InLine® USB to serial RS485 Converter with isolator, USB-A to 4-pin terminal content_copy

Reliable and protected USB connection for RS485 devices and Modbus networksProtects connected devices: Galvanic isolation of up to 2.5 kV reduces potential differences and ground loops. In addition, surge, lightning and ESD protection guard against electrical interference and enhance operational reliability, even in demanding installations.
Simple connection between USB and RS485: The Converter connects computers with a USB-A port to RS485 devices via a virtual COM port. Ideal for Modbus RTU applications as well as control, measurement and automation systems.
Quick to set up: Automatic direction switching in half-duplex mode is handled entirely by the hardware. No additional settings via RTS/CTS signals or software are required, simplifying commissioning.
Reliable data transmission: The FTDI FT232RNL chipset supports baud rates from 300 to 512,000 b/s. The integrated 120 Ω terminating resistor reduces signal reflections and ensures stable communication over longer RS485 cables.
Widely compatible: Supports Windows XP through to Windows 11, Linux, macOS and Android. The screw terminal ensures secure wiring, and the two GND terminals can be used for ground connections or cable shielding.
The InLine USB to Serial RS485 Converter with isolator enables connection between a computer with a USB-A interface and devices or networks with an RS485 interface. Communication takes place via a virtual COM port and is suitable for numerous applications such as Modbus RTU, building automation, industrial automation and measurement and control technology.
The integrated galvanic isolation, with an isolation voltage of up to 2.5 kV, protects computers and connected devices from potential differences, ground loops and electrical interference. In addition, surge, lightning and ESD protection enhance operational reliability even in demanding environments.
Product type: USB to Serial RS485 Converter with isolator
Chipset: FTDI FT232RNL
Host connection: USB-A
Device connection: RS485 screw terminal
Pin configuration: GND, A, B, GND (ground, RS485+, RS485-, additional ground)
Baud rate: 300 to 512,000 bps
Transmission mode: half-duplex with automatic direction switching
Maximum RS485 cable length: up to approx. 1.2 km
Maximum USB cable length: up to approx. 5 m
Bus participants: up to 32 devices per bus segment (an RS485 repeater is recommended for larger networks)
Termination resistance: integrated 120 Ω termination resistor
Signal isolation: galvanic isolation
Isolation voltage: up to 2.5 kV galvanic isolation
Isolated RS485 transceiver: integrated
Lightning protection: 600 W surge and lightning protection
ESD protection: up to 15 kV
USB protection: 200 mA PTC fuse, ESD protection
RS485 protection: TVS diode, protective diodes, overvoltage protection
Status indicators: PWR, TXD, RXD (power, transmit, receive)
Supported operating systems: Windows XP / 7 / 8 / 8.1 / 10 / 11, Linux, macOS, Android
Operating temperature: -40 °C to +85 °C
Humidity: 5 % to 95 % RH, non-condensing

Logistics data
Country of origin	China
Operational conditions
Operating temperature (T-T)	-15 - 70 °C
Operating relative humidity (H-H)	5 - 95%
Packaging content
Package type	Polybag
Software
Windows operating systems supported	Windows 7, Windows 8, Windows 8.1, Windows 11, Windows 10, Windows XP
Mac operating systems supported	MacOS
Mac compatibility
Technical data
Width packaging	0.100m
Side B	USB-A male
Article width	2.20cm
Packaging volume	0.0004m³
Height packaging	0.022m
Weight	0.033kg
Side A	RS485 female with isolator
Net weight	0.014kg
Article length	7.80cm
Variant	Supports serial port
Article height	1.10cm
Length packaging	0.165m
Supported OS	Windows, Mac OS, Linux, Android
Technical details
Host interface	USB 2.0
Output interface	RS-485
Connector 1	USB Type-A
Connector 2	Terminal block
Connector gender	Male/Female
Surge protection voltage	6 kV
Electrostatic Discharge (ESD) protection	15 kV
RS-485 signals	GND
Baud rate	512 Kbit/s
Product colour	Black
Chipset	FTDI FT232RNL
Package volume	400 cm³
Weight & dimensions
Width	22 mm
Depth	78 mm
Height	11 mm
Weight	14 g
Package width	100 mm
Package depth	165 mm
Package height	22 mm
Package weight	33 g
Dimensions (WxDxH)	22 x 78 x 11 mm

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