RainbowLink V2: 4-Ch Isolated USB to Serial Converter with 12V PSU (TEL0190)
USB protocol converter with four isolated channels (1× RS485, 1× RS232, 2× TTL) and a built-in power supply providing 12 V/800 mA, 5 V/2 A, and 3.3 V/200 mA outputs. Isolation protects the host from ground loops in industrial environments.
Pinout
- USB TYPE-C PortOfficial table 2 row 1
Connects to PC for communication and 5V power supply
Type · Power - Power Indicator LightOfficial table 2 row 2
3.3V, 5V and 12V power indicator lights
Type · Power - Communication Indicator LightOfficial table 2 row 3
4-channel RX and TX communication indicator lights for TTL1, TTL2, RS485 and RS232
Type · UART - PWR OUTOfficial table 2 row 4
Power Output
Type · Unknown - TTL1, TTL2Official table 2 row 5
2-channel TTL Communication Ports
Type · GPIO - GNDOfficial table 2 row 6
System Ground
Type · Ground - 12VOfficial table 2 row 7
Power Output
Type · Unknown - RS485(A)Official table 2 row 8
Fully Isolated RS485 Port
Type · UART - RS232(B)Official table 2 row 9
Fully Isolated RS232 Port
Type · Unknown - ⑩Official table 2 row 10
GND2 / Isolated Ground
Type · Ground
| Pin | Position | Type | Function |
|---|---|---|---|
| USB TYPE-C Port | Official table 2 row 1 | Power | Connects to PC for communication and 5V power supply |
| Power Indicator Light | Official table 2 row 2 | Power | 3.3V, 5V and 12V power indicator lights |
| Communication Indicator Light | Official table 2 row 3 | UART | 4-channel RX and TX communication indicator lights for TTL1, TTL2, RS485 and RS232 |
| PWR OUT | Official table 2 row 4 | Unknown | Power Output |
| TTL1, TTL2 | Official table 2 row 5 | GPIO | 2-channel TTL Communication Ports |
| GND | Official table 2 row 6 | Ground | System Ground |
| 12V | Official table 2 row 7 | Unknown | Power Output |
| RS485(A) | Official table 2 row 8 | UART | Fully Isolated RS485 Port |
| RS232(B) | Official table 2 row 9 | Unknown | Fully Isolated RS232 Port |
| ⑩ | Official table 2 row 10 | Ground | GND2 / Isolated Ground |
Pin details
10 connections- USB TYPE-C PortOfficial table 2 row 1
Connects to PC for communication and 5V power supply
Power - Power Indicator LightOfficial table 2 row 2
3.3V, 5V and 12V power indicator lights
Power - Communication Indicator LightOfficial table 2 row 3
4-channel RX and TX communication indicator lights for TTL1, TTL2, RS485 and RS232
UART - PWR OUTOfficial table 2 row 4
Power Output
Unknown - TTL1, TTL2Official table 2 row 5
2-channel TTL Communication Ports
GPIO - GNDOfficial table 2 row 6
System Ground
Ground - 12VOfficial table 2 row 7
Power Output
Unknown - RS485(A)Official table 2 row 8
Fully Isolated RS485 Port
UART - RS232(B)Official table 2 row 9
Fully Isolated RS232 Port
Unknown - ⑩Official table 2 row 10
GND2 / Isolated Ground
Ground
Start wiring
Ethernet · UART · SPI · Shield
Confirm the data interface matches your host board.
Module pins: USB TYPE-C Port, Power Indicator Light, GND, ⑩, Communication Indicator Light, RS485(A). Schematik maps them to your board in the app.
Wired comms
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