Servomotor With Reversing Potentiometer; Electrical Connection; Determining The Direction Of Rotation - Grundfos 384-511 Instrucciones De Instalación Y Funcionamiento

To ensure electromagnetic compatibility
(EMC), the signal cables must be shielded.
The screen must be connected on one
Caution side to PE (earth) or to the housing earth
(earth terminal).
Lay signal and mains cables in separate
cable channels.
For parallel operation: If several drives are
controlled via a shared contact, e.g. if
Caution
there are two servomotors on one duplex
pump, every drive must be equipped with a
relay for parallel operation.
Lay the mains supply lines with
Note
cross-sections that conform to the relevant
VDE guidelines.
Use separate, shielded lines for low
Note
voltages (e.g. potentiometers, analogue
signals).
Use screwed cable joints appropriate for
the connection line.
Note
The stated degree of protection can only
be ensured if suitable screwed cable joints
are used.
10.2 Servomotor with reversing
potentiometer
10.2.1 Circuit diagram
(max.) (min.)
1 2 3 4
5
N
Motor control Limit
switches
Fig. 8 Circuit diagram for a servomotor with
reversing potentiometer

10.2.2 Electrical connection

1. Unscrew the hood screws and remove the hood.
2. Establish the electrical connections in
3. Determine the direction of rotation and, if

10.2.3 Determining the direction of rotation

The internal wiring means that the direction of
rotation (looking through the drive towards the output
shaft) and limit switches are assigned as follows:
•
18 19 20
< 50 V
< 50 V
•
Reversing
potentiometer
•
•
Item Description
1 N Neutral
Supply voltage input
(for direction "open/max.")
2 Phase
1 N Neutral
Supply voltage input
(for direction "close/min.")
3 Phase
Supply voltage output
4
(position "final position max.")
Supply voltage output
5
(position "final position min.")
PE (earth)
18 Start
19 Slider
20 End
Observe the information contained in
Note
section 10.1 General warnings and notes
on the electrical connection.
accordance with the circuit diagram; see fig. 8.
– Connect terminals 18, 19 and 20 in accordance
with requirements; voltage < 50 V.
necessary, correct it.
If supply voltage is present at terminal 2, the
output shaft rotates anticlockwise (in the direction
"open/max.").
– This direction of rotation is restricted by the
upper switch (max.). If the switch is activated,
supply voltage is present at terminal 4.
If supply voltage is present at terminal 3, the
output shaft rotates clockwise (in the direction
"close/min.").
– This direction of rotation is restricted by the
lower switch (min.). If the switch is activated,
supply voltage is present at terminal 5.
If the drive rotates in the opposite direction to the
control commands, swap over the connections of
terminals 2 and 3.
Warning
The internal wiring of the drive must never
be modified.
Close the hood again and tighten the hood
screws.
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