4 SETTINGS AND PROCEDURES PRIOR TO OPERATION
4.4.2 Connecting the
The following shows the connection precautions and connection examples when using the Q series C24
(1)Connection precautions
(a)When connecting the Q series C24 SG and FG signals to the external device, connect them according to the specifications of the external device.
(b)Connect the shield of the connection cable to the FG terminal on either of the connected devices.
If normal data communication is not obtained due to external noise even if wiring is made as shown above, perform wiring as follows:
1)Connect between the FG of both stations with the shield of the connection cable.
On the external device side, however, follow the instruction manual of the external device.
Be sure to use the plate terminals included with the product when connecting the braided shield wire to the
2)Connect the (FG) of the Q series C24 side to the FG terminal at the power supply module of the station which has the Q series C24 is installed, or to the FG terminal of the control panel on which the Q series C24 PLC is installed.
3)Connect nnA and nnB of each signal in the connection cable as a pair.
SDA
SG
SDB
FG 
RDA 
FG 
RDB
Q series C24
SDA
SDB
RDA
RDB
SG
(FG)
(FG) | Shield |
|
External device
RDA
RDB
SDA
SDB
SG
FG
Correspondance of the
4 - 8 | 4 - 8 |