Salda MCB - Page 24

24 | EN MCB_miniMCB v2019.1
X21
1 DI1
Outdoor air electrical preheater automatic protection
(NC)
2 +12VDC
DX cooler defrost input/ Water pre-heater circulation
pump fail
3 DI2
Outdoor air electrical preheater manual protection
(NC)
4 +12VDC
5 DI3
System mode switch
6 +12VDC
7 DI4
Fans speed switch
8 +12VDC
X22
1 DI5
DX cooler protection (NC)
2 +12VDC
3 DI6
Supply air lter pressure switch (NO)
4 +12VDC
5 DI7
Extract air lter pressure switch (NO)
6 +12VDC
7 DI8
Fire place protection relay input (NC)
8 +12VDC
X23
1 DI9
Fire damper opened input (NC)
2 +12VDC
3 DI10
Fire damper closed input (NC)
4 +12VDC
5 DI11
Recirculation damper closed input (NC)
6 +12VDC
X24
1 GND
Outdoor air preheater control output (0-10VDC)
2 AO1(0-10VDC)
3 GND
DX cooler control output (0-10VDC)
4 AO2(0-10VDC)
5 GND
Hydronic cooler control output (0-10VDC)
6 AO3(0-10VDC)
X25
1 PE
Recirculation damper control output (0-10VDC)2 GND
3 AO4(0-10VDC)
4 GND Rotor control output/
5 AO5(0-10VDC) By-pass position control output (0-10VDC)
X26
1 +24VDC
Recirculation damper step motor control
2 STEP_A
3 STEP_A/
4 STEP_B
5 STEP_B/
6 +24VDC
X27
1 IND_1
Working indication output (24VDC; max 50mA, 1.2W)
2 +24VDC
3 IND_2
Alarm indication output (24VDC; max 50mA, 1.2W)
4 +24VDC
X28
1 GND Supply/Extract air CO2/RH sensor input\
2 AI1 (0-10V) Supply/Extract pressure sensor input (0-10VDC)
3 GND Supply/Extract air CO2/RH sensor input\
4 AI2 (0-10V) Supply/Extract pressure sensor input (0-10VDC)
5 GND
Reserved input (0-10VDC)
6 AI3 (0-10V)
X29
1 GND
Hydronic cooler ret. uid temperature sensor
2 AI4 (NTC)
3 GND
Hydronic preheater ret. uid temperature sensor
4 AI5 (NTC)
X30
1 +24VDC
24VDC Power supply for Air quality sensor I2 GND
3 PE
4 +24VDC
24VDC Power supply for Air quality sensor II
5 GND
6 PE
XH1
1 GND
Power supply for air quality sensors, max. 20mA
2 +5VDC
3 GND
4 +5VDC
LED1 EX1 status LED