The Omron NX-AD3604 Machine Automation Controller Analog Input Unit is configured for 2 differential -10 to +10 V measurements with 1/30000 resolution. A 10 μs per-point conversion time supports rapid analog signal acquisition, while ±0.1% overall accuracy provides precise measurement. Synchronous I/O refreshing can coordinate acquisition with controller operation, and Free-Run refreshing enables continuous measurement when synchronization is not required. These characteristics give the NX-AD3604 a specific role in high-resolution voltage acquisition. It connects precision analog measurement with the high-resolution PLC analog range available from Omron industrial automation.