KEL-7S — 7" Entry All-in-one PC
The smallest KEL: a 7 inch 1024×600 touch screen, the computer and the RS232/485/TTL ports in one fanless unit that fits a door frame, a locker face or the side of a machine. Like the KEL-XS it can carry an access-control relay on the board, so the panel switches the lock itself. Designed and built in Thailand.
- CPU: Quad-core Cortex-A53
- Display: 7" 1024×600
- I/O: RS232/485/TTL · 10/100M Ethernet
- Access-control relay on board (option)
- Fanless — no moving parts
Minimum order 10 units · Request a quoteRAM 1GB · Flash 32GB as standard; 2GB+64GB and 4GB+128GB are also built. RAM and flash can be scaled to your spec — volume pricing on request.
What are the KEL-7S specifications?
| Type | 7" all-in-one PC (HMI) |
|---|---|
| CPU | Quad-core Cortex-A53 |
| NPU | — |
| Display | 7 inch, 1024×600 |
| Brightness | 500 cd/m² (optional 1000 cd/m² — higher unit price) |
| HDMI | — |
| Serial I/O | RS232 / RS485 / TTL |
| Ethernet | 10/100M |
| Access-control relay | Optional (on COM6) |
| Cooling | Fanless (no moving parts) |
| Suitable for | Access control, smart lockers, compact machine panels |
| Warranty | 1 year |
| Minimum order | 10 units · Request a quote |
| Lead time | 30–45 days from order, depending on quantity |
Full hardware specification
| CPU | Quad-core Cortex-A53 @1.8GHz |
|---|---|
| RAM+ROM | 1GB+32GB (standard), 2GB+64GB, 4GB+128GB |
| Android OS | Android 10 |
| Linux OS | Ubuntu 18.04 / Linux QT |
| HDMI | Not Support |
| Resolution | 1024×600 |
| Brightness | 500 cd/m² (Optional: 1000 cd/m² high-brightness panel) |
| View Angle | Full view |
| LCD Type | IPS |
| Touch | 5-point capacitive touch |
| WiFi/BT | WiFi6 single-band (dual-band optional), BT 5.2 |
| 4G/5G | Optional, micro-SIM socket on board |
| GPS | Comes with the 4G module (optional) |
| USB | 4*USB 2.0, 1*USB OTG |
| TF Card | Self-ejecting TF card socket, support up to 256GB |
| Serial Port | 2-way TTL, 2-way RS232, 2-way RS485 |
| GPIO | 4-way GPIO signal |
| CAN | Not Support |
| Ethernet | 10/100M Adaptive Ethernet |
| Access Control | Optional — COM6 can be built as a single-pole double-throw relay |
| Audio | 1-way 4-band headset integrated 3.5mm socket, 1-way 8 ohm 6W dual-channel audio amplifier output (no built-in speaker) |
| Buttons | Reset button, back button, volume + button, volume - button, burn button |
| LED | Power indicator, operation indicator, WiFi indicator, 4G/5G network indicator |
| Power | DC-12V±5% / DC-24V±5% power supply. Standby Power: 0.47w |
| Size | Opening size: 184.1*115.9mm, overall size: 195.5*127.5*28.5mm, outer packaging size: 233*160*52mm |
| Weight | Bare weight: 0.70kg, including packaging weight: 0.82kg |
| Rated Power | 4.5W |
| Working Voltage | 12~24V, typical value 12V |
| Temperature | Working Temperature: -10°C~60°C Storage Temperature: -20°C~70°C |
| Working Humidity | 0% ~ 95% (No condensation) |
What is the KEL-7S used for?
Access Control
A door post small enough for a frame, reading the card and throwing the lock relay itself
Access Control solutions →Smart Locker
One compact panel per locker bank — authentication and door control in the same unit
Smart Locker solutions →Machine Panel
A 7 inch operator panel on a machine, talking to the PLC over RS485
Machine Control solutions →Frequently Asked Questions
Why choose 7 inch over 10.1 inch?
Space and cost. The 7 inch cut-out is 184.1 × 115.9 mm against 253.7 × 167.7 mm for the 10.1 inch, and the unit weighs 0.70 kg against 1.07 kg — so it fits a door frame, a narrow locker face or a machine side panel where the bigger screen will not go. The ports and the software are the same.
Which KEL models can switch a lock by themselves?
KEL-7S and KEL-XS. On both, COM6 can be built as a single-pole double-throw relay, so the panel switches a lock or a strike directly instead of driving a separate controller. Every other KEL reaches a controller over RS232 or RS485 instead.
What is the difference between the KEL-7S and the KEL-7L?
Same 7 inch body, same cut-out, same serial ports. The KEL-7S is the entry model: a Quad-core Cortex-A53, 10/100M Ethernet, no HDMI, and the optional relay. The KEL-7L adds a Cortex-A72 + Cortex-A53 CPU, a 6 TOPS NPU, 4K HDMI and gigabit Ethernet — but no relay.
