Selecting a Communication Mode
4.5
1. You can choose either the PLC or RS485 communication mode for the SUN2000-33KTL-
A/36KTL/42KTL.
2. FE communication is optional for the SUN2000-36KTL. If you need to use the FE communication 
mode, contact local technical support.
3. If the SUN2000-36KTL adopts FE communication mode, it supports only RS485 and FE 
communication modes, and does not support PLC communication mode.
Installing RS485 Communications Cables4.6
The DJYP2VP2-22 2x2x1 computer cable or a communications cable with a cross-sectional area 
of 1 mm
2
and outer diameter of 14–18 mm is recommended.
1. When routing communications cables, separate communications cables from power cables to 
prevent communication from being affected.
2. An RS485 cable can connect to either a terminal block or an RJ45 network port. It is 
recommended that the RS485 cable connect to a terminal block.
Connecting to a terminal block (recommended)
• If PLC is used, you do not have to connect any cable to the SUN2000, but have to connect AC 
power cables to the PLC CCO module or SmartLogger2000. For detailed operations, see the 
PLC CCO01A User Manual or SmartLogger2000 User Manual.
• If RS485 is used, do not connect the PLC CCO module to the AC power cable.