Beckhoff KL1404 Digital Input Terminal

The Beckhoff KL1404 is a 4-channel digital input Bus Terminal designed for acquiring 24 V DC binary control signals from the process level and transmitting them to higher-level automation systems. Featuring 3 ms input filters, it effectively eliminates contact bounce from mechanical switches, ensuring clean and stable input readings.

Compliant with EN 61131-2 type 1/3 standards, the KL1404 uses 2-wire connection technology and provides full 500 V electrical isolation. Each channel includes an LED indicator for fast signal diagnostics, making it ideal for compact, decentralized control architectures.

Technical Specifications

Part Number: KL1404 Beckhoff
Technology: Digital input
Number of Inputs: 4 channels
Connection Technology: 2-wire
Nominal Voltage: 24 V DC (-15% / +20%)
Signal Voltage “0”: -3…+5 V (EN 61131-2, type 1/3)
Signal Voltage “1”: 11…30 V (EN 61131-2, type 3)
Input Filter Time: Typ. 3.0 ms
Input Current: Typ. 3 mA (EN 61131-2, type 3)
Specification Compliance: EN 61131-2, Type 1/3
Bit Width in Process Image: 4 inputs
Configuration: No address or configuration setting

Power & Consumption

Power Supply: 24 V DC via power contacts
Current Consumption (Power Contacts): Typ. 1 mA + load
Current Consumption (K-bus): Typ. 3 mA
Electrical Isolation: 500 V (K-bus / field potential)

Mechanical Specifications

Dimensions (W x H x D): 12 mm × 100 mm × 68 mm
Weight: Approx. 50 g
Material: Polycarbonate
Installation: 35 mm DIN rail (EN 60715)
Design Form: Compact terminal with signal LEDs
Pluggable Wiring: Compatible with all KSxxxx terminals
Wiring Method:
– Solid (s): 0.08…2.5 mm²
– Flexible (st): 0.08…2.5 mm²
– Ferrule (f): 0.14…1.5 mm²
AWG Range:
– Solid/Flexible: AWG28…14
– Ferrule: AWG26…16
Stripping Length: 8…9 mm

Environmental Conditions

Operating Temperature: 0°C to +55°C
Storage Temperature: -25°C to +85°C
Relative Humidity: 95%, no condensation
Vibration/Shock Resistance: EN 60068-2-6 / EN 60068-2-27
EMC Standards: EN 61000-6-2 / EN 61000-6-4
Protection Rating: IP20
Installation Position: Variable

Certifications & Compliance

Approvals: CE, CCC, UL, ATEX, IECEx, DNV GL
Ex Marking:
– ATEX: II 3 G Ex ec IIC T4 Gc
– IECEx: Ex ec IIC T4 Gc

Features & Benefits

✅ 4 Input Channels: Capture multiple signals in a single compact unit.

✅ Debounce Protection: 3 ms input filter eliminates switch bouncing.

✅ Type 1/3 Compliant: Meets EN 61131-2 for automation compatibility.

✅ Space-Efficient: 12 mm housing ideal for dense cabinet layouts.

✅ Diagnostic LEDs: Instant visual indication of signal states.

✅ Safe & Isolated: 500 V electrical isolation protects upstream devices.

📦 Buy Beckhoff KL1404 Digital Input Terminals – In Stock Now

At Drive Outlet Megastore, we offer unbeatable Beckhoff KL1404 prices. For reliable and noise-free 24 V DC signal acquisition, the KL1404 delivers compact and compliant performance for industrial automation systems.

Click here to get a quote or check availability.

Ships fast from the UK. Backed by our 2-year warranty. Trusted grey market pricing.