| Model no | EM221 DI8×24V DC | |
| Article No | H7 221-1BF22-0XA0 | |
| Description | 8-point digital input, optocoupler isolation，24VDC | |
| Conventional norm | Dimensions WxHxD（mm） | 46x80x62 |
| Power dissipatio | 2W | |
| Available current（SM bus ） | 40mA | |
| Available current（Sensor power 24V） | Input 4mA per point used |
| Digital input | Input points | 8 |
| Input type | PNP/NPN | |
| Rated voltage | 24VDC | |
| Maximum continuousallowable voltage | 30VDC | |
| Surge voltage (Maximum) | 35VDC,0.5s | |
| Logic 1 signal (Minimum) | 15VDC | |
| Logic 0 signal (Maximum) | 5VDC | |
| Maximum input delay | 4.5ms | |
| hotoelectric isolation (Field side andLogic side) | 500VAC,1min | |
| Maximum allowable leakage current（Bero） | 1mA |
| The number of inputs that are connected simultaneously | 55° (horizontal) | All |
| 45° (vertical) | All |
| Cable length (meter) | Shield | 500M |
| Unshielded | 300M |
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