Product Overview
Technical Summary
| Product type | SIMATIC S7-300 SM 321 digital input module |
|---|---|
| Digital inputs | 32 |
| Input voltage | 120 V AC; 47 … 63 Hz |
| Signal "0" | 0 to 20V |
| Signal "1" | 74 to 132V |
| Backplane bus input current, max. | 16 mA at 5 V DC |
| Front connector | 40-pin |
| Lifecycle | Product cancellation |
Key Features
32 digital inputs with input characteristic curve in accordance with IEC 61131, type 2.
Rated input voltage: 120 V; frequency: 47 … 63 Hz.
Signal "0": 0 to 20V; signal "1": 74 to 132V.
The digital inputs are isolated from the backplane bus by an Optocoupler; isolation tested with 2 500 V DC.
Required front connector: 40-pin.
Frequently Asked Questions
What is the exact product identity?
The exact line item is Siemens 6ES7321-1EL00-0AA0, a SIMATIC S7-300 SM 321 digital input module.
What input signals does this module support?
It has 32 AC digital inputs with a rated input voltage of 120 V at 47 … 63 Hz. Signal "0" is 0 to 20V and signal "1" is 74 to 132V.
What front connector is required?
A 40-pin front connector is required.
What configuration details should be included in a quotation request?
Include the requested quantity, destination, schedule context, and whether additional BOM lines should be quoted.
