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3. Terminal arrangement diagram
C1
A
RS-485
B
FG
Terminal blocks of controller：
1 is common terminal COM1； 2 is input terminal for emergent stop signal； 3 is remotely controlled
on/off signal input terminal； 4 terminal is used to detect oil filter blocked； 6 is RS485 A; 7 is RS485 B；
8 is the simulated ground (Earth)；17 and 18 are the AC20V power source；22、23 terminals are
Pressure Sensor signal input；24、25、26 terminals are motor mutual inductor CT1 input；27、28、2
terminals are Fan mutual inductor CT2 input；30、31 terminals are Temperature Sensor signal input；
19、 20、 21 terminals Used to detect the phase sequence and voltage； 13 terminals is common terminal
of output relay；14 terminals controls fan；15 terminals controls load valve；16 terminals controls
angle-shaped contactor；17 terminals controls star-shaped contactor；18 terminals controls main
contactor.
NOTE: Eelectromagnetism coil shall be connected with surge absorber during
wiring, and dotted lines are extendable functions.
5. Control principles
1. Local Automatic control
①. Press down start button for starting: (Y-△start)
There is fives of self-test after controller is energized and it can not be started by pressing start
、
21
19
11
12
20
uc
ub ua
Figure 4.2.1 Terminal arrangement diagram
△
13 14 15 16 17 18
a
b
CT2
c
A
CT1
B
C
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