Grundfos CRIE Installation And Operating Instructions Manual page 13

6.4.2 Connection terminals, CME pumps
The CME pump has 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 will result in stop. A jumper
has been factory-fitted between terminals 2 and
Note
6. Remove the jumper if digital input 1 is to be
used as external start/stop or any other external
function.
As a precaution, the wires to be connected to the
connection groups below must be separated
Note
from each other by reinforced insulation in their
entire lengths.
• Inputs and outputs
All 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 by safety extra-low voltage
(SELV), thus ensuring protection against electric shock.
• Signal relay outputs
– Signal relay 1:
LIVE:
Mains supply voltages up to 250 VAC can be connected to
this output.
SELV:
The output is galvanically separated from other circuits.
Therefore, the supply voltage or safety extra-low voltage
can be connected to the output as desired.
– Signal relay 2:
SELV:
The output is galvanically separated from other circuits.
Therefore, the supply voltage or safety extra-low voltage
can be connected to the output as desired.
• Mains supply (terminals N, PE, L or L1, L2, L3, PE).
A galvanically safe separation must fulfil the requirements for
reinforced insulation including creepage distances and
clearances specified in EN 61800-5-1.
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