Key Features
- SIMATIC S7-300 digital input module: Digital input SM 321 for the SIMATIC S7-300 system.
- 16 DI with isolated inputs: Provides 16 digital inputs with potential separation between the channels and backplane bus by optocoupler.
- 48-125 V DC input range: Input voltage rated value is 48 V; 48 V DC to 125 V DC.
- 20-pin front connector: Requires a 20-pin front connector.
- Physical dimensions: Width 40 mm, height 125 mm, depth 120 mm.
Technical Summary
| Product type | ***spare part*** SIMATIC S7-300, digital input SM 321, isolated, 16 DI, 48-125 V DC, 1x 20-pole |
|---|---|
| Number of digital inputs | 16 |
| Input voltage type | DC |
| Input voltage rated value | 48 V; 48 V DC to 125 V DC |
| Load voltage L+ rated value | 48 V |
| Backplane bus current | 40 mA |
| Power loss, typ. | 4.3 W |
| Input current for signal "1", typ. | 3.5 mA |
| Connection method required front connector | 20-pin |
Applications
- DC digital input signal acquisition: For reading 16 DC digital input signals in a SIMATIC S7-300 setup.
- 2-wire sensor connection: For connecting 2-wire sensor signals to the digital inputs.
Frequently Asked Questions
What is Siemens 6ES7321-1CH20-0AA0?
It is a SIMATIC S7-300 digital input SM 321, isolated, with 16 DI and 48-125 V DC input range.
How many digital inputs does 6ES7321-1CH20-0AA0 have?
It has 16 digital inputs.
What front connector is required for 6ES7321-1CH20-0AA0?
A 20-pin front connector is required.
What is the input voltage range for 6ES7321-1CH20-0AA0?
The input voltage is DC, with a rated value of 48 V and a permissible range of 48 V DC to 125 V DC.
