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6ES7521-1BL10-0AA0 is a digital input module from the Siemens (Siemens) SIMATIC S7-1500 series, with the model designation DI 32x24VDC BA.
Main Function and Use
This module is used in industrial automation systems to acquire digital signals from the field, such as switch statuses, button signals, or proximity switch signals, and transmit them to the Programmable Logic Controller (PLC) for processing. Its key features include:
High-density inputs: It provides 32 digital input channels, suitable for applications requiring a large number of signal acquisitions.
Signal type: The rated input voltage is 24 V DC. It is suitable for switches and 2-/3-/4-wire proximity switches.
Electrical isolation: The channels are electrically isolated in groups of 16, which improves the system's noise immunity and safety.
Ease of installation: The module width is only 25 mm, and it comes with a push-in front connector, making it easy to install and wire.
Compatibility: It is compatible with the Siemens SIMATIC S7-1500 automation system as well as the ET 200MP distributed I/O system.
Technical Specifications
The following are the main technical specifications for this module:
| Specification | Value |
|---|---|
| Product Type Designation | DI 32x24VDC BA |
| Number of Inputs | 32 |
| Rated Input Voltage | 24 V DC |
| Permitted Voltage Range | 20.4 V to 28.8 V DC |
| Input Current (signal "1") | Typ. 2.7 mA |
| Input Delay | Typ. 3.2 ms |
| Input Type | Type 3 (according to IEC 61131) |
| Channel Grouping | Electrically isolated in groups of 16 |
| Connection Method | Includes front connector Push-in terminal |
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