Grundfos CRE Instrucciones De Instalación Y Operación página 12

Connection terminals, CME pumps manufactured prior to
October 1, 2017
This information is optional for CRE, CRIE, CRNE, CME, SPKE
and MTRE pumps.
CME pumps manufactured before October 1, 2017 have these
connections:
• two analog inputs
• two digital inputs or one digital input and one open-collector
output
• Grundfos Digital Sensor input and output
• two signal relay outputs
• GENIbus connection.
See fig. 9.
Digital input 1 is factory-set to be start-stop input
where open circuit results in stop. A jumper has been
factory-fitted between terminals 2 and 6. Remove the
jumper if digital input 1 is to be used as external
start-stop or any other external function.
DANGER
Electric shock
Death or serious personal injury
- Make sure that the wires to be connected to the
connection groups below are separated from each
other by reinforced insulation in their entire
lengths.
• Inputs and outputs
All inputs and outputs are internally separated from the power
supply-conducting parts by reinforced insulation and galvanically
separated from other circuits. All control terminals are supplied by
protective extra-low voltage (PELV), thus ensuring protection
against electric shock.
• Start-stop: (Digital input 1) = Terminals 2 and 6
• Pressure sensor: (Analog input 1) = Terminals 4 and 8
• Pressure switch: (Digital input 3) = Terminals 6 and 10
• External analog signal input: (Analog input 2) = Terminals 7
and 23
GENIbus Terminals A, Y and B
• Signal relay outputs
– Signal relay 1:
LIVE:
You can connect supply voltages up to 250 VAC to the
output.
PELV:
The output is galvanically separated from other circuits.
Therefore, you can connect the supply voltage or protective
extra-low voltage to the output as desired.
– Signal relay 2:
PELV:
The output is galvanically separated from other circuits.
Therefore, you can connect the supply voltage or protective
extra-low voltage to the output as desired.
• Power supply (terminals N, PE, L or L1, L2, L3, PE).
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