KV-N24AR Keyence KV Nano Relay PLC

Keyence KV-N24AR Programmable Controller

Product Introduction

The KV-N24AR is a terminal-block type programmable controller in the Keyence KV Nano series. Specifically, the "R" suffix identifies relay outputs, which switch both AC and DC loads without external interface relays. In addition, the unit integrates 14 input points and 10 output points on a single compact chassis. Therefore, machine builders can simplify panel design and cut wiring time on small equipment. The KV-N24AR also accepts up to 8 expansion units through its backplane, so the system can grow to 256 I/O points as requirements expand.

Technical Specifications

This controller operates on a supply voltage of 100 to 240 VAC with a tolerance of +10%/-15%. As a result, it connects directly to standard industrial mains without an external transformer. Besides, it supplies a 24 VDC output power rated at 0.6 A for sensors and small auxiliary loads. The output circuits use relay contacts, which handle mixed AC/DC loads and provide complete isolation between the controller and the field device. Consequently, this output type suits applications with low switching frequency and varied load voltages.

Processing and Programming

Program capacity reaches 8k steps, with a basic instruction speed of 50 ns minimum and an application instruction speed of 170 ns minimum. Moreover, this throughput keeps scan times short even when the program includes timers, counters, and data comparison logic. Users program the KV-N24AR with Expanded Ladder, KV Script, or mnemonic instructions through Keyence KV STUDIO software.

Positioning and Counting

For motion tasks, the KV-N24AR provides 2 axes of positioning pulse output at up to 100 kHz. Meanwhile, the high-speed counter block supports 2 points of 32-bit auto-reset counting at 100 kHz single-phase or 50 kHz phase-difference input. These functions cover encoder feedback, speed measurement, and simple stepper or servo indexing.

Communication and Expansion

A built-in RS-232C modular port handles KV STUDIO programming and no-protocol serial links to barcode readers or weight indicators. Furthermore, optional communication modules can be mounted on the backplane when the application needs extra serial channels or network connectivity.

Mechanical and Environmental Parameters

The KV-N24AR operates from 0 to +55°C without freezing and tolerates 5 to 95% RH without condensation. Storage temperature ranges from -25 to +75°C. The unit resists vibration at 5–9 Hz with 3.5 mm amplitude and 9–150 Hz at 9.8 m/s² intermittently, plus shock of 150 m/s² for 11 ms in three axes. In addition, noise immunity meets IEC standards at 1500 Vp-p, and insulation resistance stays at 50 MΩ or higher at 500 VDC. The unit weighs approximately 0.47 kg, and Keyence confirms active production status.

Installation Guide

First, secure the KV-N24AR to a DIN rail or a flat panel using the mounting holes. Next, wire the 100–240 VAC supply to the power terminals and confirm a solid ground connection. After that, connect input devices to the 14 input terminals and load devices to the 10 relay output terminals, keeping AC and DC circuits properly separated. Besides, leave ventilation clearance around the housing and route signal wires away from power cables. Finally, plug the RS-232C cable into a PC running KV STUDIO to download and test the program.

Packaging List

• 1 × Keyence KV-N24AR PLC Base Unit

• 1 × Terminal block cover (pre-installed)

• 1 × Quick start guide

• 1 × Mounting bracket set

FAQ

Q1: What does the "R" in KV-N24AR mean?
The "R" indicates relay outputs. These contacts switch both AC and DC loads, unlike the transistor outputs on the KV-N24AT and KV-N24ATP variants.

Q2: How many I/O points can the KV-N24AR support in total?
The base unit provides 14 inputs and 10 outputs. With up to 8 backplane expansion units, the system reaches 256 I/O points excluding the base unit's own I/O.

Q3: Which software programs the KV-N24AR?
Keyence KV STUDIO is the standard configuration tool. It supports ladder editing, simulation, and program transfer over the built-in RS-232C port.

Q4: Can this PLC control two axes of motion?
Yes. The KV-N24AR provides 2-axis pulse output at up to 100 kHz, which is adequate for simple stepper or servo positioning tasks.

Q5: How do you ship the KV-N24AR?
We ship each unit through Fedex, UPS, or DHL. Protective foam and a sturdy carton guard the controller against transit damage.