CGA EGA to VGA Industrial Converter — CNC CRT to LCD Signal Guide
Many older CNC CRTs use IBM-compatible CGA (Color Graphics Adapter) or EGA (Enhanced Graphics Adapter) video standards. These signals are not directly compatible with modern VGA LCD displays. An industrial CGA/EGA-to-VGA converter enables you to use a modern LCD while preserving the original display characteristics.
Understanding CGA and EGA Signals
| Standard | Resolution | Colors | Connector |
|---|---|---|---|
| CGA | 640×200 / 320×200 | 16 | 15-pin D-sub or 9-pin D-sub |
| EGA | 640×350 | 16 (from 64 palette) | 9-pin D-sub (DB-9) |
| VGA | 640×480+ | 256+ | 15-pin HD-15 (VGA) |
KT809 CGA/EGA to VGA Converter
Our KT809 converter supports both CGA (15-pin) and EGA (9-pin) inputs and outputs a standard VGA signal. Key features:
- Automatic CGA/EGA signal detection — no dip switches
- Built-in scan doubling — converts 15.75kHz to 31.5kHz
- Aspect ratio correction (4:3 output)
- Industrial temperature range (-20°C to +70°C)
- Wide input voltage (DC 5V-24V)
Compatible CNC Systems
CGA and EGA signals are most commonly found on older CNC systems from:
- FANUC — Series 0 and 0i color CRT displays
- Siemens — SINUMERIK 810/820 color displays
- Heidenhain — TNC series color displays
- Mitsubishi — E60/M50 color CRT systems