Start/Stop Of Pump - Grundfos CRE Montage- Und Betriebsanleitung

5.1.8 Start/stop of pump

The number of starts and stops via the mains voltage
Caution
must not exceed 4 times per hour.
When the pump is switched on via the mains, it will start after
approximately 5 seconds.
If a higher number of starts and stops is desired, use the input for
external start/stop when starting/stopping the pump.
When the pump is switched on via an external on/off switch, it will
start immediately.
Automatic restart
If a pump set up for automatic restart is stopped due
to a fault, it will restart automatically when the fault
Note
has disappeared.
However, automatic restart only applies to fault types set up to
automatic restart. These faults could typically be one of these
faults:
• temporary overload
• fault in the power supply.
5.1.9 Connections Advanced I/O module
As standard the CRE, CRIE, CRNE, CRTE, SPKE, MTRE, BMS
hp pump types come with the Advanced I/O module. Optional the
pump types can be acquired with the basic Pump I/O module see
5.1.10 Connections basic Pump I/O
Advanced I/O module
The module has a number of inputs and outputs enabling the
motor to be used in advanced applications where many inputs
and outputs are required.
The Advanced I/O module has these connections:
• start/stop terminals
• three digital inputs
• one setpoint input
• one sensor input
• one analog output
• GENIbus connection.
If no external on/off switch is connected, connect
Note
terminals 2 and 3 using a short wire.
As a precaution, the wires to be connected to the following
connection groups must be separated from each other by
reinforced insulation in their entire lengths:
Group 1: Inputs
• start/stop (terminals 2 and 3)
• digital inputs (terminals 1 and 9, 10 and 9, 11 and 9)
• setpoint input (terminals 4, 5 and 6)
• sensor input (terminals 7 and 8)
• GENIbus (terminals B, Y and A).
All inputs are internally separated from the mains-conducting
parts by reinforced insulation and galvanically separated from
other circuits.
All control terminals are supplied with protective extra-low voltage
(PELV), thus ensuring protection against electric shock.
Group 2: Output (relay signal, terminals NC, C, NO)
The output is galvanically separated from other circuits.
Therefore, the supply voltage or protective extra-low voltage can
be connected to the output as desired.
• analog output (terminal 12 and 13).
8
module.
Group 3: Mains supply (terminals L1, L2, L3)
A galvanic separation must fulfil the requirements for reinforced
insulation including creepage distances and clearances specified
in EN 60335.
NC C NO
L1 L2 L3
0-10 V
0/4-20 mA
4-20 mA
1/0
1/0
1/0
13 12 11 10 1 9 8 7
STOP
RUN
0/4-20 mA 0-10 V
10K
6 5 4 3 2
Fig. 4 Connection terminals Advanced I/O module
13: GND (frame)
12: Analog output
11: Digital input 4
10: Digital input 3
1: Digital input 2
9: GND (frame)
8: +24 V
7: Sensor input
B: RS-485B
Y: Screen
A: RS-485A
B Y A
6: GND (frame)
5: +10 V
4: Setpoint input
3: GND (frame)
2: Start/stop