4.7.2.2 Topvex External Connections
Table 4: Connections to external functions
Terminal
block
Description
Remark
PE
Ground
N
N
Earthed neutral (supply voltage)
Used for phase 230V 1~ and
400V 3~
L1
L1
Phase (Main supply voltage)
Used for phase 230V 1~
if the unit has this mains
supply
400V 3~/230V 3~
L2
L2
Phase (Main supply voltage)
400V 3~/230V 3~
L3
L3
Phase (Main supply voltage)
400V 3~/230V 3~
1
G
Auxiliary supply (Pressure transmitter.
Water valve actuators)
24V AC
2
G0
Reference (Water valve actuator mains
supply)
24V AC
10
DO ref
DO reference
G (24V AC)
12
1
DO 2
Outdoor/Exhaust air damper
24V AC
Max. 2,0 A continuous load
WP
L1
Circulation pump hot water system
230V AC
14
DO 4
Cooling pump
24V AC
15
DO 5
DX Cooling step 1
24V AC
16
DO 6
DX Cooling step 2
24V AC
17
DO 7
Alarm output for DO signals
24V AC
30
AI Ref
Supply air temperature sensor reference
neutral
31
AI 1
Temperature sensor, supply air
40
Agnd
UI reference
neutral
41
2
UAI 1/(UDI 1)
Pressure transmitter extract air
42
UAI 2/(UDI 2)
Pressure transmitter supply air
44
UAI 3/(UDI 3)
Frost protection sensor water heating
battery
Use terminal 40 as reference
DI ref
Extended running/Fire alarm reference
+ 24V DC
P1:50/P2:60
B
Exo-line B
Modbus, Exo-line
connection
P:151/P2:61
A
Exo-line A
Modbus, Exo-line
connection
P1:52/P2:62
N
Exo-line N
Modbus, Exo-line
connection
74
3
DI 4
Extended running
Normally open contact
Use terminal 4 as reference
75
DI 5
Fire alarm
Normally open contact
Use terminal 4 as reference
Installation instructions
207575
17
Systemair Sverige AB
