Interface modules
Interface modules join what does not fit together: a microcontroller to a USB port, an RS-232 line to a UART, a PC to an RS-485 bus. They are ready-built assemblies; on the USB side the driver of the respective converter chip is required.
All in the shop
Which module?
| Module | Connects | Distinctive feature | Part number |
|---|---|---|---|
 USB-A UART Bridge CP2104 | USB-A ↔ UART | Supplies the microcontroller with up to 100 mA from USB, GPIOs 0–3 usable | 901.077 |
 USB-A UART Bridge CP2102 | USB-A ↔ UART | The slim classic, plugs straight into the socket | 901.023 |
 USB-B UART Bridge CP2102 | USB-B ↔ UART | A fixed socket instead of a plug — for building into a device | 901.190 |
 USB UART Bridge ISO | USB-B ↔ UART | Galvanically isolated — where ground loops or potential differences threaten | |
 USB-RS485-Bridge | USB ↔ RS-485 | For the fieldbus; also available in an enclosure | 901.274 |
 USB-B-RS232 Bridge | USB-B ↔ RS-232 | Replaces the serial port the computer no longer has | |
 RS232(DTE)-UART-Bridge | RS-232 ↔ UART | Level shifter, DTE wiring — the device presents itself as terminal equipment | 901.191 |
 RS232(DCE)-UART-Bridge | RS-232 ↔ UART | Level shifter, DCE wiring — its counterpart | 901.193 |
DTE or DCE? The two RS-232 bridges differ in how the send and receive lines are assigned. A null-modem cable swaps those lines and lets one variant serve in place of the other.
Radio link instead of cable: the ICT RS485 Radio Bridge carries the same serial data over 868 MHz and thereby replaces the cable between two nodes.
The modules in detail
USB-A UART Bridge CP2104
USB-A UART Bridge CP2104
The USB-UART-Bridge connects UART components with a USB-Host. The Bridge generates a 3.45V Voltage from USB. This can be used to supply the microcontroller over a jumper (maximum 100mA@3.45V).
Features:
- Baud rate: 300Bit/sec up to 2MBit/sec
- GPIOs 0-3 are set to push/pull at delivery state! (so LEDs, TxEN and GPIO are working)
- Voltage-regulator: up to 100mA@3.45V
- LEDs: Power, RX and TX
- IO: RX ( to connect with RX on the µC),TX (to connect with TX on the µC), GND, VCC
- Size: (LxWxH)(mm): 52.0 x 17.0 x 5.2
Downloads:
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Driver: CP210x Driver
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Datasheet: Datasheet USB-A UART Bridge CP2104
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Schematic: Schematic USB-A UART Bridge CP2104
The USB-A UART Bridge CP2104 can be ordered at our Shop
USB-A UART Bridge CP2102
USB-A UART Bridge CP2102
The USB-UART-Bridge connects UART components with a USB-Host. The Bridge generates a 3.3V Voltage from USB. This can be used to supply the microcontroller over a jumper (maximum 100mA@3.3V).
Features:
- Baud rate: 300Bit/sec up to 1MBit/sec
- Voltage-regulator: up to 100mA@3.3V
- LEDs: Power, RX and TX
- IO: RX ( to connect with RX on the µC),TX (to connect with TX on the µC), GND, VCC
- Size: (LxWxH)(mm): 45.0 x 15.0 x 5.2
Downloads:
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Driver: CP210x Driver
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Datasheet: Datasheet USB-A UART Bridge CP2102
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Schematic: Schematic USB-A UART Bridge CP2102
The USB-A UART Bridge CP2102 can be ordered at our Shop
USB-B UART Bridge CP2102
USB-B UART Bridge CP2102
The USB-UART-Bridge connects UART components with a USB-Host. The Bridge generates a 3.3V Voltage from USB ( maximum 100mA@3.3V).
Features:
- Baud rate: 300Bit/sec up to 1MBit/sec
- Voltage-regulator: up to 100mA@3.3V
- LEDs: RX and TX
- IO: RX ( to connect with RX on the µC), TX (to connect with TX on the µC)
- all Handshake signals are available on pin headers
Downloads:
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Driver: CP210x Driver
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Datasheet: Datasheet USB-B UART Bridge CP2102
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Schematic: Schematic USB-B UART Bridge CP2102
The USB-B UART Bridge CP2102 can be ordered at our Shop
USB UART Bridge ISO
USB-A UART Bridge CP2104
The USB UART Bridge ISO connects UART components electrically isolated with a USB-Host.
Features:
- USB-B for PC plugging
- Baud rate: up to 3MBit/sec
- LEDs: RX and TX
- IO: RX (to connect with RX on the µC),TX (to connect with TX on the µC), GND and +5V on power supply of the µC
- Usable with and without flow control
Downloads:
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Driver: VCP Drivers
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Datasheet: Datasheet USB UART Bridge ISO
The USB UART Bridge ISO can be ordered at our Shop
USB-RS485-Bridge
USB-RS485-Bridge
The USB-RS485-Bridge connects RS485/422 components with a USB-Host. The Bridge generates its supply voltage from USB. A suitable enclosure is also available.
Features:
- Baud rate: up to 3MBit/sec
- LEDs: Power=orange, RX=red and TX=green
- IOs: RS485-A, RS485-B,GND
Downloads:
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Driver: VCP Drivers
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Datasheet: Datasheet USB RS485 Bridge
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Schematic: Schematic USB RS485 Bridge
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EU Conformity: EU Conformity USB RS485 Bridge
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Datasheet enclosure: Datasheet enclosure
The USB RS485 Bridge can be ordered at our Shop
USB-B-RS232 Bridge
USB-B-RS232 Bridge
The USB-B-RS232 Bridge connects RS232 components with a USB-Host.
Features:
- Baud rate: up to 250kBit/sec
- LEDs: Link, RX and TX
- RS232 male connector
- USB-B connector
Downloads:
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Driver: CP210x Driver
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Datasheet: Datasheet USB-B-RS232 Bridge
The USB-B-RS232 Bridge can be ordered at our Shop
RS232(DTE)-UART-Bridge
RS232(DTE)-UART-Bridge
The RS232(DTE)-UART-Bridge shifts UART levels to RS232. The Bridge is powered with voltages of 3.3V to 5V.
Features:
- Baud rate up to 256kBit/sec
- Power supply 3.3V to 5V
- LEDs: RX, TX and for valid Data
- IO: RX, TX, GND, VCC
- all Handshake signals are available on pin headers
Downloads:
- Datasheet: Datasheet RS232(DTE)-UART-Bridge (german)
The USB-B-RS232 Bridge can be ordered at our Shop
RS232(DCE)-UART-Bridge
RS232(DCE)-UART-Bridge
The RS232(DCE)-UART-Bridge shifts UART levels to RS232. The Bridge is powered with voltages of 3.3V to 5V.
Features:
- Baud rate up to 256kBit/sec
- Power supply 3.3V to 5V
- LEDs: RX, TX and for valid Data
- IO: RX, TX, GND, VCC
- all Handshake signals are available on pin headers
Downloads:
- Datasheet: Datasheet RS232(DCE)-UART-Bridge
The USB-B-RS232 Bridge can be ordered at our Shop