Keyence KV-N40DT Transistor Output PLC

Keyence KV-N40DT PLC: Fast Transistor Outputs for Compact Machines

The KV-N40DT belongs to the Keyence KV Nano series of all-in-one terminal block PLCs. This base unit suits small to medium machines that demand fast, repeatable discrete control. It combines a 24 VDC supply with 24 input points and 16 MOSFET transistor outputs. Because transistor outputs switch far faster than relay contacts, the KV-N40DT fits high-cycle sorting, packaging, and electronic assembly equipment.

Technical Specifications of the KV-N40DT

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 transistor output is a sink (NPN) MOSFET rated at 30 VDC, 0.5 A per point. This design drives DC solenoids, pilot valves, and solid-state relays directly. Additionally, the sink configuration suits common-negative DC wiring found in most Asian machine panels. However, inductive loads require flyback diodes to protect the output stage. Therefore, users should confirm load current before wiring multiple devices to one point.

I/O Expansion and Communication

Users can attach up to eight expansion units to the KV-N40DT, 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-N40DT 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-N40DT

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 DC loads to the 16 transistor terminals while adding flyback diodes on inductive devices. Finally, link the RS-232C port to a PC for programming via KV STUDIO.

Packaging List

• Keyence KV-N40DT 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-N40DT use?
The KV-N40DT provides MOSFET transistor outputs in a sink (NPN) configuration. Each point handles 30 VDC at 0.5 A.

Q2: How does the KV-N40DT differ from the KV-N40AR?
The KV-N40DT runs on 24 VDC and uses transistor outputs. By contrast, the KV-N40AR accepts AC power and switches relay contacts.

Q3: Can the KV-N40DT 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-N40DT. 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.