Programmable Logic Controller PLC Featuring Pluggable KL4424 Terminal Blocks for Simplified Maintenance and 8 Channel Output

I. Core Basic Information

• Brand / Model: Beckhoff KL4424

• Product Category: K-bus terminal block, 4-channel single-ended analog current output module

• Signal Type: 4–20 mA current signal (industry standard)

• Power Supply: K-bus power supply + external 24 V DC power contacts (can be replaced with 15 V DC via KL9515)

• Mounting: 35 mm DIN rail (EN 60715), 12 mm width

• Product Status: In production, regularly supplied Beckhoff

• Pluggable Version: KS4424 (pluggable terminal blocks for easy maintenance)

• Wiring Method: 2-wire, single-ended common ground

II. Key Technical Parameters

Table



Parameter Value Number of Output Channels
4 channels (Single-ended)
Signal Range
4 mA ～ 20 mA
Resolution
12 bitBeckhoff
Output Accuracy
< ±0.1% FS (Full Scale)
Switch Time
Approx. 4 ms / Channel
Maximum Load
< 350 Ω (Short Circuit Protection)
Electrical Isolation
K-bus / Signal Side: 500 V DC
K-bus Current Consumption
Typical 20 mA (5 V)
External Power Consumption
Typical 60 mA + Load Current (24 V)
Process Imaging
Output: 4 × 16-bit Data (Optional 4 × 8-bit Control/Status)
Weight
Approx. 75 g
Dimensions
12 mm × 100 mm × 68 mm
Operating Temperature
0 ～ +55°C; Storage: -25 ～ +85°C
Relative Humidity
95%, Non-condensing
Protection Rating
IP20
III. Functions and Features
• 2-Wire Current Output: 4 The outputs share a common 0V reference ground, simplifying wiring and making it suitable for long-distance transmission.

• Plug and Play: No address or configuration settings required; simply power on to operate.

• Status Indication: Each channel has an independent LED for intuitive display of data exchange status.

• Short Circuit Protection: Built-in short circuit protection at the output terminals prevents damage to the module from load failures.

• High-Density Design: The 4 channels are only 12 mm wide, suitable for dense installation within control cabinets.

• Application Scenarios: Used for controlling regulating valves, frequency converters, positioners, current-type meters, and other equipment.