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BECKHOFF EL1809 is a 16-channel digital input EtherCAT terminal designed for 24 V DC signal acquisition with 3 ms input filtering. It offers compact, high-density input capability for distributed automation systems.
� BECKHOFF EL1809 Digital Input Terminal
The EL1809 acquires binary 24 V DC control signals from the field and transmits them in an electrically isolated form to the higher-level controller via EtherCAT. It is ideal for space-constrained control cabinets and supports single-wire connection for efficient wiring.
Key Specifications
| Attribute | Specification |
|---|---|
| Series | EtherCAT Terminal (EL1xxx) |
| Model | EL1809 |
| Input Channels | 16 digital inputs |
| Input Voltage | 24 V DC (–15% / +20%) |
| Input Current | 3 mA per channel |
| Input Filter | 3 ms (debounce) |
| Input Type | Type 1/3 per EN 61131-2 |
| Electrical Isolation | 500 V (E-bus/field voltage) |
| Connection Type | Direct plug-in (solid wire) or spring (stranded) |
| Power Contacts | Loop-through (not used for input power) |
| Current Consumption (E-bus) | Typ. 140 mA |
| Current Consumption (Power Contacts) | Typ. 35 mA |
| Bit Width in Process Image | 16 input bits |
| Protection Class | IP20 |
| Mounting | DIN rail |
| Dimensions (W × H × D) | 12 mm × 100 mm × 68 mm |
Application Areas
- High-density digital input acquisition in automation systems
- Monitoring of sensors, switches, and binary field devices
- Space-optimized control cabinets and distributed I/O stations
- Machine tools, packaging lines, and process automation
Related Beckhoff Modules
| Model | Key Differences |
|---|---|
| EL1808 | 8-channel version with same input specs |
| EL1819 | 16-channel HD input with 10 µs filter |
| EL1008 | Basic 8-channel input without filtering |
| EL1904 | 4-channel digital input with TwinSAFE safety |
| EL1809-0020 | Variant with enhanced diagnostics |
All models share:
- EtherCAT compatibility
- Compact form factor
- Tool-free wiring options
VN 20789 
AR 4696 
BR 2840 
US 2749 
CN 2490 
EC 1608 
RU 1026 
CO 1002 
