6.8.4 Overtemperature protection
The motor is thermally protected by a temperature
measurement in the drive. It can handle the lack of
airflow over the motor in case the fan cover is
blocked. It also means that the protection has a built-
in memory retention.
The time from start to shutdown due to
overtemperature is therefore always longer when
starting at a motor temperature close to the ambient
temperature compared with restarting after a
shutdown due to overtemperature.
6.8.5 Protection against phase unbalance
Phase unbalance on the power supply must be
minimised. The three-phase motor must be
connected to a power supply with a quality
corresponding to IEC 60146-1-1, class C. This also
ensures long life of the components.
6.8.6 Short-circuit current
The product's electronic power output short-circuit
protection circuitry meets the requirements of IEC
60364-4-41:2005/AMD1:-, Clause 411.
Model J: If a short circuit occurs, the pump can be
used on a power supply delivering not more than
5000 RMS symmetrical amperes, 600 V maximum.
Model K: Suitable for use on a circuit capable of
delivering not more than 5000 rms symmetrical
amperes, 480 V maximum when protected by gG
fuses. See the section on fuse sizes.
6.9 Functional modules
The functional modules are different types of add-on
boards containing various types of input and output
terminals for the user to connect different types of
sensors, for example switches and relays.
The product can only contain one functional module
at the time.
The following functional modules are available:
• FM110
• FM310
• FM311
3)
3)
Without Bluetooth (BLE).
The selection of module depends on the application
and the required number of inputs and outputs.
Cable connections
The screen of signal cables and bus connection
cables must be connected to ground via one of the
earth clamps (H).
See the section on signal cables and bus connection
cables.
TM084041
Model J
TM082868
Model K
Related information
2.3.3 Identification of the functional module
6.11 Signal cables
6.9.1 Functional module, FM110
Inputs and outputs
The module has these connections:
• two analog inputs
• two digital inputs or one digital input and one
open-collector output
• Grundfos Digital Sensor input and output
• one signal relay output
• GENIbus/Modbus connection
• two Safe Torque Off (STO) inputs
• Bluetooth (BLE) connection.
Signal relay 1
LIVE: You can connect supply voltages up to 250
VAC to the output.
SELV: The output is galvanically separated from other
circuits. Therefore, you can connect the supply
voltage or safety extra-low voltage to the output as
desired.
WARNING
Electric shock
Death or serious personal injury
‐ Make sure that the wires to be
connected to the relays below are
separated from each other by
reinforced insulation in their entire
lengths.
The inputs and outputs are internally separated from
the mains-conducting parts by reinforced insulation
and galvanically separated from other circuits. All
control terminals are supplied with safety extra-low
voltage (SELV), ensuring protection against electric
shock.
Cables for the relays must be double insulated or
reinforced and rated at least 250V/2A.
The Ethernet cable must be rated at least Cat5e/Cat6
with screening.
19
English (GB)
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