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8. Elactrical connections
8.1 Controls clamp strip
The clamp strip of the controls is shown below.
A
KL2B
PE 1
GND
18 V E
U3 10 V E
ist
RS
RS
RS
L
N
A
B
A
KL2A
D
E
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
• 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'.
A
KL2B
PE 1
GND
E
18 V
U3 10 V
ist
RS
RS
RS
L
N
A
B
A
KL2A
B
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,
B
C
KL3B
GND
Ö
G
U3
soll
RS
GND
S
G
An
B
U3
KL3A
F
G
KL3B
C
GND
E
Ö
G
soll
U3
E
RS
GND
S
G
An
B
U3
KL3A
D
KL5A
+15V
GND
+15V
TW
U4
U4
U4
PTC
H1 H2 H3
EN EN
KL4
KL5B
H
• 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.
EN
EN
KL4
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.
36
PE2
GND
U4
U
V
W
KL6
I
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