Catalog > Electro-Mechanical Components > Industrial Automation SIMATIC S7-300 Digital Input SM 321 SIMATIC S7-300 Digital Input SM 321 Digital Input SM 321 6ES7321-1BP00-0AA0 SIMATIC S7-300 Digital Input SM 321, Isolated In Groups Of 16, 64 DI, 24 V DC, 3 ms 19,133.76 ZAR inc for 1 Each 1 in Stock Add Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Specifications Product Type: Digital Input Module Module Designation: SM 321 Number of Digital Inputs: 64 Rated Input Voltage: 24 V DC Input Type: Sinking / sourcing Input Isolation: Galvanically isolated in 4 groups of 16 channels Input Delay: 3 ms nominal; 1.2–4.8 ms specified range Typical Input Current: 4.2 mA per input at signal 1 Signal 0 Voltage: -30 to +5 V DC Signal 1 Voltage: 13 to 30 V DC Backplane Bus Supply: 5 V DC Maximum Backplane Current: 100 mA Typical Power Loss: 7 W Maximum Cable Length: 1,000 m shielded; 600 m unshielded Dimensions (W × H × D): 40 × 125 × 112 mm Approximate Weight: 230 g Mounting System: SIMATIC S7-300 rack Compatible Front Connector: 6ES7392 series (required separately) Application: Industrial automation, PLC-based control systems and digital signal acquisition. Downloads Datasheet PDF File 238.73 KB