12
Connections on PCB
Following is the explanation of connections on Main PCB.
Connector Connects to Usage Voltage
CN1 Switching power supply To supply the power to PCB #1:12V
CN2
MTR-480㧔Option㧕
To connect with interface
CN3
Remote alarm terminal
#1: COM.
#2: N.O.
#3: N.C.
Output for remote alarm contact
CN4 #1-#2: Temp. control relay To control chamber temperature
CN5
#1-#5: Control PCB (CN51)
#6-#7: Buzzer
To control with each switches
CN6 #1-#12: Display PCB (CN52) To connect with each LED
CN7 #7-#8: Comp. sensor To detect compressor temperature
CN8 #1-#2: Battery
To supply the power to Main PCB
during power failure
#2:6V
CN9 Unused
CN11 #1-#3: Temp. sensor To detect chamber temperature
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