Precautions for PC connection to REC gateway unit grounded at positive terminal of 24 VDC power supply
ME0394-1A
Intro-11
Precautions for PC connection to REC gateway unit
grounded at positive terminal of 24V DC power supply
If the EC gateway unit is grounded at the positive terminal of the 24 VDC power supply, a
PC cannot be connected to the USB connector (mini-B) of the EC gateway unit.
If connected directly, short-circuiting of the power will occur as shown in the diagram below,
causing malfunction of the PC.
USB A type
5 V
-DATA
+DATA
GND
FG
EC Gateway unit
Communication cable for PC software
USB cable (A, mini-B)
GND and FG
shorting
within PC
USB mini-B type
5 V
-DATA
+DATA
GND
+24 V
0 V
PC
Содержание Rec
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