KL2828

The Beckhoff KL2828 digital output terminal, part of the KL Analog Input Modules series, delivers robust switching capabilities for industrial automation applications. Designed and manufactured by Beckhoff, the KL2828 features 8 digital output channels with low-side switching of 24 V DC and provides reverse polarity protection to safeguard connected loads. Each channel supports an output current of 0.5 A, while the module’s aggregate capacity reaches 10 A total load current. The compact housing facilitates space-saving installations on a 35 mm DIN rail with a width of only 12 mm, enabling efficient rack occupancy.

The KL2828’s detailed technical specifications reflect its high performance and reliability in distributed control systems. It utilizes a direct plug-in technique for conductor connections and achieves electrical isolation of approximately 500 V between field and bus contacts. Typical current consumption from the E-bus is 70 mA, while the field supply consumption depends on the channel load currents. The terminal operates reliably in temperatures from 0 to 55 °C and maintains an ingress protection rating of IP20 courtesy of its polycarbonate housing. Mechanical dimensions are precisely 12 mm (W) x 100 mm (H) x 68 mm (D), and the unit weighs approximately 70 grams. It supports cable cross-sections of 0.08–1.5 mm² for solid conductors and 0.25–1.5 mm² for stranded wires.

Operational features of the KL2828 ensure seamless performance under varying load conditions. Each output channel includes short-circuit and overload protection (nominal breaking energy <1.2 J per channel) with a typical short-circuit current of under 40 A to prevent damage during fault conditions. Signal status is clearly indicated by dedicated LEDs, providing immediate visual feedback for troubleshooting. The module drives loads of capacitive, inductive, and resistive types, delivering a logical ‘0’ voltage range of 0–5 V and ‘1’ voltage range of 15–30 V at a nominal switching voltage of 24 V DC (-15%/+20%). No software address or configuration is required, streamlining commissioning and reducing setup time.

Integration of the KL2828 into Beckhoff’s Bus Terminal architecture offers plug-and-play compatibility with the K-bus backplane, facilitating scalable automation solutions. The modular design supports distributed I/O layouts, minimizing cabling complexity and enabling installation close to field devices. Target applications include factory and process automation, machine building, and building management systems where reliable digital outputs and compact form factors are essential. Beckhoff’s KL2828 delivers dependable switching performance and straightforward integration in diverse industrial environments.