Siemens Energy & Automation, Inc.
2. Connect the ground terminal (labeled with ground symbol)
to earth ground.
4.5.2 Motor Connections
1. The NEC motor overload protection requirement can be met
with an optional overload relay. Overload relay kits are listed
in Section 10, Spare and Optional Parts, of this manual.
2. For a dual voltage 9-lead wye motor (represented in figures
8 and 9), the 3-lead controller-to-motor terminal connec-
tions are listed in Table 2.
Table 2
3-Lead Connections for Dual Voltage 9-Lead Wye Motor
High Voltage Wiring
Low Voltage Wiring
Controller
Motor
Controller
Motor
Terminal
Terminal
Terminal
Terminal
T1
T1
T1
T1 & T7
T2
T2
T2
T2 & T8
T3
T3
T3
T3 & T9
T4-T7*
T4-T5-T6*
T5-T8*
T6-T9*
* Jumper
3. For multispeed or reversing applications, the SIKOSTART
controller can be used with an electromechanical starter to
provide soft start. The controller output must be connected
to the line input of the multispeed starter and either side of
a reversing starter.
Individual motor overload protection
should be supplied for each motor speed separately. Control
input (A1, A2) is typically run in parallel with the low
speed/forward contactor coil and control input (B1, B2) is
typically run in parallel with the HIGH speed/reverse contac-
tor coil.
4. When using the controller with part winding motors, these
motors must be connected in their full voltage run winding
configuration, and the three motor leads connected to the
controller output terminals.
5. The motor frame should be connected to the earth ground
terminal.
4.6 Control Connections
1. Connect the control power supply (Us) as specified on the
controller label to the X1 and X2 terminals; see figure 13.
2. Connect control circuit pilot devices in accordance with the
application. Section 5 provides examples of several typical
arrangements.
4.7 Installation Check
1. Check that all wiring and power connections are secure and
that mounting bolts are tight.
2. Remove all wire cuttings, installation particles, metal chips
and debris before energizing.
3. Shut enclosure doors to protect equipment from dust and
personnel from hazardous voltage.
Hazardous voltage.
Can cause death, serious injury or
property damage.
The controller case must be grounded to
earth for operator’s safety.
Control voltage too high.
May cause property damage.
Connecting the controller to a control voltage
higher than its rating will destroy logic board
components, thus requiring repair before the
controller can be put into service.
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