Key facts
- Brand
- moxa
- Model
- TCC-120/120I
- Category
- Digital repeater
- Industry
- Electronics
- Documents
- 3
- Languages
- EN
- Last added
- 2026-11-09
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MOXA TCC-120/120I RS-422/485 Repeater User's Guide
The MOXA TCC-120/120I is an RS-422/485 isolated repeater designed to extend transmission distance and increase networking capability in industrial environments. It features MOXA's ADDC™ technology for automatic data direction control, eliminating the need for handshaking signals. The device offers electrical isolation (2 KV for the TCC-120I model) to protect against power surges and includes reverse power protection.
Read onlineMoxa TCC-120/120I specifications
| Communication Signals (2-wire) | Data+, Data-, SGND |
|---|---|
| Communication Signals (4-wire) | Tx+, Tx-, Rx+, Rx-, SGND |
| Baudrate | 50 bps to 921.6 Kbps |
| Isolation | 2 kV for both Power and Signal (TCC-120I) |
| Operating Temperature | -20 to 60°C |
| Storage Temperature | -20 to 85°C |
| Humidity | 5 to 95 %RH |
| Power Input Voltage | External 12-48 VDC |
| Power Consumption (TCC-120) | 65mA @ 12V, 37mA @ 24V, 26mA @ 48V |
| Power Consumption (TCC-120I) | 180mA @ 12V, 90mA @ 24V, 52mA @ 48V |
| Dimensions | 67 x 100 x 22 mm (casing only); 90 x 100 x 22 mm (including ears) |
| Housing | Aluminum |
| Terminal Block Wire Gauge | #22 to #16 AWG |
| Weight | 148 ±5 g |
| Regulatory Approvals | CE, FCC (Class A), UL-60950-1 |
| Transmission Distance Extension | up to an additional 1.2 km |
Source: Moxa TCC-120/120I RS-422/485 Isolated Repeater Hardware Installation Guide
All Moxa TCC-120/120I documents by type
Mounting, wiring and first power-up. Read it before the hardware goes in.
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is the operating temperature range of the TCC-120/120I?
The operating temperature range is -20 to 60°C.
From: Moxa TCC-120/120I RS-422/485 Isolated Repeater Hardware Installation Guide
What power supply does the TCC-120/120I use?
It is powered by an external 12-48 VDC power supply.
From: Moxa TCC-120/120I RS-422/485 Isolated Repeater Hardware Installation Guide
What is the difference between the TCC-120 and the TCC-120I?
The TCC-120I comes with 2 KV isolation protection for both power and signal; the TCC-120 does not include this isolation rating.
From: Moxa TCC-120/120I RS-422/485 Isolated Repeater User’s Guide
What power supply does the TCC-120/120I need?
It is powered by an external 12-48 VDC power supply connected to the V+ and V- terminals on the 3-contact terminal block.
From: Moxa TCC-120/120I RS-422/485 Isolated Repeater User’s Guide
What is the maximum transmission distance extension?
The repeater can boost the serial signal to extend transmission distance up to an additional 1.2 km.
Does the TCC-120/120I support automatic baud rate detection?
Yes, it incorporates a method for automatically detecting the serial signal's baud rate by hardware.