Installation Instructions

Document No. 129-910
Installation Instructions
May 28, 2015
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and
models as design improvements are introduced. Other product or company names mentioned herein may be the trademarks of their
respective owners. © 2015 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089-4513
USA
+ 1 847-215-1000
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Document No. 129-910
Printed in the USA
Page 3 of 3
Switch Operation
There are two modes of operation for the BT300 Electronic
Bypass when using the Override Switch Kit (BTE-SW-KIT):
1. STANDARD Mode – This is the default operation
mode. The switch must be in this position to
enable the Drive to control the attached motor.
The switch will control the motor in Drive (Auto or
Hand), Off, and Bypass as Normal with the
electronic bypass function of the Drive. See the
Siemens BT300 Bypass Operator’s Manual
(DPD01391) for further information on these
control methods.
2. OVERRIDE Mode – This is a final solution to run
the motor in Override mode if the drive is unable to
function properly. This is NOT an alternative
method of putting the Drive into Override mode in
lieu of using the keypad.
The Override mode supplies line voltage directly to
the motor, and bypasses all controls from the
Drive. The output contactor (M2) will be opened,
and the bypass contactor (M1) will be closed. The
overload still runs in series with the motor’s power
supply.
CAUTION:
When this Override mode is selected, any
safeties wired to the Drive must be
relocated to Terminals 3 and 4 of the
diagnostics board (see Figure 7). If multiple
safeties exist, they must be run in series
with the circuit.