Siemens SED2 VFD NEMA Operating Instructions Manual page 15

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Safety Input
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Essential Service Mode
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Siemens Building Technologies, Inc.
If remote bypass operation is also selected, the motor will not run on bypass until
the contact for the Customer Remote Start Input closes.
Requires a jumper between bypass control terminals 3 and 4. Jumper is supplied
from the factory.
Contact must be closed for the motor to be run in either the drive or bypass
modes.
WARNING:
This contact disconnects the 120 Vac control power circuit.
Closing terminals 13 and 16 forces the bypass contactor to close regardless of
the selected operation.
All calls to open the bypass contactor are ignored except the opening of this
contact or the removal of main power.
WARNING:
All calls to open the bypass include ignoring the tripping of the
mechanical overload and opening of the safety input. Perform this
procedure with extreme care.
NEMA Type 3R/3RHE Bypass Operation Overview
7