Product Description
Product Overview
| Parameter | Details |
|---|---|
| Part Number | 6ES7321-7BH00-0AB0 |
| Product Name | SIMATIC S7-300 Digital Input Module SM 321 |
| Application | Digital signal acquisition for industrial automation and process control systems, suitable for monitoring switches, sensors, and binary signals with interrupt capability |
| Compatibility | SIMATIC S7-300 series PLC; integrates with S7-300 CPUs, ET 200M distributed I/O, and backplane-powered setups |
| Function | Provides 16 optically isolated digital inputs with process interrupt and diagnostics for reliable status monitoring and fast response |
Functional Specifications
| Parameter | Details |
|---|---|
| Number of Inputs | 16 (optically isolated) |
| Input Type | Digital inputs, 24 V DC, sink/source (IEC Type 1) |
| Supply Voltage | Rated value (DC): 24 V; Range: 20.4 V to 28.8 V |
| Input Current | Typical: 7 mA; Maximum: 15 mA |
| Input Delay | 3 ms (fixed for interrupt) |
| Process Interrupt | Yes, with 16 interrupt inputs |
| Cable Length | Maximum: 1000 m screened/unshielded cable |
| Operating Temperature | 0°C to 60°C (horizontal/vertical mounting); -20°C to +60°C derating |
| Storage Temperature | -40°C to +70°C |
| Dimensions | Width: 40 mm; Height: 125 mm; Depth: 120 mm |
| Weight | Approximately 0.22 kg |
| Protection Rating | IP20 |
| Certifications | CE mark; CSA approval; UL approval; cULus |
| Standards Compliance | IEC 61131-2; EN 61000-6-4 (EMC emissions); EN 61000-6-2 (EMC immunity) |
Ordering Information
| Parameter | Details |
|---|---|
| Part Number Configuration | 6ES7321-7BH00-0AB0 (SM 321, 16 DI, 24 V DC, process interrupt, diagnostics) |
| Available Options | Variants for different input counts (e.g., 6ES7321-1BH02-0AA0 for 16 DI without interrupt) or high-speed inputs |
| Customization | Extended temperature range or specific certifications available upon request |