Technical Summary
| Product function | digital input SM 321 |
|---|---|
| Product lifecycle | Product cancellation |
| Number of digital inputs | 16 |
| Input voltage | DC |
| Input voltage, rated value | 24 V |
| Load voltage L+, rated value | 24 V |
| Load voltage L+, permissible range, lower limit | 20.4 V |
| Load voltage L+, permissible range, upper limit | 28.8 V |
| Input current for signal "1", typ. | 7 mA |
| Power loss, typ. | 3.5 W |
| Connection method | required front connector 20-pin |
| Isolation tested with | 500 V DC |
Applications
Used for connecting 24 V DC input signals to the module's 16 digital inputs.
Used as a digital input expansion module within a SIMATIC S7-300 system.
Key Features
SM 321 digital input module for the SIMATIC S7-300 family.
Provides 16 DI with channel isolation between the digital inputs and the backplane bus.
Uses 24 V DC input voltage with sourcing input configuration.
Requires a 20-pin front connector.
Lifecycle status supplied for spare-part verification.
Frequently Asked Questions
What is Siemens 6ES7321-1BH50-0AA0?
It is a SIMATIC S7-300 digital input SM 321, spare part, with isolated 16 DI, 24 V DC, sourcing input, and 1x 20-pole connection.
How many digital inputs does 6ES7321-1BH50-0AA0 have?
It has 16 digital inputs.
What input voltage does 6ES7321-1BH50-0AA0 use?
The input voltage is DC with a rated value of 24 V. The permissible range for Load voltage L+ is 20.4 V to 28.8 V.
What connector is required for 6ES7321-1BH50-0AA0?
A required front connector with 20-pin connection is specified.
What is the lifecycle status of 6ES7321-1BH50-0AA0?
Product lifecycle: Product cancellation.
