The Siemens 6ES7321-1BH02-0AA0 module is a digital input module belonging to the SIMATIC S7-300 series. It is mainly used to receive external digital signals (such as switching quantity, sensor signals), and convert these signals into digital signals that can be recognized by the PLC, so that the PLC can make logical judgment and control. The module has photoelectric isolation function, which can effectively suppress external interference and improve the reliability of the system.

Product parameters and specifications:

Model: 6ES7321-1BH02-0AA0
Type: S7-300 Digital input module
Number of channels: 16

Input signal type: 24V DC
Input mode: level input
Isolation mode: photoelectric isolation
Connector: 1 20-pin connector
Mounting method: DIN rail
Protection level: IP20
Operating temperature: 0°C to 55°C
Main functions:
Digital signal acquisition: Receive external digital signals.
Signal isolation: Through photoelectric isolation, effectively inhibit external interference.
Data transmission: The digital signal is transmitted to the PLC.