KL3404-0018 Beckhoff
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The Beckhoff KL3404-0018 is part of the KL Analog Input Modules series, featuring four single-ended analog inputs with a ±10 V signal voltage and 12-bit resolution. It is constructed with a polycarbonate housing, mounts on a 35 mm DIN rail, and operates with an internal common ground reference. The module uses a K-bus power supply and provides 4 x 16 bit user data for process image inputs.
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Product Description:
The KL3404-0018 is a four-channel voltage acquisition module manufactured by Beckhoff in the KL Analog Input Modules series. Intended for distributed I/O stations, it converts field-level sensor voltages into digital data that a controller on the K-bus can process. By placing the A/D converter directly on the DIN rail, the unit reduces wiring length and helps limit the effect of electrical noise in industrial automation cells. This local conversion approach is useful where analog signals pass through cabinets that also contain contactors, drives, and other sources of interference.
It digitizes each channel at a resolution of 12-bit, so every sample is divided into 4096 steps across the full-scale range. The module provides 4 individual inputs that share a common internal ground and accept a range of ±10 V, allowing connection to standard process transducers. Because the measurement path is single-ended, only the positive lead and common return are required, so installation follows the two-wire wiring style used for this product type. Mechanical integration is simple because the terminal snaps onto a 35 mm DIN rail. Electrical power and backplane communication are both supplied by the K-bus, which eliminates separate supply cabling and lets the host controller access each converted value. The shared ground arrangement is suited to sensors that reference the same potential inside a compact control cabinet.
The terminal normally transfers 4 × 16-bit user data, giving the controller full-word accuracy for each reading, and it can also use one byte of control and one byte of status per channel when the optional 4 × 8-bit area is enabled. Status visibility is supported by four front-mounted Run LEDs, and the enclosure meets IP20 and is molded from polycarbonate to protect the electronics against accidental finger contact. The channel LEDs make it easier to see active signal paths during normal machine operation, while the process values remain available to the PLC without extra interface hardware in the I/O station.
Frequently Asked Questions about KL3404-0018:
Q: How many input channels are available on the KL3404-0018 module?
A: The KL3404-0018 analog input module supports up to four input channels.
Q: What input voltage range does the KL3404-0018 support?
A: This module accepts signal voltages in the range of ±10 V for each input.
Q: What is the analog input resolution of the KL3404-0018?
A: The signal resolution for this module is 12 bits, allowing for precise measurement of analog signals.
Q: What type of mounting does the KL3404-0018 support?
A: The KL3404-0018 is designed for mounting on a 35 mm DIN rail.
Q: How is the operational status of inputs displayed on the KL3404-0018?
A: This module features four run LEDs to indicate the operational status of each input channel.
