Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Module type | SIMATIC S7-300 SM 321 digital input |
| Digital input channels | 32 |
| Input voltage | 120 V AC; 47 … 63 Hz |
| Signal "0" | 0 to 20V |
| Signal "1" | 74 to 132V |
| Front connector | 40-pin |
| Backplane bus input current, max. | 16 mA at 5 V DC |
| Power loss, typ. | 4 W |
Applications
- Digital AC signal acquisition: Acquires 120 V AC digital input signals through 32 digital input channels.
Key Features
- Digital input channels: 32 digital inputs for 120 V AC signals.
- Input voltage: Rated input voltage: 120 V AC at 47 … 63 Hz; signal "0": 0 to 20V; signal "1": 74 to 132V.
- Connection: Required front connector: 40-pin.
- Isolation: The digital inputs are not isolated between channels; isolation from the backplane bus uses an optocoupler. Isolation is tested with 2 500 V DC.
- Status indication: A green digital-input status indicator is provided per channel. Diagnostic function, diagnostic alarms, and hardware interrupts are not available.
- Installation limits: Maximum inputs: 32 with horizontal installation up to 40 °C, 24 with horizontal installation up to 60 °C, and 32 with vertical installation up to 40 °C.
Frequently Asked Questions
1. How many digital inputs does the 6ES7321-1EL00-0AA0 have?
It has 32 digital inputs.
2. What input voltage does this module support?
Its rated input voltage is 120 V AC at 47 … 63 Hz. Signal "0" is 0 to 20V, and signal "1" is 74 to 132V.
3. Which connector is required?
A required 40-pin front connector is used.
4. Does the module provide diagnostics or alarms?
It has no diagnostics function, diagnostic alarm, hardware interrupt, or alarm.
5. What should be verified before requesting a quote?
Verify the 120 V AC input requirement, 32-channel count, required 40-pin front connector, and installation condition: horizontal installation supports 32 inputs up to 40 °C, or 24 up to 60 °C; vertical installation supports 32 up to 40 °C.
