Mitsubishi MELFA RH-6SH Series Standard Specifications Manual page 144

3Controller
Control unit R6x2CPU
Connect the NET cable-1 to the RIO1 connector (R6) on the front of the control unit
(R6x2CPU) in the controller. Each unit is connected to from a daisy chain.
Always install a terminator (R-TM) to the last unit.
Note) Use a shield cable for NET cable-1 as a measure against noise.
Fig.3-41 ： Connection method of expansion parallel input/output unit (CR3-535M controller)
Options
3-132
Parallel I/O unit 1 . . . 6
Station No. setting
1 . . . 6
RIO1 connector (R6)
＜CN100＞
RIO1connector
Note)
DCIN connector
NETcable-1
cable
FG
DCcable-2
cable
I/O unit the bottom
Connecta layout
Always connect the shield to FG.
The unit could malfunction because of noise if the shield cable is not used.
Station No. setting
7
＜CN300＞
＜CN100＞
RIO2 connector
RIO1 connector
Note)
NETcable-1
cable
Front
RIO1 connector
RIO2 connector
DCIN connector
Parallel I/O unit 7
RIO2 connector
DCIN connector
R-TM
terminator
FG
DCcable-2
cable
＜CN300＞