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4.3 DC Cable Connection
DANGER
Electric shock!
The PV array will generate lethal high voltage once exposed to sunlight.
Before performing electrical operations, ensure that all cables are uncharged.
Do not turn on the AC circuit breaker before the inverter is electrically connected.
Ensure that the DC switch of the inverter is set to OFF.
4.3.1 Connection Procedure
Step 1: Strip the insulation from each DC cable by 7mm.
Step 2: Assemble the cable ends with the crimping pliers
Step 3: Lead the cable through cable gland, and insert into the insulator until it snaps into place.
Gently pull the cable backward to ensure firm connection. Tighten the cable gland and
the insulator (torque 2.5 N.m to 3 N.m).
Step 4: Check for polarity correctness.
The inverter will not function properly if any PV polarity is reversed.
7
正极端子
负极端子
锁紧螺母
正极外壳
光伏电缆
压接好的端子
密封圈
锁紧螺母
负极外壳
压接好的端子
密封圈
7
PV Cable
Positive
Crimp
Contact
Negative
Crimp
Contact
Press nut
Positive Housing
Seal Ring
Crimped Contact
Press nut
Negative
Seal Ring
Crimped Contact
Housing
固定不动
顺时针转动
专用扳手(x2)
Fixed
Clockwise Rotation
Special Wrench(x2)
FIG 4-7 DC connector assembly
Step 5: Insert the completed DC connector into the corresponding DC connector input terminal of the inverter. Do not remove
the sealing plug on the input end of the vacant DC connector on the inverter to ensure reliable protection. The
connection steps are as follows
：
OFF
V
~
V
mV
O
A
~
mA
~
礎
~
V
999.9
ON
OFF
FIG 4-8 DC cables connection
NOTICE
If the DC input power cable is reversely connected and DC switches are set to ON, do not
immediately turn off the DC switches or reconnect the positive and negative connectors.
Otherwise, the device may be damaged. The caused device damage is not covered under any
warranty. Wait until the solar irradiance declines at night and the PV string current reduces to
below 0.5 A. Then, turn off the three DC switches, remove the positive and negative connectors,
and rectify the connection of the DC input power cable.
4.4 Communication Cable Connection
This series of models provides standard wireless communication function and optional wired communication function.
4.4.1 RS485 communication cable connection (Optional)
Summary of Contents for CSI-15K-T4001A-E
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