User`s manual

Temperature Controller MODBUS SIO Driver
GP-Pro EX Device/PLC Connection Manual
58
5 Cable Diagram
The cable diagram shown below may be different from the cable diagram recommended by RKC Instrument Inc.
Please be assured there is no operational problem in applying the cable diagram shown in this manual.
• The FG pin of the main body of the External Device must be D-class grounded. Please refer to the manual of
the External Device for more details.
• SG and FG are connected inside the Display. When connecting SG to the External Device, design the system
not to form short-circuit loop.
• When using RS422/485 (2 wire) or RS422/485 (4 wire) for connection, you can connect maximum 16 units of
Temperature Controller. Note that you can connect maximum 15 units of Temperature Controller when using
RS422/485 (4 wire) to connect the FB400/900 Series.
Cable Diagram 1
Display
(Connection Port)
Cable Remarks
GP(COM1) Your own cable Cable length: 10m or less
Signal name
SD(TXD)3
RD(RXD)2
SG5
2
4
3
Signal name
SD
RD
4 ER(DTR)
SG
RS(RTS)
CS(CTS)
7
8
DR(DSR)
Pin
Pin
D-Sub 9 Pin (socket)
Shield
External Device
6 Shield
Modular 6 Pin
Display
6