Technical information

Chapter 2: Developer Board and Interfaces Description
August 31, 2009 G24/H24 - Developer’s Kit 15
Selecting the Power Source
The Developer Board can be powered using two different power sources:
• Wall-mount power adapter (default source)
• External DC power supply
Important: Only one power source can be used at any given time.
Two jumpers are used for selecting the power source - P203 for Wall-mount adapter and P204 for
the external DC power supply (Figure 2-7, on page 12). The jumpers position for each power
source is described in Table 2-2.
Disconnecting Power
The Developer Board and G24/H24 supplies are separated by two jumpers (P200, P201)
(Figure 2-7, on page 12) that allow disconnecting the power to the Developer Board or to the
G24/H24.
Developer Board. Disconnecting power to the Developer Board is generally used to diagnose
a problem that may be caused by the board. This is independent of power supply to the G24/H24,
which will continue to receive power. The Developer Board Power jumper (P201) (Figure 2-7, on
page 12) positions for connecting and disconnecting power to the Developer Board are shown in
Table 2-3.
G24/H24. Disconnecting the power to the G24/H24 is generally used to connect an amperometer
to the jumper’s two pins to measure the current through the G24/H24. The G24/H24 Power
Jumper (P200) (Figure 2-7, on page 12) positions for connecting and disconnecting power to the
G24/H24 are shown in Table 2-3.
Table 2-2: Power Source Jumper
s (P203, P204)
Reference Description Jumper Connected
Jumper Not
Connected
P203 Wall-mount adapter
power selection jumper
Wall mount adapter is used as the
power source for the G24/H24
Developer board.
Wall adapter is NOT used.
P204 External DC power selec-
tion power.
DC power is used as the power
source for the G24/H24 Devel-
oper board.
DC power is NOT used.