10.9 I/O TABLE OF THE BOARD
POWER SUPPLY
L
Phase
N
Neutral
INPUTS
I1
NTC ambient air sensor
I2
NTC water sensor
NTC hot water sensor (4-pipe hydronic indoor
I3
unit)
I4
Not used
I5
Not used
IC
Common input for NTC sensors
+5
Not used
I6
Input for remote ON/OFF
I7
Input for remote SUM/WIN
I8
Input for remote ECONOMY
I9
Not used
I10
Not used
IC
Common input for I6, I7, and I8
SU-SU
Humidity probe
OUTPUTS
A1
Brushless fan modulation
A2
Water valve modulation (cold, for 4-pipe hydron-
ic indoor unit)
Hot water valve modulation (only 4-pipe hy-
A3
dronic indoor unit)
CA
Common output for 0-10V outputs
01
Extra-low speed
02
Minimum speed
03
Medium Speed
04
Maximum speed
Water valve (cold, for 4-pipe hydronic indoor
05
unit)
Hot water valve (only 4-pipe hydronic indoor
06
unit) or heating element
C1
Common output for relay outputs O1-O6
07
Configurable signalling output
C7
Common output for relay output O7
PORTS (FRONT OF CIRCUIT BOARD)
A/B/GND
MODBUS protocol RS485 serial port
User interface connection or according to circuit
+/-
board
User interface connection or according to circuit
+/-
board
26
FWTOUCH