5
2
CONNECTIONS
2.1 CONNECTION BETWEEN LOAD CONTROL BOARD AND USER PANEL
RPLi
HRC
2
1
Connections:
1: Connection between user panel and load board, to be made with a 4-pole serial cable plus screen (22AWG) supplied;
2: Connection between load board and recovery unit, to be made according to connection needs, following the instructions provided in the next chapter.
Note: the connections from the terminal board (or possible VMF-MOD accessory board) can be 3m max.
2.2 CONTROL BOARD INPUT/OUTPUT
The following tables show the control board input/output: the input/output column indicates the input/output how it is called on the board wiring diagram, the Function
column indicates how the inputs and outputs are used on the various machines in which the board will be installed, the Electrical characteristics column shows the type of
electrical signal that characterises the input/output.
I/O
Function
Electrical characteristics
M2
L: board electric power supply input
Voltage: 230 Vac, 10 A current
M1
N: board electric power supply input
Voltage: 230 Vac, 10 A current
M3
GND: ground reference
//
M4
AUX/RE: output for electric post-heating resistance control
Voltage: 230 Vac, 10 A current
M5
Neutral reference
Voltage: 230 Vac, 7 A current
M6
MA: output for freecooling bypass motor control
Voltage: 230 Vac, 5 A current
M7
Y2: output for electric post-heating resistance control (second stage)
Voltage: 230 Vac, 5 A current
M8
Y1: output for pre heating resistance control
Voltage: 230 Vac, 5 A current
M9
Neutral reference
Voltage: 230 Vac, 10 A current
M10
Neutral reference
Voltage: 230 Vac, 10 A current
M11
V3: output for purification device or output damper control
Voltage: 230 Vac, 5 A current
M12
V2: output for VSL valve control (cooling only)
Voltage: 230 Vac, 5 A current
M13
V1: output for VSL valve control (heating/cooling or heating only)
Voltage: 230 Vac, 5 A current
M14
Support input, not connected
//
M26
Service terminal board
See figure 4
M22
Terminal board not used
//
CN2
SW: SAEXIT water probe (if dip 2 OFF): probe of air expelled to the outside (if dip 2 ON)
NTC 10Kohm
CN1
SAE: outdoor air probe
NTC 10Kohm
CN3
SAM: probe of air introduced into the room
NTC 10Kohm
M15, M16
SA: probe of air expelled from the room
NTC 10Kohm
M17
Out 0-10V: reference for air inflow inverter fan
Voltage: 10 Vdc, 10 mA current
M18
Inverter reference GND
Voltage: 10 Vdc, 10 mA current
M19
Out 0-10V: reference for air expulsion inverter fan
Voltage: 10 Vdc, 10 mA current
M20
GND
Voltage: 10 Vdc, 10 mA current
M21
Not used
Voltage: 10 Vdc, 10 mA current
M25
VMF-MOD expansion connector
//
M27,M28
MS: differential pressure switch status input
Voltage: 5 Vdc, 0.5 mA current
NOTE: the M26 terminal board integrates different specifications, for more details refer to the specific table on the next page.
M26 Terminal board specifications:
CE
GND
CF
A
B
GND
1
TX/R
X
2
GND
-T
TL
3
MODE
4
V5
5
TX/R
X
6
1
2
3
4
5
6
GND
TTL
