Omron NX-RS1201 is a 1‑channel load cell input unit for the NX series I/O system. Converts analog signals from strain‑gauge load cells into digital weight/force values. Input range –5.0 to 5.0 mV/V, 24‑bit A/D converter, 125 µs conversion cycle. Supports 4‑wire and 6‑wire load cell connections. Free‑run, synchronous or task‑period‑prioritized I/O refreshing. Screwless push‑in terminal block, 12 mm width. Applications: Industrial weighing and filling systems Process control and batch weighing Packaging machinery and checkweighers Material handling and force measurement Core Specifications: Product type: Load cell input unit Number of channels: 1 Input range: –5.0 to 5.0 mV/V Input conversion range: –5.5 to 5.5 mV/V Load cell excitation voltage: 5 V DC ±10% Max. excitation current: 60 mA A/D converter resolution: 24 bits Conversion cycle: 125 µs Nonlinearity: ±0.01% of full scale Zero drift: ±0.1 μV/°C RTI Gain drift: ±10 ppm/°C Warm‑up time: 30 minutes Advanced Specifications: Zero point adjustment range: –5.0 to 5.0 mV/V Gain point adjustment range: –5.0 to 5.0 mV/V Isolation: Transformer + digital isolator between input and NX bus Dielectric strength: 510 V AC for 1 min (leakage current ≤ 5 mA) Insulation resistance: ≥ 20 MΩ at 100 V DC I/O refreshing methods: Free‑run, synchronous, task period prioritized Terminal block: Screwless push‑in (16 terminals, removable) NX unit power consumption: 1.70 W max. Mounting: DIN rail Protection rating: IP20 Dimensions (W × H × D): 12 mm × 100 mm × 71 mm Weight: 70 g max. Ambient operating temperature: 0 °C … 55 °C Ambient operating humidity: 10% … 95% (non‑condensing) Functions & Features: Digital filtering (low‑pass filter, moving average) for stable measurement Cable disconnection check via sensor disconnection test Digital tare subtraction (fixed tare, one‑touch tare) Zero calibration and span calibration procedures Data tracing for optimum digital filter design System Integration: This unit belongs to the Omron NX series I/O system. Compatible with 4‑wire and 6‑wire strain‑gauge load cells (refer to applicable load cells in the user’s manual). Requires an NX series communication coupler unit (EtherCAT or EtherNet/IP) or an NX series CPU unit for operation. Configurable in Sysmac Studio via I/O allocation and calibration tools. Terminal block spare part: NX‑TBC162. Related Products: NX‑ECC203 – EtherCAT Coupler Unit for NX I/O system (2 ports, 125 μs cycle time) NX‑EIC202 – EtherNet/IP Coupler Unit for NX I/O system (2 ports, 63 I/O units) NX‑PD1000 – Additional NX unit power supply (24 V DC, 10 W) NX‑PF0630 – Additional I/O power supply unit (4 A, 5‑24 V DC) NX‑TBC162 – Replacement terminal block (16‑pin, screwless push‑in)
