Key Features
- 16 isolated digital inputs: Provides 16 DI for signal acquisition.
- 120/230 V AC input voltage: Supports AC input voltage with rated value 230 V; 120/230 V AC (47 … 63 Hz).
- 20-pin front connector: Requires a 20-pin front connector.
- Channel isolation to backplane bus: Digital inputs are isolated from the backplane bus by optocoupler.
- Input status indication: Status indicator digital input (green): Yes.
- 4 000 V DC isolation test: Isolation tested with 4 000 V DC.
Applications
- AC digital signal acquisition: For reading 120/230 V AC digital input signals.
- 2-wire sensor connection: For connecting 2-wire sensors to the digital input channels.
Technical Summary
| Product function | SIMATIC S7-300, digital input SM 321 |
|---|---|
| Number of digital inputs | 16 |
| Input voltage | 230 V; 120/230 V AC (47 … 63 Hz) |
| Type of input voltage | AC |
| Input voltage for signal "0" | 0 to 40V |
| Input voltage for signal "1" | 79 to 264V |
| Input current for signal "1", typ. | 6.5 mA; (120 V, 60 Hz), 16 mA (230 V, 50 Hz) |
| Power loss, typ. | 4.9 W |
| Isolation tested with | 4 000 V DC |
| Required front connector | 20-pin |
Frequently Asked Questions
What is Siemens 6ES7321-1FH00-0AA0?
It is a SIMATIC S7-300 digital input SM 321 module with 16 isolated DI for 120/230 V AC.
How many digital inputs does 6ES7321-1FH00-0AA0 provide?
It provides 16 digital inputs.
What input voltage does the 6ES7321-1FH00-0AA0 support?
The input voltage is AC, with rated value 230 V; 120/230 V AC (47 … 63 Hz).
What front connector is required for 6ES7321-1FH00-0AA0?
A 20-pin front connector is required.
