Grundfos CRN-H MAGdrive, Installation And Operating Instructions Manual

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Eng
lish (US)
12
5.10 Frequency converter operation
The Grundfos CRN-H MAGdrive pumps are designed for
operation with variable speed for pump performance control.
If variable-speed operation is desired, we recommend that you
use a Grundfos CUE frequency converter. In addition to variable-
speed control, CUE has special features that can be used to
perform all of the protective tasks required for CRN-H MAGdrive
pumps (see section
7.1 Pump operation protection
). Contact your
local Grundfos company for more information about the use of
CRN-H MAGdrive pumps with CUE frequency converters.
The use of frequency converters may result in increased acoustic
noise from the motor. Furthermore, it may expose the motor to
detrimental voltage peaks. Both these disturbances can be
eliminated by fitting a filter between the frequency converter and
the motor.
The wires in the terminal box must be as short as possible. The
exception is the ground wire which must be so long that it is the
last wire to be disconnected in case the cable is inadvertently
pulled out of the cable entry.
Fig. 8
Wiring diagram, three-phase mains connection
Fig. 9
Wiring diagram, signal terminals
Note:
Terminals 27, 29 and 37 are not used.
TM
0
3
8
799
2
507
Terminal Function
91 (L1)
Three-phase supply 92 (L2)
93 (L3)
95/99 (PE) Ground connection
96 (U)
Three-phase motor connection, 0-100
% of mains voltage
97 (V)
98 (W)
T
M
06
99
10
08
1
7
Terminal Type Function
12 +24 V out Supply to sensor
13 +24 V out Additional supply
18 DI 1 Digital input, start-stop
19 DI 2 Digital input, programmable
20 GND Ground for digital inputs
32 DI 3 Digital input, programmable
33 DI 4 Digital input, programmable
39 GND Ground for analog output
42 AO1 Analog output, 0+20 mA
50 +10 V out Supply to potentiometer
53 AI 1
External setpoint, 0-10 V / 0/4-20
mA
54 AI 2
Sensor input, sensor 1, 0/4-20
mA
55 GND Ground for analog inputs
61 RS-485 GND Y GENibus, GND
68 RS-485 A GENibus, signal A (+)
69 RS+485 B GENibus, signal B (-)
-
+ +
0/4-20 mA 0/4-20 mA
39 42 50 53 54 55
GND AO 1
+10V out
Ext. setpoint
Sensor 1
GND
RS-485 GND
Y
RS-485 A
RS-485 B
+24 V out +24 V out Start/stop DI 2 DI 3 DI 4 GND
12 13 18 19 27 29 32 33 20
61
61
68
68
69
69
0-20 mA
55 55
0-10 V 0-10 V
12 12
1 K
Terminals
A53 A54
U I U I
See section
5.6
54
53
53 and 54: