Product Overview
Technical Summary
| Product designation | SIMATIC S7-300, digital input SM 321 |
|---|---|
| Digital inputs | 16 |
| Rated input voltage | 24 V DC |
| Signal 0 input voltage | -30 to +5 V |
| Signal 1 input voltage | 13 to 30 V |
| Connection | 1x 20-pole; required front connector: 20-pin |
| Hardware interrupt | Yes; Parameterizable |
| Diagnostics | Yes; Parameterizable |
| Isochronous mode | Yes |
| Product lifecycle | Product cancellation |
Key Features
- Product designation: SIMATIC S7-300, digital input SM 321; product lifecycle: Product cancellation.
- Digital inputs: 16 digital inputs; input characteristic curve in accordance with IEC 61131, type 2.
- Input voltage: Rated input voltage: 24 V DC; signal 0: -30 to +5 V; signal 1: 13 to 30 V.
- Interfaces and connection: 1x 20-pole connection; required front connector: 20-pin.
- Interrupts and diagnostics: Parameterizable hardware interrupt, diagnostic alarm, and diagnostics function; wire-break detection to I< 1 mA.
- Installation and dimensions: 40 mm width, 125 mm height, and 120 mm depth; 200 g approximate weight.
Applications
- Isochronous operation: The module supports isochronous mode.
- Input diagnostics: The module provides parameterizable diagnostics and diagnostic alarms, including wire-break detection.
- Hardware interrupt handling: The module supports parameterizable hardware interrupts.
Frequently Asked Questions
What does 6ES7321-7BH01-0AB0 identify?
It identifies a SIMATIC S7-300 digital input SM 321 module with 16 isolated digital inputs, 24 V DC input voltage, hardware interrupt, diagnostics, and isochronous mode.
Which specifications distinguish this exact module variant?
Key distinguishing specifications are 16 digital inputs, 24 V DC rated input voltage, a 1x 20-pole connection, parameterizable input delay of 0.1 / 0.5 / 3 / 15 / 20 ms, and parameterizable diagnostics.
What connection details should be checked before quotation?
Check the complete order number, the 1x 20-pole connection, and the required 20-pin front connector.
What information is needed for a quotation?
Provide the complete order number, required quantity, and destination.
