Product information
Overview
Key Features
- 16 isolated digital inputs: The SM 321 module has 16 digital inputs with an input characteristic curve in accordance with IEC 61131, type 1.
- 24 V DC input: Input voltage is DC with a rated value of 24 V; signal "0" is -30 to +5 V and signal "1" is 13 to 30V.
- Fast input response: Input delay is 0.05 ms; standard input transitions have a minimum of 25 μs and maximum of 75 μs.
- Front connection: The module requires a 20-pin front connector and has a green digital-input status indicator.
- Backplane isolation: The digital inputs have potential separation from the backplane bus by an optocoupler; isolation is tested with 500 V DC.
- Product lifecycle: The product lifecycle is Product cancellation.
Technical Summary
| Product type | SIMATIC S7-300 SM 321 isolated digital input module |
|---|---|
| Digital inputs | 16 |
| Input voltage | DC, rated value 24 V |
| Signal input ranges | "0": -30 to +5 V; "1": 13 to 30V |
| Input delay | 0.05 ms |
| Front connector | 20-pin |
| Backplane isolation | Yes; Optocoupler |
| Input current for signal "1" | 7 mA, typ. |
| Mounting capacity | Horizontal installation: 16 up to 40 °C and 16 up to 60 °C; vertical installation: 16 up to 40 °C |
| Product lifecycle | Product cancellation |
Frequently Asked Questions
What is the exact product type of Siemens 6ES7321-1BH10-0AA0?
It is a SIMATIC S7-300 SM 321 isolated digital input module with 16 digital inputs.
What supply and input voltage values does this module have?
The input voltage is DC with a rated value of 24 V. The load voltage L+ has a rated value of 24 V and a permissible range of 20.4 V to 28.8 V.
Which front connector is required?
The required front connector is 20-pin.
Does the module provide diagnostics or alarms?
No. Alarms, the diagnostics function, diagnostic alarms, and hardware interrupts are not available.
What information should I provide for a quotation request?
Provide the required quantity, destination, and any project-list context for this exact model.
