V i t a l W e l l E l e c t r o n i c s P t e L t d
w w w . v i t a l - w e l l . c o m
- 2 -
2)
Typical Connections (connections at Pin1~4 only)
I.3.2: VWxxxxA-232C
For the RS232 TXD/RXD signals, the voltage level at the interface
is RS232C level. The other signal assignment is the same as VW-232T.
I.3.3: VWxxxxA-485
Signal Definitions
：
Pin No.
Signal Name
Pin No.
Signal Name
１
GND
６
TD-
２
VCC (+5V)
７
I/O2
３
RD+
８
I/O3
４
RD-
９
N.C
５
TD+
I.3.4: VWxxxxA-USB
The interface is USB. It will take power from the USB port. So no
external power supply needs. After installing a driver, it will create a
virtual serial port on the PC. All applications, which designed for serial
ports, will be able to work well with this module. E.g., It allows the PC to
use a normal hyper-terminal application to communicate with the module.
Please be noted, depends on the USB ports on the PC, the driver
will automatically create different
“
virtual
”
serial port numbers. For
example, the PC has 4 USB ports, say, we just name them at USB1,
USB2, USB3, USB4. When the module plugs into USB1, it may create a
virtual serial port, say COM3; When the module plugs into USB2, it will
create another virtual serial port, say COM4; then, COM5, and COM6, etc.
Signal Definitions
：
Pin No.
1
2
3
4
Signal Name
+5V
DM
DP
GND
1 (GND)
２
(+5V)
３
(RXD)
４
(TXD)
１
(GND)
２
(+5V)
３
(RXD)
４
(TXD)
RF
－
VW series
Host
