Electrical connection
en
Installation and operating instructions Wilo DD-I
109
4.5.1
Mains connection, pump
Wilo-EFC frequency converter
+DC
BR-
B
M
A
I N
S
L1 L2 L3
91 92 93
99
U V W
MOTOR
99
Fig. 6:
Pump connection: Wilo-EFC
Terminal
Wiring diagram
96
U
97
V
98
W
99
Earth (PE)
Insert the motor connection cables into the frequency converter through the threaded
cable gland. Connect the wires as per the connection diagram.
NOTICE! Widely position cable shielding!
4.5.2
Digital Data Interface power sup-
ply connection
Wilo-EFC frequency converter
12 13 18 19 27 29 32 33 20 37
Fig. 7:
Wilo-EFC terminal
Terminal
Control cable wire
Description
13
1
Power supply: +24 VDC
20
2
Power supply: Reference potential (0 V)
4.5.3
Connecting PTC sensors to the
motor winding
Wilo-EFC frequency converter
DANGER
Risk of fatal injury due to incorrect connection!
If the pump is used in explosive atmospheres, observe chapter "Electrical connection
in potentially explosive atmospheres"!
19 27 29 32 33 20 37
Fig. 8:
Wilo-EFC terminal
Terminal
Control cable wire
Description
50
3
+10 VDC power supply
33
4
Digital input: PTC/WSK
Pt100 or Pt1000 sensors installed in the motor winding are used for thermal motor
monitoring as part of software. View and adjust current temperature values and config-
ure limit temperatures with the user interface. PTC sensors installed in the hardware
define the maximum winding temperature and switch off the motor in an emergency.
CAUTION! Perform a functional check! Check the resistance prior to connecting the
PTC sensor.
Use an ohmmeter to measure the temperature sensor's resistance. PTC
sensors have a cold resistance between 60 and 300 ohm.
4.5.4
Network connection
Wilo-EFC frequency converter
Prepare the network control cable and install the enclosed RJ45 plug. Connect to a net-
work socket, e.g. at the "MCA 122" Ethernet module.
4.5.5
Connecting digital inputs
Note the following when connecting digital inputs:
ƒ
Use shielded cables.
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