6ES5521-8MA21| SIEMENS Communications Module

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The info

Technical information for SIEMENS 6ES5 521-8MA21

1. Input Type: The 6ES5 521-8MA21 module is specifically a digital input module, meaning it interfaces with digital signals typically from sensors or switches.

2. Input Channels: This module has a total of 16 digital input channels.

3. Input Voltage: The module operates with a voltage range suitable for typical industrial applications, often 24V DC.

4. Compatibility: It is compatible with Siemens SIMATIC S5 series PLCs, which were widely used in industrial automation applications before being succeeded by the S7 series.

5. Communication: The module communicates with the PLC via the backplane bus of the S5 system, which means it integrates directly into the PLC rack system.

6. Module Addressing: Each module in the S5 system has a specific address that is configured in the PLC programming software (STEP 5), allowing the PLC to identify and communicate with the module.

7. Status Indication: Typically, these modules have LED indicators for each input channel to indicate the status (on/off) of each digital input signal.

8. Dimensions and Mounting: The physical dimensions and mounting details would typically be specified in the module's datasheet, including information on how it fits into the PLC rack system.

9. Environmental Specifications: Details on operating temperature ranges, humidity, and other environmental specifications are also usually provided in the datasheet to ensure reliable operation in industrial environments.

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