Description
S7-400 digital input module SM 421. 32 inputs 24VDC. For S7-300/400 racks in legacy installations.
SM 421-1 32x DI 24VDC
32-channel DI 24VDC for S7-400 rack
Additional information
| Brand | Siemens |
|---|---|
| Automation Category | Advanced PLCs |
| Series | S7-400 (Legacy) |
| Product Type | Signal Module – DI |
| Part Number | 6ES7421-1BL01-0AA0 |
