IAI America REXT - Manual (Page 296)

Part 2 Startup Chapter
Chapter 2 Mounting and Installation
270
Part 2 Startup Chapter
Teaching pendant
PC, etc.
Do not
connect
the FG.
Do not connect the FG of the PC to ground.
If the FC may be connected to ground
through other COM port, disconnect the
communication cable from the applicable
COM port.
PC software
RS232 connection type
USB connection type
* The cable is supplied with the PC software.
SIO converter (optional)
(with built-in terminal resistor)
Model: RCB-TU-SIO-A (B)
* One e-CON connector, one junction and one
terminal resistor are supplied with one
controller link cable.
e-CON connector (3-1473562-4 by AMP)
Junction (5-1473574-4 by AMP) GateWay
R unit
Terminal resistor
Controller link cable
Model: CB-RCB-CTL002
24-V power supply
2.2.9 How to Connect Teaching Tool When Grounding Positive Terminal of 24-V Power
Supply
If the positive terminal of the 24-V power supply is grounded (= the +24-V side is grounded), use a SIO converter as shown
below to connect a teaching pendant or PC to the Gateway R unit. At this time, do not connect the FG of the SIO converter.
With the ROBONET, basically the negative terminal of the 24-V power supply is grounded (= the 0-V side is grounded).
Since most teaching pendants and PCs have their communication ground line and FG (frame ground) shorted internally,
grounding the 24-V power supply at the positive terminal (= grounding the +24-V side) will cause the 24-V power supply to
short when a teaching pendant or PC is connected to the Gateway R unit, resulting in damage to the teaching pendant or PC.
Caution
Do not connect the FG of the SIO converter.
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