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
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CHAPTER I
ELECTRICAL SPECIFICATION
The VW series include 4 different models: RS232T, RS232C, RS485/422,
and USB. The radio performance is the same across all 4 models. They are
named by the different interfaces.
I.1 General Specifications
1)
Supply Voltage
:+5
V
(
±
20%
)
2)
Supply Current
:
< 100mA
3)
Voltage level at I/O
:
+3.3V
TTL
(
+5V
compatible
)
4):
Serial Interface Characteristics (RS232)
i. Baud rate
:
9600, 8N1. (Default)
5)
RF Characteristics
:
i. Frequency band
:
ISM 433/868/915MHz/2.4GHz
ii. Channels
:
16 or 255(for 2.4GHz)
iii. RF rate
:
1.2kbps, 2.4kbpa, 4.8kbps, 9.6kbps, 19.2kps,
38.4kbps, 76.8kbps,
115.2kbps, 256kbps ( VW1100A/VW2500A)
iv. Max RF transmitter power
:
Sub-1G: +10dB; 2.4G : 0dB
v. Sensitivity
:
-116dB (2.4kbps), -108dB(38.4kbps)
vi. Typical link range (outdoor)
:
>1000m
I.2 Dimension
1) (L X W X H): 50mm X 25.2mm X 8mm (VW1100A, VW2500A)
60mm X 26mm X 9mm (VW1203A, VW1205A)
2) Interface
:
9
pin; 2.0mm header
I.3 Interface Specifications
I.3.1: VWxxxxA-232T
The RS232 signal voltage level is 3.3V TTL level at the interface, with
+5V compatible.
1) Signal Definitions
:
Pin No.
Signal Name
Pin No.
Signal Name
1
GND
6
I/O1
2
VCC (+5V)
7
I/O2
3
RXD (RS232
,
TTL)
8
I/O3
4
TXD (RS232, TTL)
9
N.C
5
I/O0 (Sleep /EN)