Solar Controller-SCM48100 User Manual
user loads are directly connected to RTN+ bus bar (M5 self-clinching nut is used at the
anode of primary load, while M4 self-clinching nut is used at the anode of primary load).
2 channels of solar sub-array input lightning protection unit provide lightning protection
with protection level of C: The nominal discharge current is 20KA (8/20us).
2.3 Function Introduction to Each System Unit
Notes:
○
1. RTN+: Anode copper bar of the system (when the system needs negative pressure output, use
the conductor to connect this copper bar with PE copper bar);
○
2. 2 MPPT modules;
○3. Signal adapter plate;
○4. Monitoring module;
○5. PV1(+) or PV2(+): 2 channels of sub-array input circuit breaker;
○6. PV1 SPD and PV2 SPD: Each channel of sub-array input lightning protection module
protection unit;
○7. PE: Connected to ground copper bar;
○8. DC-: Cathode interface of backup DC power supply (-48Vdc);
○9. Emergency Button: Emergency button (when storage battery is connected, MPPT module has
no output, and the battery control circuit is in a power-off status, the user may press on this
button until the sound of closing of contactor is heard. Then, the battery control circuit is in a
power-on status);
○10. Primary Load: 4 channels of DC output important load;
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