NT21-ST121B-E is a new touch screen digitizer assembly, designed as a direct replacement part to restore the interactive functionality of compatible industrial display units. This component combines a durable touch glass surface with an integrated digitizer, accurately translating touch inputs into precise digital signals. It is engineered to offer excellent optical clarity, scratch resistance, and reliable multi-touch or single-touch response in demanding environments such as factory floors, control rooms, and medical systems. This "new" digitizer ensures a like-original fit, performance, and durability, making it an ideal solution for maintenance technicians and system integrators looking to repair or upgrade their HMI (Human-Machine Interface) equipment with a guaranteed, high-quality part.
| Parameter | Specification |
|---|---|
| Model Number | NT21-ST121B-E NT21-ST121B-E |
| Display Type | Touchscreen + 4 physical function keys (F1–F4) |
| Operation Method | 640 × 480 pixels (VGA) |
| Touch Technology | Analog resistive (4-wire), supports stylus or finger touch |
| Communication Interface | • RS-232C (for programming/host computer) • RS-422/485 (for connecting OMRON PLCs, such as CQM1H, CS/CJ series) |
| Supported PLCs | OMRON Host Link protocol (C-series, CV, CS, CJ, CP, etc.) Programming Software | NT Support Tool or CX-Designer (older version) Power Input | DC 24V (range 19.2–28.8V) |
| Protection Rating | Front panel IP65 (dustproof and waterproof, suitable for control cabinet mounting) |
| Operating Temperature | 0°C to +50°C |
| Typical Applications | OMRON PLC control systems for local monitoring (e.g., packaging machines, injection molding machines, conveyor belts) Legacy equipment operator panels (replacing buttons + indicator lights) Water treatment, HVAC, and textile machinery Maintenance and repair of existing equipment (currently mostly in the "extended service life" stage) |
