| Model Name | PT121-TST | |
| Sub-Models | 4 | |
| Display | Size | 12″ |
| Max. Resolution | 800*600 | |
| Type | TFT LCD with LED Backlight | |
| Max. Colors | 16-bit | |
| Backlight Life (hr) | 50,000 | |
| Display Contrast | 700:1 | |
| Luminance (cd/m2) | 450 | |
| Touch Panel | 4-Wire Analog Resistive Type | |
| CPU | RISC ARM9 32Bit | |
| Backup SRAM | 128KB (optional: 1MB) | |
| Working Memory | 64MB | |
| Built-in Storage Memory | 8MB+128MB (NAND Flash) | |
| Real-Time Clock (RTC) | YES | |
| Communication Interface | Micro SD Slot | YES |
| USB Client | YES (USB 2.0) | |
| USB Host | YES (USB 1.1) | |
| Serial (Com1) | RS232/422/485 | |
| Serial (Com2) | A-RS422/485 B-RS232/485 C-RS232 with RTS&CTS | |
| Serial (Com3) | RS232 (optional: RS485) | |
| Serial (Com4) | N/A | |
| Ethernet | YES | |
| Front Function Keys | N/A | |
| Audio out (optional) | N/A | |
| Video in (optional) | N/A | |
| Front USB Host Port | N/A | |
| Power | Input | 24VDC±10% Isolated |
| Consumption | 20W | |
| Environment | Operating Temperature | -10°C~60°C |
| Relative Humidity | 10%~90% | |
| Shock (operation) | 10 ~ 55Hz (X,Y,Z direction, 1G, 30 minutes shock test) | |
| EMI | FCC Part 15 Class A | |
| CE | EN61000-6-2, EN61000-6-4 | |
| UL Certification | N/A | |
| Ingress Protection | IP66 | |
| Cooling | Nature Cooling | |
| Dimension WxHxD (mm) | 335.4 x 245.9 x 54.2 | |
| Cutout Dimension WxH (mm) | 302 x 228 | |
| Net Weight (kg) | 2 | |
