CommFront USB-232-1+CVT-485 422-1 Quick Start Manual

USB
Part Number: USB-232-1+CVT-485-1

INTRODUCTION

■
This USB RS485 converter is a port-powered bi-directional USB to RS485 converter, which can be
used to convert any standard full-duplex USB port into a two-wire half-duplex RS485 port and vice
versa. The unit can be used to communicate with one loop of up to 128 units of RS485 devices. The
unit is powered from the USB port and it supports data auto-sensing & self-adjusting, no baud rate
setting is required. And with the data direction auto-turnaround technology, no external power or
flow control is required for RS485 communications.
The unit uses the latest FTDI chipset and is fully compatible with Windows 7/Vista/XP/Server2008
/2003/2000/98 (32-bit), Windows 7/Vista/XP/Server2008/2003 (64-bit), Win CE, Mac, and Linux.
Note: the latest drivers (chipset FT232B) are available at http://www.ftdichip.com/Drivers/VCP.htm.

FEATURES

■
Adds one RS-485 port to your USB port.
•
Communicate with one loop of up to 128 units of RS485 devices.
•
Built-in 120Ω end-of-line terminator for reliability and easy installation.
•
Data direction auto-turnaround, no flow control is required.
•
Supports 300 to 115,200 baud (auto-sensing and self-adjusting).
•
Supports Windows 7/Vista/XP/Server2008/Server2003/2000/98 (32-bit), Windows 7/Vista/XP/
•
Server2008/Server2003 (64-bit), Win CE, Mac, and Linux.
Supports remote wakeup and power management.
•
Plug and play (hot-pluggable, data format auto-sensing and self-adjusting).
•
Port-powered, no external power required.
•
No IRQs required, no IRQ conflicts.
•
Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
•
Safety: Strictly certified by SGS/TUV; 5-year manufacturer's warranty.
•

SPECIFICATIONS

■
Compatibility:
Power Source:
Current Consumption:
Baud Rates:
Distance:
Connectors:
Maximum Number of Drops:
End-of-line Terminator:
Dimensions (HxWxD):
Cable Length:
Weight:
Operating Temperature:
Operating Humidity:

PIN ASSIGNMENT

■
RS-485 (DB-9 Male Connector / Termination Board):
DB-9 Pin:
Terminal Block:
Function:
Revision: A1.1 The design and specifications are subject to change without notice for improvement
RS-485 Converter
USB 2.0 (backward compatible) and EIA/TIA RS-485 standards
From USB port
Less than 100mA
300 to 115,200bps (auto-sensing and self-adjusting)
USB side: 10ft (3m); RS-485 side: Depending on the power from
USB port, will transmit up to 4000ft (1.2km) at 19,200bps
USB side: Type A female; RS-485 side: DB-9 male; Termination
board: DB-9 female and a 4-way terminal block
128
120 (Built-in)
0.63 x 1.3 x 5.5 in (16 x 32 x 140 mm) (excluding cable)
3.3 ft (1 m)
3.5 oz (100 g)
32ºF to 95ºF (0ºC to 35ºC)
Up to 90% RH (no condensation)
1 3 5
A+ B- GND
RS485+ RS485- GND
9
+5V
+5V Terminate/remove Jumper 120 to
measurement turn ON/OFF the 120
terminator
Communications made easy
6,7
Jumper (120)
end-of-line
www.CommFront.com