Internal electrical connection



A
Motherboard
B
  1. Extract air fan tacho (WT)
  2. GND (GN)
  3. Extract air fan PWM (YE)
  4. Supply air fan tacho (WT)
  5. GND (GN)
  6. Supply air fan PWM (YE)
C
  1. Extract air
  2. Outdoor air
  3. Supply air
  4. Exhaust air
  5. Supply air from the HR cell
D
LAN
MB_A
External Modbus A signal
MB_B
External Modbus B signal
+24V
+24V voltage (DC)
GND
Digital and analog ground potential
RS_A
Local hardware Modbus A signal
RS_B
Local hardware Modbus B signal
NTC
External temperature sensor connector
D/I1
Digital input 1
D/I2
Digital input 2
11V1
11.1 V operating voltage
AN/I
Analog input 0-10 VDC
RM/I
24V relay input
RM/O
24V relay output
T
Supply air fan
P
Extract air fan
M
Damper motor
TK
Safety switch
AHS
Post-heating control
%RH
Internal humidity sensor
%RH CO2
Internal humidity and carbon dioxide sensor
R1
Post-heating resistor with 90°C and 130°C overheating protection
R2
Additional heating resistor with 90°C and 130°C overheating protection