dolycon CT112 Series - Page 22

Solar Pump Inverter Chapter 3 System Collection Diagram
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3.2 CT112A Main Circuit Terminals
3.2.1 Terminals description of CT112A
No Terminal name Pin definition
1 AC input terminal
1．L
2
．
N
3．PE
2
PV input terminal: negative
-DC INPUT
3 PV input terminal: positive +DC INPUT
4
External keypad terminal
RJ45
5 Water level indication switch
1. DI3
Short circuit: water shortage. Direct
short-
circuit running without water
level sensor
2.COM
6
Functional terminal
1．485+
2
．
485-
3．DI2 Short circuit: full water
4
．
DI3
Short circuit: water shortage
5．COM
6
．
AIN
Pressure sensor
7．+24V
8
．
PE
7 AC output terminal
1．U
2
．
V
3．W
4
．
PE
8 Solar/mains switch
1. DI4
Solar restrict switch,
F05.04=42, DI4 setting
2. COM
3.2.2 Power terminal description
3.2.2.1 Terminal 1 is AC input terminal, which is involved in the model supports mains input.
Live wire of the grid links with L, neutral wire links with N, earth wire links with PE.
(Attention: make sure PE is connected reliably for safety)