IAI America RCM-GW-DV - Manual (Page 41)

35
DeviceNet Gateway
Teaching pendant PC, etc.
Make sure the FG on the PC is not connected to
ground. If the FG 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)
Do not
connect
the FG.
* One controller link cable comes with one
e-CON connector, one junction and one
terminal resistor.
e-CON connector (3-1473562-4 by AMP)
Junction (5-1473574-4 by AMP)
Gateway unit
Terminal resistor
R = 220
Ω
Controller link cable
Model: CB-RCB-CTL002
24-V
power supply
4.4 How to Connect Teaching Tools When Grounding the Positive Terminal of the 24-
V Power Supply
If the positive terminal of the gateway unit’s 24-V power supply is grounded (= +24-V side 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 on the SIO converter.
With a gateway system, basically the negative terminal of the 24-V power supply is grounded (= 0-V side
is grounded). Since most teaching pendants and PCs have their communication GND line and FG (frame
ground) shorted internally, grounding the positive terminal of the 24-V power supply (= grounding
the +24-V side) will cause the 24-V power supply to short when a teaching pendant or PC is connected,
consequently damaging the teaching pendant or PC.
Caution
Do not connect the FG on the SIO converter.