Huawei SmartLogger2000 Quick Manual page 16

6.3 Connecting an RS485 Communications Cable
NOTE
1. If the SmartLogger connects to an outdoor device over a COM port, you are advised to connect
an RS485 signal SPD to strengthen the surge protection capability. If the SmartLogger
connects to an indoor device, no RS485 signal SPD is required.
2. Ensure that the RS485 communication distance is within 1000 meters.
3. The SmartLogger cable terminal block can connect to a cable with the maximum cross-sectional
2
area of 2.5 mm .
4. A terminal block is recommended for connecting to the SUN2000. The following uses the
SUN2000-50KTL terminal block as an example to describe cable connection.
5. When you connect a terminal block to the SUN2000, you are recommended to use a computer
cable (DJYP2VP2-22 2x2x1) or a communications cable with the cross-sectional area of the
conductor being 1 mm
6. When you connect the RJ45 network port to the SUN2000, you are recommended to use the
CAT 5E outdoor shielded network cable.
1. Remove an appropriate length of the steel armor and insulation layer from both ends of the
cable using a wire stripper.
Unit: mm
2. Connect the cable to the surge port on the RS485 signal SPD.
3. Strip an appropriate length from the other end of the cable and connect the end to the
SUN2000 terminal block.
2
and the cable outer diameter in the range of 14 mm to 18 mm.
Terminal definition:
(1) RS485A IN (2) RS485A OUT
(3) RS485B IN (4) RS485B OUT
NOTICE
1. Verify that the RS485A (IN) port on the
inverter connects to surge port 1 or 7
on the RS485 signal SPD, and that the
RS485B (IN) port on the inverter
connects to surge port 5 or 11 on the
RS485 signal SPD.
2. After connecting cables, wrap the part
without insulation layer using insulation
tape.
RS485 signal SPD
15