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.

Logical pinout · physical placement not verified

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

Logical pinout · physical placement not verified

Pin details

10 connections

USB TYPE-C Port
Connects to PC for communication and 5V power supply
Power
Official table 2 row 1
Power Indicator Light
3.3V, 5V and 12V power indicator lights
Power
Official table 2 row 2
Communication Indicator Light
4-channel RX and TX communication indicator lights for TTL1, TTL2, RS485 and RS232
UART
Official table 2 row 3
PWR OUT
Power Output
Unknown
Official table 2 row 4
TTL1, TTL2
2-channel TTL Communication Ports
GPIO
Official table 2 row 5
GND
System Ground
Ground
Official table 2 row 6
12V
Power Output
Unknown
Official table 2 row 7
RS485(A)
Fully Isolated RS485 Port
UART
Official table 2 row 8
RS232(B)
Fully Isolated RS232 Port
Unknown
Official table 2 row 9
⑩
GND2 / Isolated Ground
Ground
Official table 2 row 10

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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