Fastrack M1306B User Guide
Functional Description
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WM_PRJ_M13_UGD_001 -003 November 11, 2006
7.2 Power Supply
7.2.1 General Presentation
The M1306B is supplied by an external DC voltage (V+BATTERY) from +5.5 V to +32
V at 2.2 A.
Main regulation is made with an internal DC/DC converter in order to supply all the
internal functions with a DC voltage.
Correct operation of the Fastrack M1306B in communication mode is not guaranteed
if input voltage (V+BATTERY) falls below 5.5 V.
Note:
The minimum input voltage specified here is at the M1306B input. Be careful of
the input voltage decrease caused by the power cable. See paragraph 8.2.1 for more
information.
7.2.2 Protections
The M1306B is protected by a 800 mA / 250 V fuse directly bonded on the power
supply cable.
The M1306B is also protected against voltage over +32 V.
Filtering guarantees:
• EMI/RFI protection in input and output,
• Signal smoothing.
7.3 RS232 Serial Link
7.3.1 General Presentation
The RS232 interface performs the voltage level adaptation (V24/CMOS ⇔ V24/V28)
between the internal Wireless CPU
®
(DCE) and the external world (DTE).
The RS232 interface is internally protected (by ESD protection) against electrostatic
surges on the RS232 lines.
Filtering guarantees:
• EMI/RFI protection in input and output,
• Signal smoothing.
Signals available on the RS232 serial link are:
• TX data (CT103/TX),
• RX data (CT104/RX),
• Request To Send (CT105/RTS),
• Clear To Send (CT106/CTS),
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