Operating Instructions

SED2 Conventional Bypass Option Operating Instructions
6 Siemens Building Technologies, Inc.
Operation Overview, continued
a. Safety Input
− 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.
• Essential Service Mode
− Closing between 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 of the tripping of the
mechanical overload and opening of the safety input. This procedure should
be performed with extreme care.