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| Model no | SM 321 DI 32x24V DC | |
| Article No | H7 321-1BL00-0AA0 | |
| Description | 32 point digital input，24DC | |
| Conventional | Dimensions W x H x D | 40x125x117 |
| Power dissipation | Typical value 6.5W | |
| Backplane bus current | 35mA | |
| supply voltage | DC24V | |
| Front connector | 40 pin front connector |
| Digital input | input points | 32 |
| Input Type | Leakage type |
| INPUT VOLTAGE | Rated Value | 24 VDC |
| Signal '0' | - 30 V ~ ＋5 V | |
| Signal '1' | 13V~30V | |
| Input Current | Typical value 7mA |
| Input delay | Jump from '0' to '1' | 1.2ms-4.8ms |
| Jump from '1' to '0' | 1.2ms-4.8ms |
| Electrical isolation | Between channel groups | support |
| Number of points per group between channels | 16 | |
| Between channel and backplane | support |
| Encoder | 2-wire sensor | support |
| Allowable static current (maximum) | max 1.5mA |
| Cable length (meters) | shield | 500 |
| Unshielded | 300 |
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