The Moxa TCC-80I is a compact, port-powered RS-232 to RS-422/485 converter with 2.5 kV optical isolation, SW4 port power test mode, automatic baudrate detection, and ADDC. Optional 5–12 VDC external supply. 300 bps to 115.2 kbps, 0 to 60°C.
The Moxa TCC-80I is a compact, port-powered RS-232 to RS-422/485 media converter with 2.5 kV optical isolation. It draws power directly from the host PC’s RS-232 TxD, RTS, and DTR lines, and protects both the host and RS-422/485 devices from ground loop currents and transients. The photo coupler isolation transforms the electrical signal into light and back, completely isolating the two electrical circuits. A built-in SW4 test switch lets you verify whether the RS-232 port provides sufficient power before committing to a port-powered installation.
The TCC-80I draws approximately 50 mW from the RS-232 port. Standard PC COM ports provide 70–90 mW when TxD, RTS, and DTR are connected, making the unit self-powered in most PC-connected applications. RS-232 cable length should be kept under 15 m at 9600 bps to minimise power loss. The RS-232 port is a DB9 female socket. DTR, DSR, DCD, CTS, and RTS pins are internally shorted. Baudrate range is 300 bps to 115.2 kbps with automatic detection.
Primary power is drawn from the RS-232 port. Optional external power: 5 to 12 VDC via power input jack, drawing 20 mA. Operating temperature is 0 to 60°C. Storage temperature is -20 to 75°C. Ambient humidity tolerance is 5 to 95% non-condensing. Plastic top cover with metal base plate; weighs 50 g.
UL 60950-1, EN 55032/35, CISPR 32, FCC Part 15B Class A, CE. MTBF: 2,781,161 hours (Telcordia/GB).
| Category | Specification | Value |
|---|---|---|
| Serial Interface | No. of Ports | 2 (1 x RS-232 DB9F, 1 x RS-422/485 terminal block) |
| Serial Interface | RS-232 Connector | DB9 female |
| Serial Interface | RS-422/485 Connector | Terminal block |
| Serial Interface | Standards | RS-232, RS-422, RS-485 |
| Serial Interface | Baudrate | 300 bps to 115.2 kbps (auto-detect) |
| Serial Interface | RS-485 ADDC | Yes (Automatic Data Direction Control) |
| Serial Interface | RS-485 Terminator | N/A, 120 Ω, 120 kΩ (built-in) |
| Serial Interface | Isolation | 2.5 kV (optical photo coupler) |
| Serial Signals | RS-232 | TxD, RxD, GND (DTR/DSR/DCD/CTS/RTS internally shorted) |
| Serial Signals | RS-422 | Tx+, Tx-, Rx+, Rx-, GND |
| Serial Signals | RS-485-4w | Tx+, Tx-, Rx+, Rx-, GND |
| Serial Signals | RS-485-2w | Data+, Data-, GND |
| Power | Primary Source | Port-powered from RS-232 TxD, RTS, DTR |
| Power | External Input Voltage | 5 to 12 VDC (optional) |
| Power | External Input Current | 20 mA @ 5 to 12 VDC |
| Power | No. of Power Inputs | 1 (power input jack) |
| Power | Overload Protection | Yes |
| Physical | Housing | Plastic top / metal base, IP30 |
| Physical | Dimensions | 42 x 80 x 22 mm |
| Physical | Weight | 50 g |
| Physical | Installation | Desktop |
| Environmental | Operating Temperature | 0 to 60°C (32 to 140°F) |
| Environmental | Storage Temperature | -20 to 75°C |
| Environmental | Ambient Relative Humidity | 5 to 95% (non-condensing) |
| Certifications | Safety | UL 60950-1 |
| Certifications | EMC | EN 55032/35, CISPR 32, FCC Part 15B Class A |
| MTBF | Time | 2,781,161 hrs (Telcordia/GB) |
| Warranty | Period | 5 years |
Same day dispatch on all stocked items.
