KEYENCE KV-N3AM / KV-N8EXT / KV-N24DT PLC Base Unit & I/O Module | Replacement, Equivalent & Selection Guide
The KEYENCE KV-N Series — comprising the KV-N3AM (base CPU unit), KV-N8EXT (8-point I/O expansion unit), and KV-N24DT (24-point DC transistor I/O unit) — delivers compact, high-speed programmable logic control for industrial automation. Konmask.com stocks and sources these modules for OEM replacement, system expansion, and new installations.
Technical Specifications
- KV-N3AM — PLC Base CPU Unit; KV-N Series; compact DIN-rail mount; supports ladder/structured text; built-in USB programming port; DC 24V power supply
- KV-N8EXT — 8-Point I/O Expansion Unit; 4 inputs / 4 outputs (transistor); plug-in expansion to KV-N3AM base; DC 24V; IP20
- KV-N24DT — 24-Point DC Transistor I/O Unit; 16 inputs / 8 outputs; NPN transistor output; DC 24V; high-speed response; DIN-rail mount
- Series: KEYENCE KV-N
- Communication: USB (programming), optional RS-232C / Ethernet via expansion
- Weight: approx. 700 g (combined set)
- Standards: CE, UL (verify current certification sheet)
Compatible Replacement & Equivalent Models
| Original Model | Compatible / Equivalent | Notes |
|---|---|---|
| KV-N3AM | KV-3000, KV-700 (older gen) | Verify I/O count and program capacity before substitution |
| KV-N8EXT | KV-8EXT, KV-E8XT | Check connector pinout compatibility |
| KV-N24DT | KV-24DT, KV-N24DR (relay output variant) | DT = transistor; DR = relay — confirm output type |
Contact support@konmask.com for cross-reference verification before ordering a replacement.
Why Choose the Original Model
- Guaranteed firmware and ladder-program compatibility with existing KEYENCE KV-N installations
- Factory-calibrated I/O response times — no re-tuning required
- Full KEYENCE technical support and documentation coverage
- Seamless plug-in expansion without additional configuration
- Longer service life with genuine KEYENCE components
Typical Applications
- Conveyor and material-handling control
- Packaging machine sequencing
- Assembly line I/O monitoring
- Small-to-mid scale factory automation cells
- OEM machine builders requiring compact PLC footprint
System Compatibility
- Programming Software: KEYENCE KV STUDIO (free download)
- Expansion Bus: KV-N Series expansion units (KV-N8EXT, KV-N16EX, KV-N24DT, etc.)
- Communication Modules: KV-EP21V (Ethernet), KV-L21V (RS-232C/422)
- HMI: KEYENCE VT Series, compatible third-party Modbus HMIs
- Power Supply: DC 24V ±10%
Selection Guide
| Requirement | Recommended Model |
|---|---|
| Standalone CPU with minimal I/O | KV-N3AM |
| Add 8 I/O points to existing KV-N3AM | KV-N8EXT |
| Standalone 24-point transistor I/O unit | KV-N24DT |
| Need relay output instead of transistor | KV-N24DR (contact us) |
| Higher I/O count (>64 points) | Upgrade to KV-5500 / KV-7500 series |
Quality Assurance & Sourcing
- All units inspected and function-tested prior to shipment
- Sourced from authorized distributors and verified secondary-market channels
- Packaging integrity checked; firmware version documented on request
- Certificate of conformance available for industrial procurement requirements
- Warranty: 90-day replacement guarantee on all stocked units
How to Order
- Confirm the exact model number (KV-N3AM, KV-N8EXT, or KV-N24DT)
- Specify quantity and required delivery timeline
- Add to cart directly, or contact us for bulk / urgent orders
- For cross-reference or replacement verification, email support@konmask.com with your existing part number
Replacement & Compatibility FAQ
Q: Can KV-N8EXT be used with an older KV-700 base unit?
A: No — the KV-N8EXT is designed for the KV-N Series bus. Use KV-8EXT for KV-700 systems.
Q: Is KV-N24DT compatible with AC loads?
A: No — the DT variant uses NPN transistor outputs (DC only). For AC loads, select the KV-N24DR relay output model.
Q: Can I program KV-N3AM with KV STUDIO on Windows 11?
A: Yes — KV STUDIO v11 and above supports Windows 10/11 (64-bit).
Q: What is the maximum number of expansion units for KV-N3AM?
A: Up to 7 expansion units can be connected, providing a maximum of approx. 64 I/O points.
Q: Do you provide a datasheet or wiring diagram?
A: Yes — contact support@konmask.com and we will provide the relevant KEYENCE documentation.
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Contact: support@konmask.com | +0086 19859288691
