5.8.7.2 Functional module, FM310 and FM311 from 15 kW 2-
pole and 11 kW 4-pole
Inputs and outputs
The FM311 functional module does not include Bluetooth
connection.
The module has these connections:
• three analog inputs, VLSE with factory fitted differential pressure
sensor is connected to one of these analog inputs.
• one analog output
• two dedicated digital inputs
• two configurable digital inputs or open-collector outputs
• Input and output for Grundfos Digital Sensor Not applicable for
NBE, NKE, NBSE and VLSE pumps. The factory-fitted
differential-pressure sensor for NBE, NKE, NBSE Series 2000 is
connected to this input.
• Grundfos Digital Sensor input and output
• two Pt100/1000 inputs
• two LiqTec sensor inputs
• two signal relay outputs
• GENIbus/Modbus connection
• two Safe Torque Off (STO) inputs
• Ethernet connection
• Bluetooth (BLE) connection.
3)
3)
FM311 is without Bluetooth.
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.
Signal relay 2
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.
Connection terminals for inputs and outputs
WARNING
Electric shock
Death or serious personal injury
‐ Make sure that the wires to be connected to the connection 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 and the Ethernet cable must be rated at least 250 V/2 A.
The Ethernet cable must be rated at least Cat5e/Cat6 with screening.
The 250V contacts of the alarm relay (NC/C1/NO) on the functional modules FM310 and FM311 must not be connected directly to
the supply mains, but energized by an isolated power supply or transformer with galvanic isolation.
18
English (US)
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