Terminal Type Function
S24 +24 V (STO) Power supply to the Safe Torque Off inputs
ST1 STO1 Safe Torque Off - Input 1
ST2 STO2 Safe Torque Off - Input 2
6.10 Signal relays
The motor has two outputs for potential-free signals via two internal relays. You can set the signal outputs to
Operation, Pump running, Ready, Alarm and Warning.
The functions of the two signal relays appear from the table below:
Grundfos Eye is off
The power is off.
Operation Pump running Ready Alarm Warning Operating mode
-
Grundfos Eye is rotating green
The pump runs in Normal mode in open or closed loop.
Operation
Pump running Ready Alarm Warning Operating mode
Normal
Min.
or
Max.
Grundfos Eye is rotating green
The pump runs in Manual mode.
Operation
Pump running Ready Alarm Warning Operating mode
Manual
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