Omron NX-TS2202 NX Series Temperature Input Unit

Description

Processing temperature signals within the Omron Sysmac platform is handled directly by the Omron NX-TS2202, a high-resolution resistance thermometer input module. Designed for precise thermal processing operations, this module supports two Pt100 three-wire RTD input channels with a fast conversion time of 10 ms per unit and a maximum resolution of 0.01 degC. The device features a space-saving 12 mm width and utilizes a 16-point screwless clamping terminal block, which significantly minimizes field installation time and eliminates terminal tightening maintenance. Highly robust, it offers comprehensive internal isolation using transformers for power and digital isolators for signals between the inputs and the NX backplane bus.

Features

• Two independent input channels specialized for Pt100 three-wire resistance thermometers.
• Rapid 10 ms conversion rate per unit to capture high-speed thermal fluctuations.
• Ultra-precise temperature tracking with a resolution of 0.01 degC max.
• Free-Run I/O refreshing mechanism ensuring low latency data delivery to the host controller.
• Complete channel-to-channel and channel-to-bus electrical isolation via digital isolators and transformers.
• Built-in TS status indicator for instant visual diagnosis of module health.
• Push-in screwless clamp terminal block with 16 connection points for vibration-resistant wiring.

Applications

• Precision multi-zone heating and cooling control in plastic extrusion machinery.
• Real-time temperature logging and regulation in chemical batch reactors.
• Thermal profiling and environmental monitoring inside cleanrooms and semiconductor processing chambers.
• Sterilization, pasteurization, and packaging temperature loops in high-speed food processing plants.

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

The NX-TS2202 is optimized for Sysmac architectures and mounts on standard NX bus bases. While physically identical to thermocouple input modules like the NX-TS2101, the internal analog-to-digital front end of this module is dedicated strictly to resistive measurement. It requires standard Pt100 RTD curves; attempting to connect nickel (Ni) or other non-Pt standard RTDs will result in hardware-level range overflow faults in Sysmac Studio.

Application Pitfalls & Engineering Notes

To prevent measurement drift, ensure that the lead resistances of all three wires of the Pt100 sensor are perfectly matched. A resistance mismatch between the lines directly compromises the three-wire compensation algorithm, leading to systematic temperature calculation errors. The module accommodates up to 20 Ohms of conductor resistance, but asymmetric line impedances must be strictly avoided during cabling.

Commissioning & Wiring Tips

Avoid using tinned wire leads with the push-in terminal blocks. Tinning can cause the wire to cold-flow over time, which loosens the physical spring connection. Instead, use high-quality insulated crimped ferrules or bare stranded conductors. Keep the sensor shielding terminated directly to a functional ground point close to the module base to shield the sensitive analog front-end from high-frequency industrial electromagnetic interference.

Installation Guidelines