Product Overview
Applications
Suitable for isochronous mode.
Technical Summary
| Product type | SIMATIC S7-300 digital input SM 321 |
|---|---|
| Digital inputs | 16 |
| Rated input voltage | 24 V DC |
| Signal 0 input voltage | -30 to +5 V |
| Signal 1 input voltage | 13 to 30 V |
| Diagnostics | Parameterizable diagnostics, diagnostic alarms, hardware interrupts, and wire-break detection to I< 1 mA |
| Front connector | 20-pin |
| Product lifecycle | Product cancellation |
Key Features
16 digital inputs with no potential separation between channels; inputs are separated from the backplane bus by optocouplers.
Input voltage is DC, with a rated value of 24 V; signal 0 is -30 to +5 V and signal 1 is 13 to 30 V.
Has parameterizable diagnostics, diagnostic alarms, hardware interrupts, wire-break detection to I< 1 mA, and diagnostic information readable.
Supports 2-wire sensors, with a maximum permissible quiescent current of 2 mA; the required front connector is 20-pin.
Supports horizontal or vertical installation with 16 inputs up to 40 °C and up to 60 °C; dimensions are 40 mm wide, 125 mm high, and 120 mm deep.
Product cancellation.
Frequently Asked Questions
What is the exact product identity?
It is Siemens 6ES7321-7BH01-0AB0, a SIMATIC S7-300 digital input SM 321 module.
How many digital inputs does the module have?
It has 16 digital inputs with a rated input voltage of 24 V DC.
What diagnostics and interrupt functions are available?
It has parameterizable diagnostics, diagnostic alarms, hardware interrupts, readable diagnostic information, and wire-break detection to I< 1 mA.
What front connector is required?
The required front connector is 20-pin.
What project details should accompany a quotation request?
Provide the requested quantity, destination, schedule context, and any additional BOM lines.
