6ES7321-1CH00-0AA0 - Siemens
MPN6ES7321-1CH00-0AA0
End of Life
SIMATIC S7-300, Digital input SM 321, isolated, 16 DI, 24-48 V AC/DC with single rooting, 1x 40-pole
$323.01 – $492.00Ref. price · indicative, final on quote
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jun 2026
Specifications
Inputs
| Parameter | Value |
|---|---|
| Number of digital inputs | 16 |
| Max. inputs, up to 40 °C | 16 |
| Max. inputs, up to 60 °C | 16 |
| 2-wire sensor support | Yes |
Electrical
| Parameter | Value |
|---|---|
| Rated value (DC) | 24 V; DC 24 or 48 V |
| Input voltage at signal "1" | 14V AC to 60V AC |
| Input voltage type (AC/DC) | AC/DC |
| Input voltage at signal "0" | -5V AC to +5V AC |
| Permissible range, lower limit (DC) | 24 V |
| Permissible range, upper limit (DC) | 48 V |
| Input current at signal "1" (typ.) | 2.7 mA |
| Input current at signal "0", max. (permissible quiescent current) | 1 mA |
| Power loss (typ.) | 1.5 W; at 24 V; 2,8 W at 48 V |
| Current consumption from backplane bus (5 V DC), max. | 100 mA |
| Permissible quiescent current, 2-wire sensor, max. | 1 mA |
| Cable length, unshielded, max. | 600 m |
| Cable length, shielded, max. | 1 000 m |
Timing
| Parameter | Value |
|---|---|
| Input delay 0 to 1, min. | 16 ms |
| Input delay 0 to 1, max. | 16 ms |
| Input delay 1 to 0, max. | 16 ms |
| Input delay, parameterizable values | No |
Diagnostics & Isolation
| Parameter | Value |
|---|---|
| Diagnostics function | No |
| Diagnostic alarm | No |
| Hardware interrupt support | No |
| Isolation between channels | Yes |
| Isolation between channels and backplane bus | Yes; Optocoupler |
| Isolation test voltage | 1 500 V AC |
| Channels per isolated group | 1 |
| Status indicator per channel (green) | Yes |
Mechanical
| Parameter | Value |
|---|---|
| Depth | 120 mm |
| Height | 125 mm |
| Width | 40 mm |
Specifications
| Parameter | Value |
|---|---|
| Rated value (AC) | 24 V; 24 V AC or 48 V AC (0 ... 63 Hz) |
MPN
6ES7321-1CH00-0AA0