User`s manual

Radio Power
In order to provide maximum flexibility for the user the PCFW-104 allows for powering of the
Radio Module from either the PC/104 Bus 12 VDC supply or an external 6-30 VDC source.
PC/104 Bus Power
Place jumper JP3 in the INT position (jumper nearest PC/104 Connector).
The radio module is now powered from the PC/104 bus an no further connections are re-
quired. It is important to be sure that the 12 VDC bus power source has sufficient current to
supply the radio. It is recommended that the supply have at least 1.0 Amp capacity @ 12 V.
External Power
Place jumper JP3 in the EXT position (jumper farthest from PC/104 Connector). The radio
power now comes from terminal block J4. Note polarity! The positive terminal is marked with
a + and is the terminal farthest from the PC/104 Connector. Be sure to tighten the terminals
snugly.
The radio can be powered from any 6-30 VDC source such as vehicle power as long as the
source is capable of at least 1 Amp.
Caution
Observe polarity when powering radio from external power!
When using external power sources for the radio modem it is essential that the external
radio power and PC/104 stack be switched at the same time as described earlier in this
manual. It is recommended that if vehicle power is used the radio and PC/104 stack be
switched from the same master power switch. Powering the radio and not the stack could
potentially damage either the radio or the stack. Similarly, powering the stack and not the
radio can also potentially cause damage.
Setup Switch
In order to access the FreeWave Radio setup menus it is necessary to drive the setup line
on the radio low. This can be achieved two ways. One, the PCFW-104 incorporates a setup
switch. Pressing this switch while in a terminal program such as Hyper Terminal will invoke the
user setup menu and allow the radio to be configured for the users network.
Since the PCFW-104 is to be used in remote embedded applications inside a case Connector
J5 is available to facilitate the installation of a external setup switch. Shorting the pins on J5
invokes the user setup menu. Never apply power of any type to J5.
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