Siemens 6ES7321-7BH00-0AB0
MPN6ES7321-7BH00-0AB0
End of Life
SIMATIC S7-300, DIGITAL INPUT SM 321, OPTICALLY ISOLATED, 16 DI, DC 24V, 20 PIN, PROCESS INTERRUPT, DIAGNOSTICS
$188.66Ref. 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 |
| Input voltage at signal "1" | 13 to 30V |
| Input voltage at signal "0" | -30 to +5 V |
| Permissible range, lower limit (DC) | 20.4 V |
| Permissible range, upper limit (DC) | 28.8 V |
| Input current at signal "1" (typ.) | 7 mA |
| Power loss (typ.) | 4 W |
| Current consumption from backplane bus (5 V DC), max. | 55 mA |
| Permissible quiescent current, 2-wire sensor, max. | 1.5 mA |
| Cable length, unshielded, max. | 600 m |
| Cable length, shielded, max. | 1 000 m |
Timing
| Parameter | Value |
|---|---|
| Input delay, parameterizable values | Yes; 0.1 / 0.5 / 3 / 15 / 20 ms |
Diagnostics & Isolation
| Parameter | Value |
|---|---|
| Diagnostics function | Yes; internal/ external fault |
| Diagnostic alarm | Yes |
| Hardware interrupt support | Yes |
| Isolation between channels and backplane bus | Yes; Optocoupler |
| Isolation test voltage | 500 V DC |
| Channels per isolated group | 16 |
Mechanical
| Parameter | Value |
|---|---|
| Depth | 120 mm |
| Height | 125 mm |
| Width | 40 mm |
MPN
6ES7321-7BH00-0AB0