Separated USB to RS-485 Converter with Overvoltage Protection
- Add feedback:
- Code: USB-485/So
- Manufacturer's code: 5904041752414
- Weight: 0.1 kg
-
Availability:
Produkt available
(shipping withing 24-48h)
USB to RS-485 isolated converter, based on FTDI FT232RL integrated circuit. RS-485 interface with isolation, connected to USB.
USB-485/So is a product that converts a USB port into a isolated interface, allowing for the connection of an RS-485 communication bus to a PC.
The FTDI chip used emulates a standard COM port on the computer, which is then converted inside the converter into a differential signal, compliant with the RS-485 standard. The low-impedance RS-485 drivers allow for the connection of up to 128 devices in a network - as long as they also use low-impedance drivers.
The product is equipped with galvanic isolation of the RS-485 port at a level of 1kV DC and highly effective surge protection of 600A @ 8/20μs. The effectiveness of the surge protection is increased by the use of a resettable MOSFET fuse.
The product is designed for use in industrial conditions, where there are many dangerous surges and potential differences, while also requiring high reliability.
It is dedicated for use with industrial buses and protocols, commonly used in PLC or BMS controllers. The protections and isolation not only protect the product from damage, but also protect the USB port on the computer. To ensure proper functioning of the surge protection in USB-485, it is necessary to ground the computer's casing.
USB-485/So has switchable Pull-Up / Pull-Down resistors (factory default) with a value of 560Ω for lines A and B. The resistors can be turned off by opening the housing and removing the jumpers on the PCB board.
Internal structure of the USB-485/So converter
RS-485 port connection
Network structure using USB-485
Technical specifications:
Parameter | Value |
Number of channels |
1 x USB, 1 x RS-485 |
Number of devices on RS-485 line |
Up to 128 devices - Standard |
Transmission speed | Up to 1Mbit - Depending on the operating system |
Operating mode | 2-way half-duplex |
Galvanic separation |
Optical 1kV |
ESD protection |
USB 15kV |
Surge protection |
3-stage, 500A @ 8/20μs |
USB connector |
USB-B |
RS-485 connector |
4-pole, screw, removable |
Pull-up resistors |
560Ω configurable |
Line termination resistor |
Built-in, switchable |
Transmission indication |
Optical - TX/RX, bicolour LED |
Enclosure | Freestanding |
Sealing | IP40 |
Dimensions | 67 x 32 x 27 (mm) with connector |
Operating temperature | -10°C ~ 40°C |