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| Place of Origin: | U.K. |
| Brand Name: | Siemens |
| Certification: | COO & COC |
| Model Number: | 6ES7221-1BF22-0XA8 |
6ES7221-1BF22-0XA8 SIEMENS SIMATIC S7-1200 digital input module 8-point source type input
The Siemens SIMATIC S7-1200 digital input module 6ES7221-1BF22-0XA8 is a compact and reliable 8-channel digital input expansion module, specifically designed for source-type (PNP) sensor systems. This module is used to collect high-level effective signals from devices such as buttons, limit switches, proximity switches, and photoelectric sensors, and is widely applied in scenarios such as small and medium-sized mechanical equipment, process control units, building automation, and OEM control cabinets.
Product Overview: Siemens 6ES7221-1BF22-0XA8
| Model Number | 6ES7221-1BF22-0XA8 |
| Series | SIMATIC S7-200 |
| Module Type | Digital Input (DI) Expansion Module |
| Number of Inputs | 8 channels |
| Input Voltage | 24 V DC (nominal), operating range 15–30 V DC |
| Input Logic | Compatible with both sinking (NPN) and sourcing (PNP) sensors |
| Input Filter Delay | Typically 2.5 ms (noise-immune for industrial environments) |
| Connection Type | Removable 8-pin screw terminal block (Phoenix-style) |
| Mounting | Snap-on to S7-200 CPU or other compatible expansion modules (no backplane required) |
| Dimensions (W × H × D) | 46 mm × 80 mm × 62 mm |
| Power Consumption | Draws power from the CPU’s internal 5 V DC bus (approx. 40 mA) |
| Operating Temperature | 0°C to 55°C |
| Isolation | Optocoupler isolation between field wiring and logic circuitry |
Product details pictures
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