Rs485Sio - IAI RoboNet Operation Manual

(4) RS485SIO

Using the 2-wire method, connect the GateWayR unit (RGW-SIO) to the RS-422A/485 port on the serial communication unit
(SCU) of the PLC, as shown below.
GateWayR unit
Cable connector (supplied)
MC1.5/4-ST-3.5 (manufactured by
Phoenix Contact)
Signal Explanation
name
SA Communication line A (+)
SB Communication line B (-)
SG Signal ground
FG Frame ground
Use a shielded twisted pair cable (AWG28-16) for the communication cable.
GateWayR unit
Caution
1. The polarities of corresponding pins are reversed on the ROBONET end and PLC end of the communication line.
When connecting the ROBONET and PLC, connect the pins of the same polarities.
SA (+) on GateWayR ⇔ SDB (+) on SCU, SB (-) on GateWayR ⇔ SDA (-) on SCU,
2. Connect the shield to ground only on the PLC-SCU end.
Connector pin arrangements
Pin No.
1 *1
2 *1
3
4
5
6 *1
7
8 *1
9
Shell *2
*1 For 2-wire connection, use pins 1 and 2, or pins 6 and 8.
*2 The shell is connected to the ground terminal (GR) of the
power-supply unit through the SCU. Accordingly, the shield
will be grounded when the GR of the power-supply unit is
connected to ground.
Shield
Part 2 Startup Chapter
PLC-SCU
RS-422A/485 connector
(D-sub 9-pin male connector as
viewed from the soldered side)
Abbreviation Signal name
SDA Send data -
SDB Send data +
NC Not used
NC Not used
NC Not used
RDA Receive data -
NC Not used
RDB Receive data +
NC Not used
FG Shield
Shell
Input/output
Output
Output
-
-
-
Input
-
Input
-
-
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