BROWSE
BROWSE Product Category
RS232 TO RS485 CONVERTERS
RS232 TO RS422 CONVERTERS
RS485 TO RS422 CONVERTERS
SERIAL TO TTL CONVERTERS
USB to SERIAL ADAPTERS
ISOLATORS & SUPPRESSORS
SERIAL DATA REPEATERS
FIBER OPTIC CONVERTERS
ETHERNET TO SERIAL CONVERTERS
ACCESSORIES
- General Info
- Specifications
- Pinouts
- Images
- Troubleshooting
- Applications
DESCRIPTION
The SerialComm USB-4485 is a high quality, high performance industrial-grade bi-directional port powered or external powered 4 port USB to RS485 / RS422 converter housed in a heavy-duty steel case. It can convert any standard full duplex USB port to four RS485 or RS422 ports and is bi-directional half-duplex for RS485 and full duplex for RS422 via COM ports on the host computer. The USB to 4 port RS485 / RS422 converter utilizes the FTDI chipset making it compatible with most computer systems and operating systems. The unit is powered from the USB port and requires no external power but can also be powered with an external power supply. It also features data direction auto-turnaround eliminating the need for flow control.. The USB-4485 features a professional terminal block with optional selectable 120 Ohm termination via a jumper. The USB-4485 has a Type A female connector on the USB side and four DB9 male connectors on the RS485 / RS422 side. The multiple port converter includes 4 professional terminal blocks with optional selectable 120 Ohm termination. The terminal blocks and software drivers are included with the converter.
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 – 10.15, and Linux.
INDUSTRIAL USB TO 4 PORT RS485/RS422 ADAPTER
90-day Money Back Guarantee / 5-year Replacement Warranty
SerialComm Model: USB-4485
FEATURES
- Plug-and-Play (hot-pluggable)
- Adds four RS485/RS422 ports using one USB port
- Operates from 300 to 230,400 baud
- Optional terminal block included
- Built-in optional selectable 120 Ohm termination
- USB 1.1 and 2.0 compatible
- Port powered - no external power needed
- Supports all RS232 signals: TX, RX, RTS, CTS, DTR, DSR, RI and GND
- 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 surge and static protection
- MTBF(Mean Time Before Failure): 885,034 Hours
- 5 year manufacturer's warranty
- CE, FCC, RoHS 3, and REACH certified
| COMMUNICATION | |
| STANDARDS: | USB 2.0 and 1.1 Standards - RS485 and RS422 Standards |
| BAUD RATES: | From 300 Baud To 230,400 Baud |
| CONNECTOR TYPES: | USB-Side: Type B Female and RS485/RS422 Side: DB9 Male or Dual Function 5 Position Terminal Block |
| DISTANCE: | USB Side: 10 ft (3m) and RS485/RS422 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, RoHS 3, and REACH 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
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 |
DB9 MALE
INCLUDED TERMINAL BLOCKS
FRONT PANEL
BACK PANEL
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 RS422 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 RS485 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 7/8/10/11. DOWNLOAD SOFTWARE AND USER MANUAL
FIGURE 1 - 4 PORT FUNCTIONAL DIAGRAM
FIGURE 2 - EXTENDING A COM PORT DISTANCE IN RS485 MODE
FIGURE 3 - MASTER/SLAVE MULTIPLE DROP CONFIG. IN RS485 MODE
FIGURE 4 - EXTENDING A COM PORT DISTANCE IN RS422 MODE
