- General Info
- Specifications
- Pinouts
- Images
- Troubleshooting
- Applications
DESCRIPTION
The USB-4485 is an industrial grade bi-directional USB-powered or externally powered USB to 4 Port RS485/RS422 converter, housed in heavy-duty steel case, which makes four half-duplex RS485 or four full-duplex RS422 ports available to a PC via one USB port. The USB-4485 has four DB9 male connectors on the RS485/RS422 serial ports, and a USB type B female on the USB port. This converter is ideal for implementing point-to-point, multi-drop, star networks. The adapter is powered from the USB port or an included external 100VAC-240VAC to 5VDC power supply. USB cable, four terminal blocks, power supply and drivers are included in the package. This converter operates from 300 to 230.4K baud.
The USB-4485 uses the latest FTDI chipset and is fully compatible with (32 /64 bits) versions of Windows 11, 10, 8.1, 8, 7, Vista, XP, and 98: Windows Server 2022, 2019, 2016, 2012 R2, 2012, 2008 R2, 2008, 2003 R2, 2003 Mac 10.3 â€" 10.15, and Linux.
FEATURES
- Plug-and-Play (Hot-pluggable)
- Adds Four RS-485/RS422 Ports Using One USB Port
- USB 1.1 and 2.0 Compatible
- Port Powered - No External Power Needed
- Supports 300 baud to 230,400 baud
- 3 Feet (1m) Cable for Convenience
- Transmit/Receive LED Indicators
- Data Direction Auto-turnaround - No Flow Control Necessary
- Internal 128/385 Byte TX/RX Buffers
- No IRQs, IO, DMA Required. No IRQ Conflicts
- Supports Remote Wakeup and Power Management
- Easy to Install Included Drivers
- Built-in 600W Surge and 15KV Static Protection
- MTBF(Mean Time Before Failure): 885,034 Hours
- 5 Year Manufacturer's Warranty
- RoHS 3, CE, FCC and REACH Certified
PRODUCT COMPLIANCES
IN STOCK
30 Day Money Back Guarantee!
5 Year Replacement Warranty!
DATASHEETS
2D CAD DRAWINGS AND 3D MODELS
ISO 9001:2015 QUALITY MANAGEMENT
Our internationally recognized ISO 9001:2015 Quality Management System (Cert. No. 743003912) with a scope of “Design, Sales, Distribution of Data Communication and IT Support Services“ was recognized and certified by TÜV Rheinland of North America known for its very demanding and stringent requirements. For more details see our Quality Policy.
| COMMUNICATION | |
| STANDARDS: | USB 2.0 and 1.1 Standards - RS-485 and RS-422 Standards |
| OPERATING SYSTEM: | Windows 8.1 (32/64), Windows 8 (32/64), Windows 7 (32/64), Vista (32/64), Server 2012, Server 2008 R2, Server 2008, Server 2003, XP (32/64), 2000, 98Se, CE, Mac 8/9/X, Linux and Android |
| BAUD RATES: | From 300 Baud To 230,400 baud |
| CONNECTOR TYPES: | USB-Side: Type B Female and RS-485/RS-422 Side: DB9 Male or Dual Function 5 Position Terminal Block |
| DISTANCE: | USB Side: 10 ft (3m) and RS-485/RS-422 Side: 4000 ft (1.2km) |
| LED INDICATIONS: | TX1, RX1, TX2, RX2, TX3, TX4, and RX4 |
| DRIVERS: | FTDI drivers are included in package |
| ELECTRICAL | |
| POWER SOURCE: | Port Powered From USB Port or 5VDC/1A (Input: 100-240VAC 50/60Hz, USB Type A Plug) |
| CURRENT CONSUMPTION: | Less Than 300 mA |
| STATIC PROTECTION: | 15KV Electric Static Discharge (ESD) Protection |
| SURGE PROTECTION: | 600W Surge Protection |
