we ensure efficient shipping and professional support for customers in Europe, North America, and Australia.
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