FOX3-KMD H
ARDWARE
M
ANUAL
V
ERSION
1.0.1
5. FOX3-KMD APPLICATION INTERFACE
5.1. Power supply
The power supply for the FOX3-KMD devices has to be a single voltage source of V
+IN
=
+10.8 V
...
+32.0 V
DC. The
operating voltage (V
+IN
) has to be applied permanently to the FOX3-KMD devices and able to provide sufficient
current of up to
1.5 A
(pulse).
The operating voltage (V
+IN
and GND) is not protected against voltage spikes and reverse polarity, but
NOT
protected against continuous overvoltage.
NOTE: Operating voltage range must never be exceeded; care must be taken in order to fulfill min/max
voltage requirements.
Signal name
I/O
Parameter
Description
+IN
I
+10.8 V...+32.0 VDC.
Positive operating voltage.
GND
-
0 V
Ground (should be isolated from the vehicle grounds)
5.1.1. Automatic shutdown
Automatic shutdown takes effect if:
under voltage is detected and internal battery level runs below the nominal voltage.
5.2. Determining the External Equipment Type
Before you connect the serial port pins of the FOX3-KMD devices to an external equipment, you need to
determine if the external hardware serial ports are configured as DTE
(Data Terminal Equipment)
or DCE
(Data
Communications Equipment)
.
FOX3-KMD is designed for use as DCE devices. Based on the conventions for DCE-DTE connections, it
communicates with the customer application (DTE) using the following signals:
FOX3-KMD Terminal (DCE)
to
Application (DTE)
RxA
<----------
TXD
TxA
---------->
RXD
GND
-
GND
Table 3:
The signaling definitions between DTE and DCE.
This confidential document is a property of FALCOM GmbH and may not be copied or circulated without previous permission.
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