Model
| ATC-804 | ATC-810 | ATC-820 | ATC-820B | ATC-830 | ATC-840 | ATC-850 |
| Description | 4-Port RS-232 USB-High Speed Serial Converter | 1-Port RS-232 USB-High Speed Serial Converter | 1-Port RS-485 USB-High Speed Serial Converter | 1-Port RS-485 USB-High Speed Serial Converter | 1-Port TTL USB-High Speed Serial Converter | 1-Port RS-422 USB-High Speed Serial Converter | 1-Port Isolation USB-High Speed Serial Converter |
| Serial Interface | RS-232 * 4 | RS-232 * 1 | RS-485 * 1 | RS-485 * 1 | TTL * 1 | RS-422 * 1 | RS-232/485/422 * 1 |
| Connector | DB9 male | DB9 male | DB9 male Terminal Block Board | RJ45 | DB9 maleTerminal Block Board | DB9 maleTerminal Block Board | DB9 male 6 Pin Terminal |
| Baud Rate | 50 bps to 460.8Kbps | 50 bps to 460.8Kbps | 50 bps to 921.6Kbps | 50 bps to 921.6Kbps | 300 bps to 921.6Kbps | 50 bps to 460.8Kbps | 50 bps to 460.8Kbps |
| Data Bits | 5, 6, 7, 8 |
| Parity | None, Even, Odd, Space, Mark |
| Flow Control | RTS/CTS, XON/XOFF | RTS/CTS, XON/XOFF | XON/XOFF | XON/XOFF | XON/XOFF | XON/XOFF | CTS/RTS, XON/XOFF |
| Serial Signals | TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND | TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND | 485+,485- | 485+,485- RJ-45:Pin1, Pin2 | TXD, RXD, GND | TX+,TX-,RX+,RX- | TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND 485+,485- TX+,TX-,RX+,RX- |
| ESD Protection | 15 KV USB.600W surge protect for signal | 15 KV USB.1000W surge protect for signal |
| Isolation Voltage | -
| 3500VRMS 500VDC sequence |
| USB Compliance | Compatible with USB2.0 and USB1.x |
| USB Connector | USB type A |
| USB Speed | 12 Mbps (Full-Speed USB) |
| Operating Systems | Windows (2000, XP x86/x64, 2003 x86/x64,Vista x86/x64, Win7/8/10/11), WinCE 6.0, Linux 2.6 x86/x64 |
| Housing | Aluminum & Iron | ABS + PC | ABS + PC | ABS + PC | ABS + PC | ABS + PC | Iron |
| Weight | 1.0Kg | 100g(no package) | 0.5Kg |
| Dimensions | 106 × 54 × 136 mm | 60 x 35 x 17mm | 60 x 35 x 17mm | 60 x 35 x 17mm | 60 x 35 x 17mm | 60 x 35 x 17mm | 100 × 86 × 26 mm |
| USB Cable Length | 1000mm | 260mm | 1000mm |
| Operating Temperature | -40 to 70°C (-40 to 158°F) |
| Storage Temperature | -40 to 85°C (-40 to 185°F) |
| Operating Humidity | 5 to 95% RH |
| Certifications | RoHS, CE, FCC |