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8. Elactrical connections
8.1 Controls clamp strip
The clamp strip of the controls is shown below.
8a. A = sensor connection, B = 0-10v controls uitput, C = failure contact make, D = power supply 230V, 50Hz, E = PC/control unit connection, F = 2nd. PC/control unit connection,
G = failure contact break, H = release contact and I = motor connection
8b. A = to work switch, B = PC/control unit connection, C = Loop 1, D = Loop 2 and E = Loop 3
8.2 Wiring upon delivery The MX-ZMV
The MX standard
There are three loops on the controls clamp strip. One or more loops may
need to be removed in order to connect up control equipment. Refer to the
applicable diagrams in Wiring diagrams - Appendices.
• LUS1 is used to connect the +10V to the first clamp of the release contact.
• LUS2 is used to connect the GND to the second clamp of the release con-
tact.
• LUS3 is used to connect the +10V to the Esoll of the 0-10V controls input.
LUS1 and LUS2 provide current for the release contact. Via LUS3, there is 10V
on the Esoll of the 0-10 controls input. The fan will therefore operate at maxi-
mum capacity following connection,
The MX-ZMV
There are two loops on the controls clamp strip. One or more loops may need
to be removed in order to connect up control equipment. Refer to the applica-
ble diagrams in
Wiring diagrams - Appendices
.
• LUS1 is used to connect the +10V to the first clamp of the release contact.
• LUS2 is used to connect the GND to the second clamp of the release contact.
LUS1 and LUS2 provide current for the release contact. After connection, the
fan will therefore operate at such a speed that the set pressure is reached.
When not installed (freely exhausting), the fan cannot build up pressure and
therefore operates at maximum capacity.
PE 1
18 V
E
ist
GND
U3
10 V
E
soll
GND
U3
RS
A
RS
B
RS
A
RS
B
GND
U3
An
L
N
Ö
G
S
G
EN
EN
KL2B
KL2A
B
A
KL3B
KL3A
KL4
D
C
E
• Sensor connection: for connection of the pressure sensor module of the
MX-ZMV or other sensor.
• Release contact: the current at this contact must be 10- 250 volt [AC or
DC]. When there is no current at the release contact, the fan will not work,
even if there is 230V power supply.
• Malfunction contacts: There is a make and break contact. In case of a mal-
function, the contact between the two KL3A clamps is closed and between
the two KL3B clamps is opened. The reverse situation occurs when there is
‘no malfunction’.
• Communication connection: for adjustment and reading of the MX using the
VU Control Unit or the laptop/PC. The contact is double: one A/B connection
is connected to a sub-D9 connector in the frame, one A/B connector is free
and can be used for looping when the MX is included in a network.
• Leakage current ± 10mA
☞
Attention! At Esoll/GND impedance Ri = 90 kOhm
☞
Attention! At Eist/GND impedance Ri = 90 kOhm
When connected to an external foreign signal on Esoll or Eist, ensure galvanic
isolation.
PE 1
18 V E
ist
GND
U3
10 V E
soll
GND
U3
RS
A
RS
B
RS
A
RS
B
GND
U3
An
L
N
Ö
G
S
G
EN EN
A
B
KL2B
KL2A
G
E
H
F
+15V
U4
+15V
U4
TW
PTC
GND
U4
GND
U4
H1 H2
H3
U
V
W
I
KL3B
KL3A
KL4
KL5A
KL5B
KL6
PE2
D
C
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