7
4Installing the RS485 Signal SPD
1. The SmartLogger provides three COM ports.
To connect a COM port on the SmartLogger
to a COM port on an outdoor device, you
are recommended to connect an RS485
signal SPD to strengthen the surge
protection capability.
2. Each RS485 signal SPD can connect to two
COM ports. Each SmartLogger can be
configured with a maximum of two RS485
signal SPDs.
3. If the SmartLogger is installed on a guide
rail, the RS485 signal SPD can share the
guide rail with the SmartLogger. In this case,
the recommended guide rail length is 400
mm or greater.
4. Secure the guide rail before mounting the
RS485 signal SPD.
5Installing the RS485 Signal SPD Ground Cable
An outdoor copper-core cable with a cross-sectional area of 4 mm2or 12 AWG is recommended.
2. Strip a part of the insulation layer from the wire core, and insert the stripped part into port 3
of the RS485 signal SPD.
•Connect the other end of the ground cable to the ground bar.
•To enhance the corrosion resistance of the ground terminal, apply silica gel or paint on it after
connecting the PGND cable.
1. Prepare a ground cable with an appropriate length, and strip 8 mm of the insulation layer
from one end.
3. Tighten the screw on port 3 using a flat-head screwdriver to secure the core wire.
6Connecting Cables to COM Ports
1. The SmartLogger can connect to devices such as the inverter and EMI through its COM ports.
2. The SmartLogger provides three COM ports. To connect a COM port on the SmartLogger to a
COM port on an outdoor device, you are recommended to connect an RS485 signal SPD to
strengthen the surge protection capability.
3. Each RS485 signal SPD can connect to two COM ports. Each SmartLogger can be configured
with a maximum of two RS485 signal SPDs.
