Product Overview
Technical Summary
| Product type | SIMATIC S7-300 digital input SM 321 |
|---|---|
| Digital inputs | 16 isolated DI |
| Input voltage | DC, rated value 24 V |
| Load voltage L+ | Rated value 24 V; permissible range 20.4 V to 28.8 V |
| Input type | Sourcing input |
| Front connector | 20-pin |
| Input current | 7 mA typical for signal "1" |
| Lifecycle | Product cancellation |
Key Features
The module has 16 isolated digital inputs with an IEC 61131 type 1 input characteristic curve.
Input voltage is DC, with a rated value of 24 V. The signal "0" range is -5 to +30V, and the signal "1" range is -13 to -30V.
Load voltage L+ has a rated value of 24 V, with a permissible range from 20.4 V to 28.8 V.
Connection requires a 20-pin front connector.
Maximum digital input count is 16 for horizontal installation up to 40 °C and up to 60 °C, and for vertical installation up to 40 °C.
Product lifecycle: Product cancellation. The item is identified as a spare part.
Frequently Asked Questions
What exact configuration does Siemens 6ES7321-1BH50-0AA0 have?
It is a SIMATIC S7-300 SM 321 digital input module with isolated 16 DI, 24 V DC, sourcing input, and 1x 20-pole connection.
What supply and input voltage values apply to this module?
The load voltage L+ is rated at 24 V with a permissible range from 20.4 V to 28.8 V. Input voltage is DC with a rated value of 24 V.
Which front connector is required?
A 20-pin front connector is required.
What should I provide for a quotation request?
Provide the requested quantity, destination, schedule context, and any additional BOM lines for the project quotation.
