![background image](http://html1.mh-extra.com/html/omron/f250/f250_setup-manual_741266049.webp)
45
F250
Setup Manual
SECTION 4
Connecting External Devices
SECTIO
N
4
Co
nn
ecting
thro
ug
h the
Se
rial Inter
face
Wiring
Keep the cable length less than 15m.
RS-232C
RS-422
* Pin numbers on the external device will depend on the device being connected.
Refer to the manual for the personal computer or PLC being connected.
Controller
Signal
Pin
SD
2
RD
3
GND
9
External device
Pin
Signal
*
SD
*
RD
*
GND
RS/CS control cannot be used.
Use only shielded cable.
Controller
Signal
Pin
RDB(+)
5
RDA(-)
6
SDB(+)
7
SDA(-)
8
External device
Pin
Signal
*
RDB(+)
*
RDA(-)
*
SDB(+)
*
SDA(-)
Use only shielded cable.