The Siemens 6ES7321-1BH02-0AA0 is a SIMATIC S7-300 series digital input module (SM 321) designed to interface external digital signals with a Siemens PLC.In industrial
automation, this module is used to bring real-world discrete signals (like sensor outputs or switch closures) into the PLC’s
control logic for monitoring or process control.
Frequently Asked Questions About 6ES7321-1BH02-0AA0
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1. What does this module do? It reads digital ON/OFF signals (24 V DC) from external devices like sensors and switches and passes them into the PLC’s logic as binary inputs. 2. How many inputs does the module have? It has 16 digital input channels. 3. What voltage signals can it accept? Designed for 24 V DC industrial signals, with an acceptable operating range from about 20.4 V to 28.8 V DC. |
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