| MECHANICAL | |
| HOUSING: | Heavy Duty Steel Case |
| WEIGHT: | 16.1oz (456.5 grams) |
| DIMENSIONS: | 6.30 X 3.94 X 1.36 in (160.0 X 100.0 X 34.4 mm) |
| ENVIRONMENTAL | |
| OPERATING TEMP.: | -40ºF to 185ºF (-40ºC to 85ºC) |
| STORAGE TEMP.: | -40ºF to 185ºF (-40ºC to 85ºC) |
| OPERATING HUMIDITY: | 5% To 95% - No Condensation |
| QUALITY | |
| PRODUCT SAFETY: | CE, FCC and RoHS Conformance Certified |
| QUALITY MANAGEMENT: | Manufactured and Distributed to ISO 9001:2015 QMS |
| MEAN TIME BEFORE FAILURE: | 885,034 Hours |
| RELIABILITY: | Low Failure Rate - 99+% Reliability Since Inception |
| WARRANTY: | 5 Year Replacement Warranty |
RS485 / RS422 SIDE DB9 MALE OR INCLUDED 5-WAY TERMINAL BLOCK
COM 1
| RS485 | D- | D+ | GND | ||
| RS422 | T- | T+ | R+ | R- | GND |
| PIN# | 1 | 2 | 3 | 4 | 5 |
COM 2
| RS485 | D- | D+ | GND | ||
| RS422 | T- | T+ | R+ | R- | GND |
| PIN# | 1 | 2 | 3 | 4 | 5 |
COM 3
| RS485 | D- | D+ | GND | ||
| RS422 | T- | T+ | R+ | R- | GND |
| PIN# | 1 | 2 | 3 | 4 | 5 |
COM 4
| RS485 | D- | D+ | GND | ||
| RS422 | T- | T+ | R+ | R- | GND |
| PIN# | 1 | 2 | 3 | 4 | 5 |
Using one USB-4485 unit:
- Perform a loop back test on one unit:
-
- Connect the TX+ to RX+ and TX- and RX- on one the four RS-422 ports.
- Connect the USB connector on the cable to the USB port of the computer
- Install the USB-4485 FTDI driver on the computer per instructions provided.
- Running a hyper terminal program on the PC, send ASCII characters to the USB-4485 converter from one PC port, and check that the characters are received at the same PC port. This tests that the transmit and receive functions of the USB-4485 unit is working properly.
- When there is constant RX data you should see the associated GREEN light blink. When there is constant TX data you should see the associated RED light blink.
Using two USB-4485 units:
- Check that all connections comply with the connection diagrams.
- Perform a loop back test on two units:
-
- Connect the two D+ to D+ and D- and D- on two USB-4485 RS-485 ports.
- Connect the two USB connectors to the USB ports of the computers.
- Install the USB-4485 FTDI driver on the computer per instructions provided.
- Running hyper terminal programs on both PCs, send ASCII characters to the USB-4485 converter from one PC port, and check that the characters are received at the 2nd PC port. Repeat the test in the opposite direction. This tests that the transmit and receive functions of both USB-4485 units are working properly.
- When there is constant RX data you should see the associated GREEN light blink. When there is constant TX data you should see the associated RED light blink.
Download FREE FULL VERSION AccessPort Advanced Serial Monitor, Simulation and Data Analysis Software Tool. This software tool is great for testing converters. Supports Windows 98/XP/VISTA/WIN 7/WIN 8/WIN 10. DOWNLOAD SOFTWARE AND USER MANUAL
Below are some of the USB to 4 Port RS485 / RS422 Adapter applications.
FIGURE 1: 4 PORT FUNCTIONAL DIAGRAM
FIGURE 2: EXTENDING A COM PORT DISTANCE IN RS485 MODE
FIGURE 3: MASTER / SLAVE MULTI-DROP CONFIG. IN RS485 MODE
FIGURE 4: EXTENDING A COM PORT DISTANCE IN RS422 MODE
