CommFront USB-485-1 Instruction Manual

USB to RS-485 Converter
Part Number: USB-485-1
CONTENTS
INTRODUCTION.................................................................................
FEATURES...........................................................................................
SPECIFICATIONS...............................................................................
PIN ASSIGNMENT..............................................................................
CONNECTIONS...................................................................................
DRIVER INSTALLATION – QUICK GUIDE.........................................
DRIVER INSTALLATION – EXAMPLES...............................................
EXAMPLE 1 (WINDOWS VISTA)...........................................................................
EXAMPLE 2 (WINDOWS XP).................................................................................
EXAMPLE 3 (WINDOWS 2000)............................................................................
TROUBLESHOOTING...........................................................................
GENERAL.....................................................................................................................
DRIVER REINSTALLATION EXAMPLES................................................................
SUPPORT............................................................................................
Windows 8 / 7
For Windows 8 and 7, drivers will be installed automatically when your computer
is connected to the Internet. Alternatively, you may install the drivers from the
CD provided with the product.
Revision: 1.0 www.CommFront.com
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■ INTRODUCTION
The USB-485-1 is a port-powered USB to RS-485 converter that can be used to convert any standard
USB port (USB 2.0 - backward compatible) into a two-wire balanced RS-485 port and vice versa. The
unit can be used to communicate with one loop of up to 256 units of RS-485 devices and it comes
with a built-in selectable 120-Ohm terminator for system reliability and easy installation. This USB to
RS-485 converter cable is powered from the USB port and it supports data auto-sensing &
self-adjusting, therefore, no baud rate setting is required; and with the data direction
auto-turnaround technology, no flow control is necessary for RS-485 communications. The USB-485-1
uses the latest FTDI chipset and is fully compatible with Windows 8/7/Vista/XP/Server 2008/Server
2003/2000/98 (32-bit), Windows 8/7/Vista/XP/Server 2008/Server 2003 (64-bit), Win CE, Mac, and
Linux.
■ FEATURES
 Adds one RS-485 port to your USB port.
 Supports 256 nodes of 2-wire RS-485 devices.
 Rugged terminal block with built-in selectable 120Ω terminator.
 Operates reliably from 300 to 3M baud.
 Supports Windows 8/7/Vista/XP/Server 2008/Server 2003/2000/98 (32-bit), Windows 8/7/Vista
/XP/Server 2008/Server 2003 (64-bit), Win CE, Mac, and Linux.
 Supports remote wakeup and power management.
 Built-in 15kV ESD static and circuit protection.
 Port-powered, no external power required.
 Plug and play (hot-pluggable, data format auto-sensing and self-adjusting).
 Data direction auto-turnaround, no flow control is required.
 No IRQs required, no IRQ conflicts.
 Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
 Safety: Strictly certified by SGS (Cert no. E1/2013/90010C; E1/2013/90011C).
 5-year manufacturer's warranty.
■ SPECIFICATIONS
Compatibility: USB 2.0 and EIA/TIA RS-232/RS-485 standards
Power Source: From USB port
Current Consumption: Less than 60mA
RS-232 Data Rate: 300 to 3M bps (auto-sensing and self-adjusting)
Distance: USB side: 10ft (3m); RS-485 side: Up to 4000ft (1.2km) at
19,200 bps
Connectors: USB side: Type A Female; RS-485 side: DB-9 Male/5-Way
Terminal Block
LEDs: TX, RX and Power
Maximum number of drops: 256
End-of-Line Terminator: 120Ω (built-in, selectable)
Static Protection (ESD): Up to 15KV
Dimensions (H x W x D): 0.8 x 1.3 x 3.6 in (20 x 32 x 92 mm) (excluding cable)
Cable Length: 3.3 ft (1 m)
Weight: 3.8 oz (108 g)
Operating Temperature: 32ºF to 104ºF (0ºC to 40ºC)
Operating Humidity: Up to 90% RH (no condensation)
■ PIN ASSIGNMENT
RS-485 Side (DB-9 Male Connector / Terminal Block):
DB-9 Male: 1 2
Function: B- A+ GND
Terminal Block: A+ B-
Function: RS485+ RS485- GND
Revision: 1.0 www.CommFront.com
5 6,7
Tie to turn ON the 120Ω
end-of-line terminator
G 120
Tie to turn ON the 120Ω
end-of-line terminator
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