Page
15
February 2010
2.3
Power Supply
The WI-MOD-E module can be powered from a 9 - 30VDC power supply. The power supply
should be rated at 1 Amp. The positive side of the supply must not be connected to earth. The
supply negative is connected to the unit case internally. The DC supply may be a floating supply
or negatively grounded.
The power requirements of the WI-
MOD-E unit is 240mA @ 12V or
150mA @ 24VDC. This is inclusive
of radio and Ethernet ports active, &
serial port plugged in. Transmission
current is nominally 350mA at 12V
(200mA at 24V) for the 100mW RF
unit, and 500mA at 12V (350mA at
24V) for the 300mW RF unit.
A Ground Terminal is provided on the back of the module. This Terminal should be connected to
the Main Ground point of the installation in order to provide efficient surge protection for the
module (refer to the Installation Diagram)
2.4
Serial Connections
2.4.1 RS232 Serial Port
The serial port is a 9 pin DB9 female and provides for connection to a host device as well as a
PC terminal for configuration, field testing and for factory testing. Communication is via
standard RS232 signals. The WI-MOD-E is configured as DCE equipment with the pinouts
detailed below.
Hardware handshaking using the CTS/RTS lines is provided. The CTS/RTS lines may be used to
reflect the status of the local unit’s input buffer. The WI-MOD-E does not support XON/XOFF.
Example cable drawings for connection to a DTE host (a PC) or another DCE hosts (or modem) are
detailed above.
+
_
B
A
-
+
COM
DIO
WI-MOD-E
9 - 30
VDC
RS485
SUPPLY
WI-MOD-E
DB9
MALE
DTE HOST
DB9
FEMALE
WI-MOD-E
DB9
MALE
DCE HOST
DB9
MALE
