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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.

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⚙️ 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

 

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✅ 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

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🔁 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