KL2872-0010 16-Channel Digital Output Terminal 24 VDC Flat-Ribbon Cable

Product Overview

The KL2872-0010 (KL28720010) is a high-density 16-channel digital output terminal designed for efficient connection to multi-pin interface devices. Utilizing flat-ribbon cable connection technology, this terminal is specifically engineered for the rapid integration of valve terminals, relay modules, and signal distribution blocks. In complex industrial applications such as pneumatic manifold control, modular assembly cells, and specialized laboratory automation, the KL2872-0010 eliminates the need for individual point-to-point wiring, significantly reducing installation time and potential wiring errors. Each of the 16 channels supports up to 0.5 A of output current and is fully short-circuit proof, providing a robust and compact solution for driving ohmic, inductive, and lamp loads within a centralized control architecture.

Technical Configuration

The KL2872-0010 operates on the K-bus system and features a 20-pin flat-ribbon cable interface. This interface allows for a direct, "one-plug" connection to 16 digital outputs, sharing a common ground and power supply across the ribbon. The module is strictly "plug-and-play," requiring no hardware address or configuration settings. Internally, the terminal provides 500 V electrical isolation between the K-bus logic and the field potential, ensuring that high-voltage transients on the output side do not propagate back to the bus coupler or PLC. For hazardous environment operations, the module is certified under ATEX and IECEx (Ex ec IIC T4 Gc), making it suitable for use in Zone 2 locations.

Technical Specifications

Technical FAQs

What are the specific advantages of using the flat-ribbon cable version over standard terminals?

The KL2872-0010 is optimized for "multi-pin" applications. Instead of stripping and terminating 16 individual wires, a single 20-pin ribbon cable connects the PLC terminal directly to a valve manifold or a pre-assembled distribution board. This reduces the footprint in the control cabinet and ensures high-speed maintenance and modular machine construction.

Is the unit protected against inductive kickback from solenoid valves?

Yes, the terminal is designed to drive inductive loads. However, the breaking energy is limited to 100 mJ per channel. For very large inductive loads or high-frequency switching, it is recommended to verify the energy dissipation and, if necessary, add external suppression diodes to protect the output stages.

How does the short-circuit protection behave during a fault?

Each channel is individually short-circuit proof. If a fault occurs, the short-circuit current is limited to less than 7 A. Once the fault is cleared and the internal thermal protection cools down, the output returns to normal operation. This prevents a single failed solenoid from shutting down the entire 16-channel module.

Engineering & Installation Guide

• Ribbon Cable Integrity: Ensure that the 20-pin flat-ribbon cable is properly crimped and that the strain relief is utilized. Standard IDC (Insulation Displacement Connector) technology is sensitive to mechanical pull; avoid sharp bends in the ribbon cable near the connector to prevent intermittent signal loss.

• Power Distribution: The 16 outputs are powered via the terminal's power contacts. Ensure that the preceding power feed terminal (such as a KL9100) is capable of supplying the total simultaneous load. If all 16 channels are active at 0.5 A, the total current draw will be 8 A, approaching the 10 A limit of the power contacts.

• Hazardous Area Mounting: For ATEX/IECEx compliance in Zone 2, the terminal must be installed in an enclosure providing a degree of protection of at least IP54. Ensure that the ribbon cable connection is secure and cannot be accidentally disconnected while the circuit is live.