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3.7
Connecting System Ground
Separate the frame ground from the signal ground at the
user system. Failure to do so will result in a FIRE HAZARD
and will damage the user system and the emulator product or
will result in PERSONAL INJURY.
The emulator's signal ground is connected to the user system's signal ground. In the emulator, the
signal ground and frame ground are connected. In the user system, connect the frame ground only;
do not connect the signal ground to the frame ground (figure 3.12).
If it is difficult to separate the frame ground from the signal ground in the user system, set the
GND for DC power input (AC adapter) of the host computer and the frame ground of the user
system as the same potential. If the GND potential is different between the host computer and the
target system, an overcurrent will flow in the low-impedance GND line and thin lines might be
burned.
Signal ground
Host
USB
computer
Power
supply
WARNING
E10A-USB Multi emulator
Signal
Logic
Signal ground
Figure 3.12 Connecting System Ground
Section 3 Preparation before Use
User system
Signal
Logic
Signal ground
Frame ground
Rev. 1.00 Nov. 26, 2007 Page 33 of 230
REJ10J1766-0100
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