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SIMATIC S7-300, DIGITAL INPUT SM 321, OPTICALLY ISOLATED, FOR EXPANDED TEMPERATURE RANGE, 16 DI, DC 48 - 125V, 20 PIN |
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| Supply voltage |
| Load voltage L+ |
| Rated value (DC) |
48 V |
| permissible range, lower limit (DC) |
48 V |
| permissible range, upper limit (DC) |
125 V |
| Input current |
| from backplane bus 5 V DC, max. |
40 mA |
| Power losses |
| Power loss, typ. |
4.3 W |
| Digital inputs |
| Number of digital inputs |
16 |
| Number of simultaneously controllable inputs |
| all mounting positions |
| up to 40 °C, max. |
16 |
| up to 60 °C, max. |
16 |
| up to 70 °C, max. |
16 |
| horizontal installation |
| up to 50 °C, max. |
8 |
| up to 60 °C, max. |
8 |
| vertical installation |
| up to 40 °C, max. |
8 |
| Input voltage |
| Rated value, DC |
48 V |
| for signal "0" |
-146 to +15 V DC |
| for signal "1" |
30 to 146 V DC |
| Input current |
| for signal "1", typ. |
3.5 mA |
| Input delay (for rated value of input voltage) |
| for standard inputs |
| at "0" to "1", min. |
0.1 ms |
| at "0" to "1", max. |
3.5 ms |
| Cable length |
| Cable length, shielded, max. |
1000 m |
| Cable length unshielded, max. |
600 m |
| Encoder |
| Connectable encoders |
| 2-wire sensor |
Yes |
| Permissible quiescent current (2-wire sensor), max. |
1 mA |
| Isochronous mode |
| Isochronous operation (application synchronized up to terminal) |
No |
| Interrupts/diagnostics/status information |
| Alarms |
| Alarms |
No |
| Diagnostic messages |
| Diagnostic functions |
No |
| Diagnostics indication LED |
| Status indicator digital input (green) |
Yes |
| Galvanic isolation |
| Galvanic isolation digital inputs |
| between the channels |
Yes |
| between the channels, in groups of |
8 |
| between the channels and the backplane bus |
Yes |
| Connection method |
| required front connector |
20-pin |
| Dimensions |
| Width |
40 mm |
| Height |
125 mm |
| Depth |
120 mm |
| Weights |
| Weight, approx. |
200 g |
| Status |
May 13, 2014 |
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