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B.
Control Specifications
I/O Port Definitions
Abbreviations
Ts = Setting temperature
AUX1 = Cooling water free contact
Tr = Room air temperature
AUX2 = Heating water free contact
Ti1 = Water inlet temperature
V1 = Cooling water on/off valve
Ti2 = Water outlet temperature
V2 = Heating water on/off valve
I/O
Code
2-Pipe
Analogue Input
Return air Sensor
AI1
Return air temperature (Tr)
Chilled water Sensor
AI2
Water inlet temperature sensor (Ti1)
Hot water Sensor
AI3
Water outlet temperature sensor (Ti2)
Input
IR receiver
X-DIS 1
Digital communication port to LED display/IR receiver board.
Wired wall pad
TTL1
Digital communication port to wired wall-pad board.
Digital input
Occupancy contact
ON/OFF
NO/NC contact by setting
Float switch
Float
Voltage-free (NC).
The contact is connected with float switch (NC).
Electrical heater safety
switch
EH
Voltage-free (NC).
The contact is connected with E-heater.
Power input
Phase
L
Power supply to the PCB;
Neutral
N
Power supply to the PCB;
Earth
G
Power supply to the PCB;
Voltage output
Fan 1
CN4
Fan 1 driver
Valve1
V1
On/off valve
Valve2
V2
On/off valve
Water pump
WP
Voltage output (L), Power supply to condensate pump.
Electric heater
Heat
Voltage output (L), maximum 10A.
Output
Stepping motor
CN1, CN2
Power supply to louver stepping motors.
Cooling free contact.
AUX1
Voltage free contact. Maximum load 5A.
Heating r free contact.
AUX
Voltage free contact. Maximum load 5A.
Modulating valve control
DA1
0~10Vdc for cooling water modulating valve control
Modulating valve control
DA2
0~10Vdc for heating water modulating valve control
In Modbus signal
AB
Terminals for local network serial connection
Out Modbus signal
AB
2019-IOM-SWC-V-EC-I-001
