Omron GRT1-TS2P SmartSlice 2-Channel Thermocouple Input Unit
Product Overview
The Omron GRT1-TS2P is a temperature input unit from the SmartSlice I/O family. It provides two isolated channels for direct connection of thermocouples (types B, E, J, K, R, S, T, N) to a DeviceNet network. The SmartSlice system is a modular, space-saving I/O solution that mounts on DIN rail and communicates via DeviceNet to a PLC or controller. The GRT1-TS2P is ideal for distributed temperature monitoring in industrial furnaces, ovens, injection molding machines, and packaging equipment.
Key Specifications
Model: GRT1-TS2P
Type: Thermocouple input unit (2 channels)
Supported Thermocouple Types: B, E, J, K, R, S, T, N (selectable per channel)
Temperature Range: -200°C to 2300°C (depending on type)
Resolution: 0.1°C
Conversion Accuracy: ±0.3% of full scale (±1°C typical)
Cold Junction Compensation: Internal or external
Digital Filter: Programmable (1 to 15 steps)
Input Impedance: 1 MΩ minimum
Update Time: 250 ms for both channels
Diagnostics: Wire break detection, LED status
Power Supply: 24 VDC from SmartSlice bus
Dimensions: 71 × 100 × 63 mm (W×H×D)
SmartSlice Modular I/O System
The GRT1-TS2P snaps onto a SmartSlice base unit (GRT1-END), which communicates with a DeviceNet master (e.g., Omron CJ1W-DRM21). Up to 64 I/O slices can be connected per base, reducing wiring and panel space. The thermocouple unit automatically appears as a DeviceNet slave with two 16-bit input words (temperature data) and configuration registers in the output area.
Configuration and Setup
Parameter settings (thermocouple type, filter, scaling) are stored in the non-volatile memory of the GRT1-TS2P and can be configured via DeviceNet explicit messages or using Omron’s Configurator software. The unit supports both linear (default) and user-defined scaling, allowing engineers to read temperature directly in engineering units without PLC conversion.
Diagnostics and Error Handling
Each channel includes wire break detection: if the thermocouple is open or disconnected, a specific error code is sent to the PLC. A red LED on the front panel indicates a fault. The unit also monitors internal temperature for cold junction compensation; a failure of the compensation circuit triggers an alarm.
Applications
Plastic injection molding (barrel and mold temperatures)
Industrial ovens and dryers
Packaging film sealing bars
Foundry and heat treatment furnaces
Pharmaceutical stability chambers
Wiring and Termination
The GRT1-TS2P uses screwless push-in terminals for thermocouple wires. Shields can be connected to a dedicated grounding terminal. The unit includes removable terminal blocks for easy replacement. Thermocouple extension wires must be of the same type as the sensor to avoid measurement errors.
Conclusion
The Omron GRT1-TS2P SmartSlice thermocouple input unit delivers compact, distributed temperature measurement with high accuracy and direct integration into DeviceNet networks. It is a reliable choice for demanding industrial thermal monitoring applications.
