Don't let the small size of this USB to RS485 converter fool you; it is one of the strongest converters we have in regards to both circuitry and physical strength.
The circuitry is built right into the housing of the USB connector; the housing is made of a very solid clear rubber/plastic blend which is molded around the PCB effectively protecting it from the environment.
Industrial Grade Specifications
What makes this converter such a strong converter is the main circuitry which consists of a FT232RL processor which ensures reliable data conversion and for extra protection and performance we have chosen to use the LT1785AI from Linear Technology which has built-in fail-safe bias resistors, 60VDC fault protection, 15KV Air Discharge protection, 4KV Contact Discharge protection and has true industrial grade operating temperature of -40°C to 85°C.
Extraordinary Features
This USB to RS485 converter has some great features rarely seen in this type of compact converter.
- A ferrite bead in front of the USB connector prevents noise from entering the converter from the computer's USB port, effectively reducing noise.
- A logic "OR-gate" combined with the FT232RL processor ensures that data is only present either in the TX channel or the RX channel, not both at the same time, so if your software does not support automatic send data control this converter will take care of the problem on a hardware level.
- The RS485 interface is a 3-screw terminal header which includes the D+, D- and GND signals. The terminal header has a male and a female connector so it is easy to connect single wires to the header and disconnect/re-connect them.
The converter is powered from the USB port so no external power supply is required. LED lights indicating when the converter has power and when it is sending or receiving data is useful when troubleshooting applications.
The drivers for this converter are of course updated frequently, WHQL compliant and works with all versions of Windows, Linux and Mac.
So if you need a strong compact converter then this one will take care of some the most demanding applications and environments. Its built to last.
Overall features
- Compact strong USB - RS485 converter
- Industrial grade specifications
- Extraordinary features
- USB port-powered
- Indication LED lights for TX, RX and Power
- Interface: Terminal header + stripped wires
- Automatic Send Control by hardware
- Up to 32 nodes in network configuration
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Resources
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| SPECIFICATIONS |
| Part number |
US485COM |
| Operating system |
- Windows 10 (32/64-bit), Windows 8.1 32/64, Windows 8 32/64, Windows 7 32/64, Vista 32/64, XP 32/64, Server 2003/8R2 32/64, 2000, ME, 98Se (WHQL compliant)
- Linux
- Mac OS 8, OS 9, OS X
- Windows CE.NET (Version 4.2 and greater)
- Android
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| Processor |
FTDI FT232RL |
| Unique chipID no. |
Yes, each converter has it own unique ID number which can be accessed by the user with the D2XX driver programmers guide. |
| RS485 Interface |
Included screw terminal header / single wires |
| Echo signal |
None |
| Fail-safe bias resistors |
Yes |
| USB interface |
Standard Type A Male |
| Ports |
1-port available for RS485 |
| Signals |
RS485, 2-wire half duplex: D+, D-, GND |
| Baud rate |
300-921.600bps (up to 3kbps by using alising) |
| Parity |
None, Odd, Even, Mark, Space |
| Data Bits |
7, 8 |
| Stop Bits |
1, 2 |
| TX / RX buffer size |
256 Byte Transmit Buffer / 128 Byte Receive Buffer |
| Adjustable USB transfer sizes for TX and RX |
From 64 bytes to 4096 bytes |
| Adjustable latency timer |
1 to 255 msec |
| Adjustable read and write timeouts |
0 to 10000 msec |
| Flow Control |
None, Xon/Xoff, Hardware |
| COM port accessible by |
Included virtual COM port drivers or FTD2XX.DLL |
| Special features |
- Compatible with Modbus RTU/ASCII, BACnet
- Supports non-standard baud rates
- Automatic Send Control
|
| Electrical protection |
60VDC fault protection, 15KV Air Discharge protection, 4KV Contact Discharge protection |
| Current draw |
Static: less than 80mA. Dynamic average: less than 150mA |
| Interface compliance |
USB1.1,2.0,3.0, EIA/TIA RS-232 |
| Regulatory compliance |
FCC, CE and RoHS |
| Working temp |
-40°C to 85°C |
| Cable length |
5 feet |
| Size |
50 x 8 x 18mm (USB part only) |
| Warranty |
1 year limited warranty |
For alternative USB to serial RS485 and RS422 solutions please see our full selection of USB to Serial RS485 converters
