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Small aluminium box with USB-B and IDC connectors, dull-polished finish

WaveShare

WaveShare Industrial USB to 4-CH TTL Converter Adapter

SKU CH-F7E4-2JMD8

Converts USB to four independent TTL UART channels with hardware flow control and selectable 3.3V or 5V levels

  • CPU TypeOther
  • Converts one USB port to four independent TTL channels with hardware flow control
  • Selectable 3.3 V or 5 V logic levels per channel for flexible device compatibility
  • Resettable fuse and protection diodes guard against over-current and over-voltage events
  • Industrial aluminium alloy enclosure with CNC openings and reversed mounting holes for secure wall mounting
  • Compatible with Windows 7, 8, 8.1, 10, 11, Linux and Android systems

Industrial USB to 4-CH TTL Adapter

The WaveShare Industrial USB to 4-CH TTL Converter Adapter extends a single USB connection into four independent UART channels with hardware flow control. Each channel operates concurrently for multi-device serial communication. An onboard voltage selector switches between 3.3V and 5V TTL logic levels. The aluminium alloy enclosure provides durability for industrial or office environments.

Check USB Port and OS Compatibility

Verify your host has an available USB-B port for the adapter connection. Confirm the target operating system is among those listed: Windows 7, 8, 8.1, 10, 11, Linux, or Android. Ensure your application can address four separate virtual COM ports. The IDC connector uses a fool-proof design; match the pinout to your peripheral cables before ordering.

Replaces Single-Channel USB-UART Bridges

This adapter replaces single-channel USB-to-serial converters when simultaneous communication with multiple TTL devices is required. The jump is worth it for projects needing four independent data streams with hardware flow control and selectable logic levels. Integrated resettable fuse, protection diode, and ESD suppression improve reliability over unprotected modules. Not for buyers who need only one serial channel or require a different USB connector type.

Highlights

  • Converts one USB port to four independent TTL channels with hardware flow control
  • Selectable 3.3 V or 5 V logic levels per channel for flexible device compatibility
  • Resettable fuse and protection diodes guard against over-current and over-voltage events
  • Industrial aluminium alloy enclosure with CNC openings and reversed mounting holes for secure wall mounting
  • Compatible with Windows 7, 8, 8.1, 10, 11, Linux and Android systems

Specifications

CPU TypeOther

Questions about this item

What comes in the box and do I need to buy cables or drivers separately?

The adapter ships in an aluminium alloy enclosure with a USB-B connector and an IDC connector. No extra cables or driver discs are mentioned; Windows 7, 8, 8.1, 10, 11, Linux and Android support is built into the OS.

There is only one model listed — how do I choose the right voltage level for my devices?

A 3.3V and 5V voltage level switch on the board lets you select the TTL level per channel, so the same unit works with both logic families.

What does the four-channel UART with hardware flow control mean for real-world use?

Each of the four channels can transmit and receive independently at the same time, and hardware flow control prevents data loss during high-speed bursts.

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