Siemens S7-300 DIGITAL INPUT SM 321 16DI 6ES7321-1BH02-0AA0

Description

Siemens S7-300 DIGITAL INPUT SM 321 The Siemens SIMATIC S7-300 SM 321 (6ES7321-1BH02-0AA0) is a classic 16-channel digital input card as a staple in industrial automation. The S7-300 series is transitioning into its legacy phase, this specific card remains a critical spare part for thousands of active systems worldwide. Details of Siemens S7-300 6ES7-321-1BH02-0AA0 Parameter Specification Number of Inputs 16 Digital Inputs Input Voltage 24 V DC (Permissible range: 20.4 V to 28.8 V) Signal Thresholds “1” (High): 13 V to 30 V “0” (Low): -30 V to +5 V Input Current Typ. 7 mA at “1” signal Input Delay 1.2 ms to 4.8 ms Electrical Isolation Optocoupler Front Connector Type 20-pin