Product Description:

The KL2809 is a digital output terminal produced by Beckhoff. It functions as a 16-channel low-side switch that passes control signals to connected actuators in modular I/O stations. The module is intended for cabinet-mounted automation systems that need many discrete output points in a small footprint. It is suited to switching relays, solenoids, indicator lamps, and similar field devices. Galvanic separation between the controller and output side also helps isolate the control electronics from the field wiring.

It operates from a nominal supply of 24 V DC, aligning with common PLC rails, and each channel can switch up to 0.5 A/ch so coils or lamps can be driven directly. The terminal provides 16 outputs, and the process image width is 16 bits for deterministic updates. It draws 35 mA from the K-bus, leaving current budget for additional terminals in the same station. Because the enclosure carries an IP20 rating, the unit must be installed inside a cabinet. Reverse polarity protection helps prevent wiring damage, and an internal fuse limits short-circuit current to less than 2 A. Ohmic, inductive, and lamp loads are switched through a 1-wire connection that keeps installation simple. The bit-oriented process image allows the controller to update output states directly without analog scaling.

The housing measures 12 × 100 × 68 mm, matching the Bus Terminal profile and allowing side-by-side stacking on a 35 mm DIN rail without overhang. The carrier is molded from Polycarbonate, which keeps weight low and provides basic flame resistance. Switching energy stays below 150 mJ/channel, which helps limit voltage spikes when inductive loads are de-energized. Internal logic maps each channel to one bit, so controller code can address outputs sequentially without remapping. Its slim housing supports dense terminal rows where panel depth and rail space are limited.