
Precautions for PC connection to REC gateway unit grounded at positive terminal of 24 VDC power supply
Intro-12
ME0394-1A
If the gateway unit is grounded at the positive terminal of the 24V DC power supply, use an
SIO isolator (RCB-ISL-SIO) as shown in the diagram below when connecting a PC to the
SIO connector of the gateway unit.
If a PC is connected to the gateway unit without using an SIO isolator, the power will short-
circuit and cause the PC to malfunction.
Caution
●
RS-232 conversion unit (RCB-CV-MW) cannot be used.
GND
FG
PC
Conversion unit
(RCB-CV-USB)
5 V
SGA
SGB
GND
FG
5V1
SGA SGA1
SGB SGB1
GND
GND1
FG
EC Gateway
unit
SIO isolator
(RCB-ISL-SIO)
+24 V
0 V
Insulation
Isolator communication cable
CB-RCB-SIO***
will be required separately.
5 V
SGA
SGB
GND
Summary of Contents for Rec
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