PfofiBus Gateway
4.4 How to Connect the Teaching Tool When the Positive Terminal of the
24-V Power Supply Is Grounded
If the positive terminal of the 24-V power supply is grounded (= +24 V is grounded), use a SIO converter
as shown below to connect a teaching pendant or PC to the gateway unit. In this case, do not connect the
FG of the SIO converter.
Teaching pendant
PC, etc.
Do not allow the FG of the PC to be connected to
ground. If the FG may be connected to ground via
other COM port, disconnect the communication
cable from the applicable COM port.
PC software
RS232 connection type
<Model number: RCM-101-MW>
USB connection type
<Model number: RCM-101-USB>
* The cables are supplied with the
PC software.
SIO converter (optional)
(with built-in terminal resistor)
Model number: RCB-TU-SIO-A (B)
Gateway unit
Do not
connect
the FG.
* One e-CON connector, one junction
and one terminal resistor are supplied
with each controller link cable.
e-CON connector (3-1473562-4 by AMP)
Junction (5-1473574-4 by AMP)
Terminal resistor
Controller link cable
Model number: CB-RCB-CTL002
24-V power
supply
With the gateway unit system, the negative terminal of the 24-V power supply should be grounded (= 0 V
should be grounded), as a rule. Since most teaching pendants and PCs have their communication ground
line and FG (frame ground) shorted internally, grounding the positive terminal of the 24-V power supply (=
gro24 V) will cause shorting of the 24-V power-supply circuit when a teaching pendant or PC is
connected to the gateway unit, thereby damaging the teaching pendant or PC.
Caution
Do not connect the FG of the SIO converter.
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