Beckhoff KL1408 Bus Terminal

The Beckhoff KL1408 is an 8-channel digital input terminal designed to acquire binary 24 V DC signals from field devices and transmit them electrically isolated to a central controller. With a 3.0 ms input filter and EN 61131-2 Type 1/3 compliance, it ensures accurate signal detection without the influence of mechanical switch bounce.

Each channel is equipped with an LED for visual state indication, while the 1-wire configuration allows efficient, space-saving wiring. Ideal for PLC-based control systems requiring reliable digital input acquisition.

Technical Specifications

Model: KL1408 Beckhoff
Number of Inputs: 8
Connection Technology: 1-wire
Input Specification: EN 61131-2, Type 1/3
Nominal Voltage: 24 V DC (-15%/+20%)
“0” Signal Voltage: -3…+5 V
“1” Signal Voltage: 11…30 V
Input Filter Time: Typ. 3.0 ms
Input Current: Typ. 3 mA (EN 61131-2, Type 3)
Bit Width in Process Image: 8 inputs
Electrical Isolation: 500 V (K-bus/field potential)
Current Consumption (K-bus): Typ. 5 mA
Current Consumption (Power Contacts): Typ. 2 mA + load
Configuration: No address or configuration setting

Functionality & Features

Special Features:
– 3 ms input filter prevents bouncing from mechanical switches
– Type 1/3 input specification for wide signal compatibility
Status Indicators: LED per input channel
Power Contacts: Loop-through
Pluggable Wiring: Compatible with all KSxxxx terminals
Wiring Method: 1-wire for efficient input signal routing

Electrical & Installation

Terminal Design: Compact terminal housing with signal LEDs
DIN Rail Mounting: 35 mm, EN 60715 compliant
Wiring Method: Spring-actuated terminals via screwdriver
Connection Cross-Section (KL-12-8pin):
– Solid: 0.08…2.5 mm²
– Flexible: 0.08…2.5 mm²
– Ferrule: 0.14…1.5 mm²
AWG Equivalent: AWG28…14 (solid/flex), AWG26…16 (ferrule)
Stripping Length: 8–9 mm
Max Current Load (Power Contacts): 10 A

Mechanical & Environmental

Dimensions (W × H × D): 12 × 100 × 68 mm
Net Weight: Approx. 55 g
Material: Polycarbonate
Operating Temperature: -25°C to +60°C
Storage Temperature: -40°C to +85°C
Relative Humidity: 95%, non-condensing
Protection Rating: IP20
Installation Position: Variable
Vibration/Shock Resistance: EN 60068-2-6 / EN 60068-2-27

Certifications & Compliance

CE Marked: Yes
UL, CCC, ATEX, IECEx, DNV GL: Certified
ATEX Certification: II 3 G Ex ec IIC T4 Gc
IECEx Certification: Ex ec IIC T4 Gc
RoHS & WEEE: Compliant

Key Features & Benefits

✅ 8 Digital Inputs: Compact and efficient signal acquisition.

✅ 3 ms Filter Time: Eliminates mechanical switch bounce.

✅ EN 61131-2 Compliance: Type 1/3 voltage range compatibility.

✅ LED Status Indication: Per-channel diagnostics.

✅ Space-Saving Design: 12 mm width for dense I/O configurations.

✅ Certified for Global Use: CE, UL, ATEX, IECEx, DNV.

📦 Buy Beckhoff KL1408 Digital Input Terminal at Drive Outlet Megastore

At Drive Outlet Megastore, we offer unbeatable Beckhoff KL1408 prices.

The KL1408 is the reliable solution for capturing field-level digital signals in a compact and certified I/O architecture—ideal for machine builders, OEMs, and integrators.

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Supplied with full 2-year warranty and fast UK delivery.