![[OMRON] — NX-CT High-speed Counter Unit (NX Series, 2Ch, 1MHz/4MHz, NPN/PNP, 5V/24V or RS-422)](https://prosourcemro.com/wp-content/uploads/2026/05/001-615-1024x1024.png)
Counter
Omron
[OMRON] — NX-CT High-speed Counter Unit (NX Series, 2Ch, 1MHz/4MHz, NPN/PNP, 5V/24V or RS-422)
Family ID: OMRON-NX-CT
High-speed counter unit ideal for edge control, achieving high-speed response and high-resolution performance. 2 channels (6ch mode available). Up to 4 MHz response frequency. Free-Run, Synchronous I/O, and Task period prioritized refreshing. 5V/24V voltage input and RS-422 Line receiver input variants.
4 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| NX-CT2120 | 2Ch NPN, 6 NPN inputs, 6 NPN outputs, 1MHz max, 5V/24V voltage input | OMRON | Type: High-speed Counter Unit | Channels: 2 (NPN) / 6ch mode available | External Inputs: 6 (NPN) | External Outputs: 6 (NPN) | Max Response Frequency: 1MHz (100kHz in 6ch mode) | Input Method: 5V/24V Voltage Input | I/O Refresh: Free-Run / Synchronous / Task period prioritized | ||
| NX-CT2220 | 2Ch PNP, 6 PNP inputs, 6 PNP outputs, 1MHz max, 5V/24V voltage input | OMRON | Type: High-speed Counter Unit | Channels: 2 (PNP) / 6ch mode available | External Inputs: 6 (PNP) | External Outputs: 6 (PNP) | Max Response Frequency: 1MHz (100kHz in 6ch mode) | Input Method: 5V/24V Voltage Input | I/O Refresh: Free-Run / Synchronous / Task period prioritized | ||
| NX-CT2320 | 2Ch, 6 NPN inputs, 6 NPN outputs, 4MHz max, RS-422 Line receiver input | OMRON | Type: High-speed Counter Unit | Channels: 2 / 6ch mode available | External Inputs: 6 (NPN) | External Outputs: 6 (NPN) | Max Response Frequency: 4MHz (100kHz in 6ch mode) | Input Method: RS-422 Line Receiver Input | I/O Refresh: Free-Run / Synchronous / Task period prioritized | ||
| NX-CT2420 | 2Ch, 6 PNP inputs, 6 PNP outputs, 4MHz max, RS-422 Line receiver input | OMRON | Type: High-speed Counter Unit | Channels: 2 / 6ch mode available | External Inputs: 6 (PNP) | External Outputs: 6 (PNP) | Max Response Frequency: 4MHz (100kHz in 6ch mode) | Input Method: RS-422 Line Receiver Input | I/O Refresh: Free-Run / Synchronous / Task period prioritized |
