Siemens 6ES7321-1CH00-0AA0 Logic Controller Module

Product manual:

Main technical specifications:
Number of input channels: 32 digital inputs
Input voltage: 24V DC
Input current: 4.5 mA (per channel)
Input delay: configurable from 0.2 to 12.8 ms
Isolation voltage: 500 V (between channel and backplane bus)
Functional features:
High density design: A single module supports 32 inputs, suitable for applications that require a large number of input points.
LED indicator lights: Each input channel is equipped with LED indicator lights that display signal status in real-time.
Diagnostic function: capable of diagnosing faults such as input short circuits and open circuits, ensuring system reliability.
Modular architecture: suitable for compact S7-300 PLC racks, easy to expand and maintain.
Application scenarios:
Suitable for large-scale signal acquisition in manufacturing, process automation, and building management.
Commonly used for signal input of sensors, buttons, and switches to meet complex logic control requirements.

Product details picture:

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