16
1. Ensure that the PV module output is well insulated to ground.
2. Use the positive and negative Staubli MC4 metal terminals and DC connectors supplied with
the SUN2000. Using incompatible positive and negative metal terminals and DC connectors
may result in serious consequences. The caused device damage is not covered under warranty.
3. The DC input voltage of the SUN2000 shall not exceed 1080 V DC under any circumstance.
4. Before installing DC input power cables, label the cable polarities to ensure correct cable
connections.
5. If the polarity of the DC input power cables is reversed, do not operate the DC switch as well as
positive and negative connectors immediately. Failing to do so may cause device damage,
which is not covered under warranty. Wait until the night when solar irradiance declines and
the PV string current drops to below 0.5 A. Then set the DC switch to OFF, remove the positive
and negative connectors, and correct the polarity of the DC input power cables.
Click
Positive metal terminal
Negative metal terminal
Ensure that the cable
cannot be pulled out after
being crimped.
Positive connector
Negative
connector
Use the wrench
shown in the figure to
tighten the locking
nut. When the wrench
slips during the
tightening, the
locking nut has been
tightened.
Ensure that cable
polarities are correct.
PV-CZM-22100 (Staubli)
PV-MS-HZ open-
end wrench
(Staubli)
DC input terminals
If the original DC input power cables are not long enough, add DC input extension cables.
Assembling DC Connectors
Installing DC Input Power Cables
3. Install DC input power cables.
