Operating Instructions

Operation Overview
Siemens Building Technologies, Inc. 5
Operation Overview
• Drive Mode
− Drive output contactor closes (and drive input contactor if supplied). The motor is
controlled by the SED2 output.
− Change the position of the "Drive-Off-Bypass" switch to OFF and the Bypass stops the
SED2 by opening digital input 4, stop 3.
• Local Bypass Operation
− Requires a jumper between bypass control terminals 7 and 8. Jumper is supplied from
the factory.
− The system goes to Bypass by closing the bypass contactor. The bypass indicating light
is illuminated whenever the Drive-Off-Bypass switch is placed in the Bypass mode.
− The motor is connected to utility/line power.
• Remote Bypass Operation
− Requires a jumper between bypass control terminals 5 and 6.
− Requires that the Drive-Off-Bypass switch is in the Bypass position.
− The system goes to Bypass by closing the bypass contactor and the bypass indicating
light is illuminated whenever bypass control terminals 1 and 2 are closed (Customer
Remote Start Input).
− The motor is connected to utility/line power.
• Automatic Bypass Operation
− Requires wiring a normally open (NO) contact from DR1 to terminals 9 and 10.
− Requires wiring a normally closed (NC) contact from DR1 to terminals 11 and 12.
− Requires programming of P0731=52.3 and P0748=
.
− Requires that the Drive-Off-Bypass switch be in the DRIVE position.
− The system goes to bypass by closing the bypass contactor and the bypass indicating
light illuminates whenever the drive registers a fault condition and output relay No. 1
changes state.
− The motor is connected to utility/line power.