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Installation
S811+ Soft Starter
MN03900001E—November 2012
23
Control Wiring Application Notes
CAUTION
Only apply 24 Vdc to the control terminal block. Control
wiring is 22–12 AWG (0.33–4.0 mm
2
). Failure to follow this
caution may result in damage to the control circuit.
1.
Connect 24 Vdc Supply positive to Terminal “+” using a
minimum wire of 14 AWG (2.5 mm
2
).
2.
Connect 24 Vdc Supply negative to Terminal “–“ using a
minimum wire of 14 AWG (2.5 mm
2
).
3.
24 Vdc Control voltage must not exceed 30 Vdc to
prevent hardware damage.
4.
24 Vdc Control voltage must not fall below 18 Vdc.
Exchanging a Digital Interface Module (DIM)
The S811+ utilizes the Digital Interface Module (DIM) to
change the configuration of operating parameters with a
display to indicate values and fault codes. When entering
parameter changes, parameter information is stored on the
S811+ printed circuit board.
The S811+ is configured to operate if the Digital Interface
Module is removed from the soft starter (default). The soft
starter may be configured to require installation of the DIM
for operation.
Upon initial power up with 24 Vdc control voltage, the S811+
will auto detect an installed Digital Interface Module or a
Control Interface Module (CIM)
Using a Supplemental Line Contactor
In some installations, it may be necessary to use an
electromagnetic contactor in series with the soft starter. In
this case, it is recommended that the contactor be placed on
the load side of the soft starter. The contactor must be
closed prior to starting the soft starter and remain closed
until the Soft Starter has been stopped to ensure proper soft
starter and system operation.
If an electromagnetic contactor is used on the line side of the
soft starter, additional control circuitry must be supplied by
the user when using edge control to ensure the line power is
supplied to the soft starter before control power is applied. If
this sequence is not followed, the soft starter will fault on
either a phase loss or zero voltage-crossing fault.
If it is desired to place an electromagnetic contactor on the
line side of the soft starter, Eaton recommends using level
sense option. With level sense, no additional control circuitry
is required. A start can be completed when the line power is
supplied to the unit after the control power, providing the
Reset Mode
parameter is set to AUTO and the unit has a
Ready light status with 24 Vdc on the
Start
terminal.
If the AUTO Reset Mode setting is used, CAUTION must
be exercised to assure that any restart occurs in the safe
manner.