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SK2019 FMCD-V-ECM-001
Abbreviation: Ti1 = Chilled water coil temperature
I/O Port Definitions
I/O
Code
2-Pipe
Analogue Input
Chilled water Sensor
AI1
Coil sensor (Ti1)
Power input
R1
Lo
230VAC input signals from wired thermostat.
R2
Med
R3
Hi
EH
CN4
230VAC input signals from wired thermostat.
Power input
Phase
L
Power supply to the PCB and all the loads connected to the
voltage outputs.
Neutral
N
Power supply to the PCB and all the loads connected to the
voltage outputs.
Earth
GND
Power supply to the PCB and all the loads connected to the
voltage outputs.
Digital input
Wired wall pad
TTL
Adjust EC motor RPM
Signal input
0 to+5VDC
(0~10VDC)
Signal
0 to +5VDC
,
SW1=0
(0~10VDC, SW1=1)
Output
EC motor
CN3
EC motor output
Stepping motor
CN1, CN2
Stepping motor output
Electric Heater Relay
CN5
When EH signal input is powered on and EC motor
RPM>600rpm, EH output is turned on.
LED Display
X-DIS
LED Display signal