Siemens 6ES7 321-1BL00-0AA0 Simatic S7-300 Digital Input Module 32-Pt

The Siemens 6ES7 321‑1BL00‑0AA0 is a high‑density digital input module from the SIMATIC S7‑300 series, designed to reliably acquire 24 VDC field signals through electrically isolated inputs, making it suitable for compact and robust industrial automation and machine control systems. Manufacturer: Siemens Product Line: SIMATIC S7‑300 Module Designation: SM 321 Catalog Number: 6ES7 321‑1BL00‑0AA0 Module Type: Digital Input Module Input Type: Digital, DC Number of Inputs: 32 Input Voltage Rating: 24 VDC Input Voltage Range: 20.4 to 28.8 VDC Input Configuration: Electrically isolated Number of Input Groups: 4 groups of 8 inputs Isolation: Input groups isolated from backplane logic Input Current per Channel: Approx. 6 mA at 24 VDC Input Delay: Typical 3 ms (hardware filtered) Connection Type: 1 × 40‑pole front connector Front Connector Type: 40‑pin terminal block Bus Connection: S7‑300 backplane bus Supply Voltage: Provided via S7‑300 backplane Current Consumption: Typical approx. 80 mA from backplane Status Indicators: LED indicator per input channel Mounting Type: DIN rail mounting (S7‑300 rack system) Housing Material: Industrial thermoplastic Module Color: SIMATIC S7 dark gray Operating Temperature: 0 to 60 °C (32 to 140 °F) Storage Temperature: –40 to 70 °C (–40 to 158 °F) Relative Humidity: Up to 95% non‑condensing Ingress Protection: IP20 Certifications: CE marked, UL Listed, CSA Certified Typical Applications: Sensors, switches, pushbuttons, proximity devices Product Status: Discontinued / legacy S7‑300 module Country of Manufacture: Germany Please review pictures carefully and let us know if you have any questions!