Keyence KV-N40DR PLC | KV Nano 24-In/16-Out

Keyence KV-N40DR PLC: DC-Powered Control with Relay Outputs

The KV-N40DR belongs to the Keyence KV Nano series of all-in-one terminal block PLCs. This base unit suits small to medium machines that need flexible load switching on a DC supply. It combines a 24 VDC input with 24 input points and 16 relay output points. Because relay contacts handle both AC and DC loads, the KV-N40DR fits panels where mixed voltages appear on the same output group.

Technical Specifications of the KV-N40DR

The controller executes basic instructions in 50 ns and application instructions in 170 ns. Program capacity reaches 16k steps, which supports moderate ladder logic and KV Script routines. Three positioning pulse outputs run at 100 kHz maximum, enabling simple motion tasks without extra modules. Two high-speed counter channels accept 100 kHz single-phase or 50 kHz phase-difference signals for encoder-based measurement.

Output Ratings and Load Handling

Each relay output switches resistive loads up to 2 A at 250 VAC or 2 A at 30 VDC. This rating covers contactors, solenoids, and indicator lamps without interposing relays. Additionally, relay outputs isolate the controller from load voltage, which improves noise immunity. However, mechanical contacts wear under frequent switching. Therefore, users should reserve relay points for low-cycle loads and choose transistor models for high-speed switching.

I/O Expansion and Communication

Users can attach up to eight expansion units to the KV-N40DR, raising total I/O to 256 points beyond the base unit. A built-in RS-232C modular connector supports KV STUDIO programming and no-protocol serial communication. For larger systems, backplane communication modules provide additional connectivity options.

Electrical and Mechanical Parameters

The KV-N40DR operates on 24 VDC with ±10% tolerance. An auxiliary 24 VDC output delivers 0.6 A for sensors or small loads. Operating temperature ranges from 0 to +55 °C, while storage tolerance extends from −25 to +75 °C. Relative humidity must stay between 5 and 95% RH without condensation. Installation altitude must remain below 2000 m.

Installation Guide for the KV-N40DR

First, mount the base unit on a DIN rail or directly onto a panel using the provided mounting holes. Next, connect the 24 VDC supply with correct polarity to avoid damage. Then wire input devices to the 24 input terminals, observing the common configuration. After that, connect output loads to the 16 relay terminals while respecting contact ratings. Finally, link the RS-232C port to a PC for programming via KV STUDIO.

Packaging List

• Keyence KV-N40DR base unit × 1

• Terminal block covers (attached) × 1 set

• Instruction manual (quick reference) × 1

• Mounting brackets × 1 set

Frequently Asked Questions

Q1: What output type does the KV-N40DR use?
The KV-N40DR provides relay outputs. Relay contacts work with both AC and DC load circuits, which adds wiring flexibility.

Q2: How does the KV-N40DR differ from the KV-N40AR?
The KV-N40DR runs on 24 VDC, while the KV-N40AR accepts 100–240 VAC. Both models use relay outputs and share the same I/O count.

Q3: Can the KV-N40DR drive a stepper or servo drive?
Yes. The unit includes three positioning pulse outputs rated at 100 kHz maximum. These outputs support simple point-to-point positioning tasks.

Q4: How many expansion units can connect to this base unit?
Up to eight I/O expansion units attach to the KV-N40DR. This configuration expands system capacity to 256 I/O points excluding the base I/O.

Q5: What shipping methods are available?
We ship orders via Fedex, UPS, and DHL. Delivery times vary by destination and typically range from 3 to 7 business days.